以下是小编收集整理的托福TPO7阅读真题Part3及参考答案，本文共12篇，希望对大家有所帮助。本文原稿由网友“nuihr”提供。
篇1：托福TPO1阅读真题原文及答案翻译part3
Timberline Vegetation on Mountains
The transition from forest to treeless tundra on a mountain slope is often a dramatic one. Within a vertical distance of just a few tens of meters, trees disappear as a life-form and are replaced by low shrubs, herbs, and grasses. This rapid zone of transition is called the upper timberline or tree line. In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture.
The upper timberline, like the snow line, is highest in the tropics and lowest in the Polar Regions. It ranges from sea level in the Polar Regions to 4,500 meters in the dry subtropics and 3,500-4,500 meters in the moist tropics. Timberline trees are normally evergreens, suggesting that these have some advantage over deciduous trees (those that lose their leaves) in the extreme environments of the upper timberline. There are some areas, however, where broadleaf deciduous trees form the timberline. Species of birch, for example, may occur at the timberline in parts of the Himalayas.
At the upper timberline the trees begin to become twisted and deformed. This is particularly true for trees in the middle and upper latitudes, which tend to attain greater heights on ridges, whereas in the tropics the trees reach their greater heights in the valleys. This is because middle- and upper- latitude timberlines are strongly influenced by the duration and depth of the snow cover. As the snow is deeper and lasts longer in the valleys, trees tend to attain greater heights on the ridges, even though they are more exposed to high-velocity winds and poor, thin soils there. In the tropics, the valleys appear to be more favorable because they are less prone to dry out, they have less frost, and they have deeper soils.
There is still no universally agreed-on explanation for why there should be such a dramatic cessation of tree growth at the upper timberline. Various environmental factors may play a role. Too much snow, for example, can smother trees, and avalanches and snow creep can damage or destroy them. Late-lying snow reduces the effective growing season to the point where seedlings cannot establish themselves. Wind velocity also increases with altitude and may cause serious stress for trees, as is made evident by the deformed shapes at high altitudes. Some scientists have proposed that the presence of increasing levels of ultraviolet light with elevation may play a role, while browsing and grazing animals like the ibex may be another contributing factor. Probably the most important environmental factor is temperature, for if the growing season is too short and temperatures are too low, tree shoots and buds cannot mature sufficiently to survive the winter months.
Above the tree line there is a zone that is generally called alpine tundra. Immediately adjacent to the timberline, the tundra consists of a fairly complete cover of low-lying shrubs, herbs, and grasses, while higher up the number and diversity of species decrease until there is much bare ground with occasional mosses and lichens and some prostrate cushion plants. Some plants can even survive in favorable microhabitats above the snow line. The highest plants in the world occur at around 6,100 meters on Makalu in the Himalayas. At this great height, rocks, warmed by the sun, melt small snowdrifts.
The most striking characteristic of the plants of the alpine zone is their low growth form. This enables them to avoid the worst rigors of high winds and permits them to make use of the higher temperatures immediately adjacent to the ground surface. In an area where low temperatures are limiting to life, the importance of the additional heat near the surface is crucial. The low growth form can also permit the plants to take advantage of the insulation provided by a winter snow cover. In the equatorial mountains the low growth form is less prevalent.
Paragraph 1: The transition from forest to treeless tundra on a mountain slope is often adramatic one. Within a vertical distance of just a few tens of meters, trees disappear as a life-form and are replaced by low shrubs, herbs, and grasses. This rapid zone of transition is called the upper timberline or tree line. In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture.
托福TPO1阅读真题题目Part3
1. The word “dramatic” in the passage is closest in meaning to
○gradual
○complex
○visible
○striking
2. Where is the lower timberline mentioned in paragraph 1 likely to be found?
○In an area that has little water
○In an area that has little sunlight
○Above a transition area
○On a mountain that has on upper timberline.
3. Which of the following can be inferred from paragraph 1 about both the upper and lower timberlines?
○Both are treeless zones.
○Both mark forest boundaries.
○Both are surrounded by desert areas.
○Both suffer from a lack of moisture.
Paragraph 2: The upper timberline, like the snow line, is highest in the tropics and lowest in the Polar Regions. It ranges from sea level in the Polar Regions to 4,500 meters in the dry subtropics and 3,500-4,500 meters in the moist tropics. Timberline trees are normally evergreens, suggesting that these have some advantage over deciduous trees (those that lose their leaves) in the extreme environments of the upper timberline. There are some areas, however, where broadleaf deciduous trees form the timberline. Species of birch, for example, may occur at the timberline in parts of the Himalayas.
4. Paragraph 2 supports which of the following statements about deciduous trees?
○They cannot grow in cold climates.
○They do not exist at the upper timberline.
○They are less likely than evergreens to survive at the upper timberline.
○They do not require as much moisture as evergreens do.
Paragraph 3: At the upper timberline the trees begin to become twisted and deformed. This is particularly true for trees in the middle and upper latitudes, which tend to attain greater heights on ridges, whereas in the tropics the trees reach their greater heights in the valleys. This is because middle- and upper- latitude timberlines are strongly influenced by the duration and depth of the snow cover. As the snow is deeper and lasts longer in the valleys, trees tend to attain greater heights on the ridges, even though they are more exposed to high-velocity winds and poor, thin soils there. In the tropics, the valleys appear to be more favorable because they are less prone to dry out, they have less frost, and they have deeper soils.
5. The word “attain” in the passage is closest in meaning to
○require
○resist
○achieve
○endure
6. The word “they” in the passage refers to
○valleys
○trees
○heights
○ridges
7. The word “prone” in the passage is closest in meaning to
○adapted
○likely
○difficult
○resistant
8. According to paragraph 3, which of the following is true of trees in the middle and upper latitudes?
○Tree growth is negatively affected by the snow cover in valleys
○Tree growth is greater in valleys than on ridges.
○Tree growth on ridges is not affected by high-velocity winds.
○Tree growth lasts longer in those latitudes than it does in the tropics.
Paragraph 4：There is still no universally agreed-on explanation for why there should be such a dramatic cessation of tree growth at the upper timberline. Various environmental factors may play a role. Too much snow, for example, can smother trees, and avalanches and snow creep can damage or destroy them. Late-lying snow reduces the effective growing season to the point where seedlings cannot establish themselves. Wind velocity also increases with altitude and may cause serious stress for trees, as is made evident by the deformed shapes at high altitudes. Some scientists have proposed that the presence of increasing levels of ultraviolet light with elevation may play a role, while browsing and grazing animals like the ibex may be another contributing factor. Probably the most important environmental factor is temperature, for if the growing season is too short and temperatures are too low, tree shoots and buds cannot mature sufficiently to survive the winter months.
9. Which of the sentences below best express the essential information in the highlighted sentence in the passage? In correct choices change the meaning in important ways or leave out essential information.
○Because of their deformed shapes at high altitudes, trees are not likely to be seriously harmed by the strong winds typical of those altitudes.
○As altitude increases, the velocity of winds increase, leading to a serious decrease in the number of trees found at high altitudes.
○The deformed shapes of trees at high altitudes show that wind velocity, which increase with altitude, can cause serious hardship for trees.
○Increased wind velocity at high altitudes deforms the shapes of trees, and this may cause serious stress for trees.
10. In paragraph 4, what is the author's main purpose in the discussion of the dramatic cessation of tree growth at the upper timberline?
○To argue that none of several environment factors that are believed to contribute to that phenomenon do in fact play a role in causing it.
○To argue in support of one particular explanation of that phenomenon against several competing explanations
○To explain why the primary environmental factor responsible for that phenomenon has not yet been identified
○To present several environmental factors that may contribute to a satisfactory explanation of that phenomenon
Paragraph 6: The most striking characteristic of the plants of the alpine zone is their low growth form. This enables them to avoid the worst rigors of high winds and permits them to make use of the higher temperatures immediately adjacent to the ground surface. In an area where low temperatures are limiting to life, the importance of the additional heat near the surface is crucial. The low growth form can also permit the plants to take advantage of the insulation provided by a winter snow cover. In the equatorial mountains the low growth form is lessprevalent.
11. The word “prevalent” in the passage is closest in meaning to
○predictable
○widespread
○successful
○developed
12. According to paragraph 6, all of the following statements are true of plants in the alpine zone EXCEPT:
○Because they are low, they are less exposed to strong winds.
○Because they are low, the winter snow cover gives them more protection from the extreme cold.
○In the equatorial mountains, they tend to be lower than in mountains elsewhere.
○Their low growth form keeps them closer to the ground, where there is more heat than further up.
Paragraph 5: Above the tree line there is a zone that is generally called alpine tundra. █Immediately adjacent to the timberline, the tundra consists of a fairly complete cover of low-lying shrubs, herbs, and grasses, while higher up the number and diversity of species decrease until there is much bare ground with occasional mosses and lichens and some prostrate cushion plants. █Some plants can even survive in favorable microhabitats above the snow line. The highest plants in the world occur at around 6,100 meters on Makalu in the Himalayas. █At this great height, rocks, warmed by the sun, melt small snowdrifts. █
13. Look at the four squares [█] that indicate where the following sentence could be added to the passage.
This explains how, for example, alpine cushion plants have been found growing at an altitude of 6,180 meters.
Where would the sentence best fit?
14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
At the timberline, whether upper or lower, there is a profound change in the growth of trees and other plants.
●
●
●
Answer choices
○Birch is one of the few species of tree that can survive in the extreme environments of the upper timberline.
○There is no agreement among scientists as to exactly why plant growth is sharply different above and below the upper timberline.
○The temperature at the upper timberline is probably more important in preventing tree growth than factors such as the amount of snowfall or the force of winds.
○The geographical location of an upper timberline has an impact on both the types of trees found there and their physical characteristics.
○High levels of ultraviolet light most likely play a greater role in determining tree growth at the upper timberline than do grazing animals such as the ibex.
○Despite being adjacent to the timberline, the alpine tundra is an area where certain kinds of low trees can endure high winds and very low temperatures
篇2：托福TPO1阅读真题原文及答案翻译part3
山上树带界线的植被
通常从山坡上的森林到没有树的苔原是一种非常戏剧化的转变。在一个垂直距离只有几十米的地方，树木这种生命形式就消失了，取而代之的是低矮的灌木、草本植物和牧草。这种快速过渡的区域被称为上行树带界线或林木线。在许多干旱的地区存在着下行树带界线，在这里由于缺乏水分森林变成干草原，甚至在最下端会出现沙漠。
上行树带界线，和雪线一样，在热带最高，在极地最低。从极地地区的海平面到干燥的亚热带地区的海拔4 500米处以及潮湿的热带地区海拔3 500米至4 500米处都有上行树带界线。树带界线内通常是常绿树，它们和处于上行树带界线处极端恶劣环境中生长的落叶树木相比，具有一定的优势。然而，在部分地区也有由落叶阔叶林组成的树带界线。例如，在喜马拉雅的部分地区，桦树就在树带界线上。
上行树带界线的树木开始扭曲和变形，尤其在中高纬度地区的树木，这些地区的树木往往会在山脊上长得更高，而在热带地区的树木则在山谷里长得更高;因为中高纬度地区树带界线受积雪覆盖时间和深度的影响很大。由于山谷中积雪覆盖较厚且持续时间很长，树木即便是生长在大风和贫瘠的土地里，也往往会在山脊上长得更高。在热带地区山谷里更有利于生长，因为山谷不易干涸、很少结霜，并且有更深的土壤。
目前还没有一个普遍认同的解释来说明为什么会在树带界线上出现树木停止生长这种戏剧化的现象。多种环境因素都起到作用，例如，积雪过多会让树木透不过气，雪崩和雪移能摧毁树木;长时间积雪缩短了有效生长季节的时间，树苗无法生长;另外，风速会随着海拔的升高而增加，增加树木承受的压力，很明显，正是这种风速带来的压力导致树木在高纬度地区发生变形。一些科学家提出，随着海拔的上升而不断增强的紫外线、野生山羊等动物的放养，都是导致树带界线形成的因素。或许最重要的环境因素是温度，因为如果生长季节太短并且气温太低，树芽和树苗都无法充分地成长而存活过冬季。
在林木线之上有一个称为高山苔原的地带。由于紧挨着树带界线，苔原上都是矮灌木、草本植物和牧草。随着海拔的增加，物种的数量和多样性会逐渐减少，直到出现大量空地伴着零星的苔藓和地衣这样的伏地垫状植物。有些植物甚至可以在雪线以上有利的微环境中生存，世界上海拔最高的植物是出现在喜马拉雅山上6 100百米的马卡鲁峰。在这个高度上，被阳光温暖过的岩石可以将小雪堆融化。
高山植物最突出的特点是其低矮的生长形态。这种特点使他们能够避开大风最强势的势头，并且有助于他们利用紧邻地面相对较高的温度。在这样一个低温限制生命的地区，地表提供的额外温度是至关重要的。低矮的生长形态也可以帮助植物充分利用冬季积雪所提供的保温环境。在赤道区的山脉上低矮的生长形态并不常见。
托福TPO1阅读真题原文及答案翻译
篇3：托福TPO7阅读真题Part3及参考答案
Agriculture, Iron, and the Bantu Peoples
There is evidence of agriculture in Africa prior to 3000 B.C. It may have developed independently, but many scholars believe that the spread of agriculture and iron throughout Africa linked it to the major centers of the Near East and Mediterranean world. The drying up of what is now the Sahara desert had pushed many peoples to the south into sub-Sahara Africa. These peoples settled at first in scattered hunting-and-gathering bands, although in some places near lakes and rivers, people who fished, with a more secure food supply, lived in larger population concentrations. Agriculture seems to have reached these people from the Near East, since the first domesticated crops were millets and sorghums whose origins are not African but west Asian. Once the idea of planting diffused, Africans began to develop their own crops, such as certain varieties of rice, and they demonstrated a continued receptiveness to new imports. The proposed areas of the domestication of African crops lie in a band that extends from Ethiopia across southern Sudan to West Africa. Subsequently, other crops, such as bananas, were introduced from Southeast Asia.
Livestock also came from outside Africa. Cattle were introduced from Asia, as probably were domestic sheep and goats. Horses were apparently introduced by the Hyksos invaders of Egypt (1780-1560 B.C.) and then spread across the Sudan to West Africa. Rock paintings in the Sahara indicate that horses and chariots were used to traverse the desert and that by 300-200 B.C., there were trade routes across the Sahara. Horses were adopted by peoples of the West African savannah, and later their powerful cavalry forces allowed them to carve out large empires. Finally, the camel was introduced around the first century A.D. This was an important innovation, because the camel's abilities to thrive in harsh desert conditions and to carry large loads cheaply made it an effective and efficient means of transportation. The camel transformed the desert from a barrier into a still difficult, but more accessible, route of trade and communication.
Iron came from West Asia, although its routes of diffusion were somewhat different than those of agriculture. Most of Africa presents a curious case in which societies moved directly from a technology of stone to iron without passing through the intermediate stage of copper or bronze metallurgy, although some early copper-working sites have been found in West Africa. Knowledge of iron making penetrated into the forest and savannahs of West Africa at roughly the same time that iron making was reaching Europe. Evidence of iron making has been found in Nigeria, Ghana, and Mali.
This technological shift cause profound changes in the complexity of African societies. Iron represented power. In West Africa the blacksmith who made tools and weapons had an important place in society, often with special religious powers and functions. Iron hoes, which made the land more productive, and iron weapons, which made the warrior more powerful, had symbolic meaning in a number of West Africa societies. Those who knew the secrets of making iron gained ritual and sometimes political power.
Unlike in the Americas, where metallurgy was a very late and limited development, Africans had iron from a relatively early date, developing ingenious furnaces to produce the high heat needed for production and to control the amount of air that reached the carbon and iron ore necessary for making iron. Much of Africa moved right into the Iron Age, taking the basic technology and adapting it to local conditions and resources.
The diffusion of agriculture and later of iron was accompanied by a great movement of people who may have carried these innovations. These people probably originated in eastern Nigeria. Their migration may have been set in motion by an increase in population caused by a movement of peoples fleeing the desiccation, or drying up, of the Sahara. They spoke a language, proto-Bantu (“Bantu” means “the people”), which is the parent tongue of a language of a large number of Bantu languages still spoken throughout sub-Sahara Africa. Why and how these people spread out into central and southern Africa remains a mystery, but archaeologists believe that their iron weapons allowed them to conquer their hunting-gathering opponents, who still used stone implements. Still, the process is uncertain, and peaceful migration-or simply rapid demographic growth-may have also caused the Bantu explosion.
Paragraph 1: There is evidence of agriculture in Africa prior to 3000 B.C. It may have developed independently, but many scholars believe that the spread of agriculture and iron throughout Africa linked it to the major centers of the Near East and Mediterranean world. The drying up of what is now the Sahara desert had pushed many peoples to the south into sub-Sahara Africa. These peoples settled at first in scattered hunting-and-gathering bands, although in some places near lakes and rivers, people who fished, with a more secure food supply, lived in larger population concentrations. Agriculture seems to have reached these people from the Near East, since the first domesticated crops were millets and sorghums whose origins are not African but west Asian. Once the idea of planting diffused, Africans began to develop their own crops, such as certain varieties of rice, and they demonstrated a continued receptiveness to new imports. The proposed areas of the domestication of African crops lie in a band that extends from Ethiopia across southern Sudan to West Africa. Subsequently, other crops, such as bananas, were introduced from Southeast Asia.
篇4：托福TPO7阅读真题Part3及参考答案
1. The word “diffused” in the passage is closest in meaning to
○ emerged
○ was understood
○ spread
○ developed
2. According to paragraph 1, why do researchers doubt that agriculture developed independently in Africa?
○African lakes and rivers already provided enough food for people to survive without agriculture.
○The earliest examples of cultivated plants discovered in Africa are native to Asia.
○Africa's native plants are very difficult to domesticate.
○African communities were not large enough to support agriculture.
3. In paragraph 1, what does the author imply about changes in the African environment during this time period?
○The climate was becoming milder, allowing for a greater variety of crops to be grown.
○Although periods of drying forced people south, they returned once their food supply was secure.
○Population growth along rivers and lakes was dramatically decreasing the availability of fish.
○A region that had once supported many people was becoming a desert where few could survive.
Paragraph 2: Livestock also came from outside Africa. Cattle were introduced from Asia, as probably were domestic sheep and goats. Horses were apparently introduced by the Hyksos invaders of Egypt (1780-1560 B.C.) and then spread across the Sudan to West Africa. Rock paintings in the Sahara indicate that horses and chariots were used to traverse the desert and that by 300-200 B.C., there were trade routes across the Sahara. Horses were adopted by peoples of the West African savannah, and later their powerful cavalry forces allowed them to carve out large empires. Finally, the camel was introduced around the first century A.D. This was an important innovation, because the camel's abilities to thrive in harsh desert conditions and to carry large loads cheaply made it an effective and efficient means of transportation. The camel transformed the desert from a barrier into a still difficult, but more accessible, route of trade and communication.
4. According to paragraph 2, camels were important because they
○ were the first domesticated animal to be introduced to Africa
○ allowed the people of the West African savannahs to carve out large empires
○ helped African peoples defend themselves against Egyptian invaders
○ made it cheaper and easier to cross the Sahara
5. According to paragraph 2, which of the following were subjects of rock paintings in the Sahara?
○Horses and chariots
○Sheep and goats
○Hyksos invaders from Egypt
○Camels and cattle
Paragraph 3: Iron came from West Asia, although its routes of diffusion were somewhat different than those of agriculture. Most of Africa presents a curious case in which societies moved directly from a technology of stone to iron without passing through the intermediate stage of copper or bronze metallurgy, although some early copper-working sites have been found in West Africa. Knowledge of iron making penetrated into the forest and savannahs of West Africa at roughly the same time that iron making was reaching Europe. Evidence of iron making has been found in Nigeria, Ghana, and Mali.
6. What function does paragraph 3 serve in the organization of the passage as a whole?
○It contrasts the development of iron technology in West Asia and West Africa.
○It discusses a non-agricultural contribution to Africa from Asia.
○It introduces evidence that a knowledge of copper working reached Africa and Europe at the same time.
○It compares the rates at which iron technology developed in different parts of Africa.
Paragraph 4: This technological shift cause profound changes in the complexity of African societies. Iron represented power. In West Africa the blacksmith who made tools and weapons had an important place in society, often with special religious powers and functions. Iron hoes, which made the land more productive, and iron weapons, which made the warrior more powerful, had symbolic meaning in a number of West Africa societies. Those who knew the secrets of making iron gained ritual and sometimes political power.
7. The word “profound” in the passage is closest in meaning to
○ fascinating
○ far-reaching
○ necessary
○ temporary
8. The word “ritual” in the passage is closest in meaning to
○ military
○ physical
○ ceremonial
○ permanent
9. According to paragraph 4, all of the following were social effects of the new metal technology in Africa EXCEPT:
○Access to metal tools and weapons created greater social equality.
○Metal weapons increased the power of warriors.
○Iron tools helped increase the food supply.
○Technical knowledge gave religious power to its holders.
Paragraph 5: Unlike in the Americas, where metallurgy was a very late and limited development, Africans had iron from a relatively early date, developing ingenious furnaces to produce the high heat needed for production and to control the amount of air that reached the carbon and iron ore necessary for making iron. Much of Africa moved right into the Iron Age, taking the basic technology and adapting it to local conditions and resources.
10. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
○While American iron makers developed the latest furnaces, African iron makers continued using earlier techniques.
○Africans produced iron much earlier than Americans, inventing technologically sophisticated heating systems.
○Iron making developed earlier in Africa than in the Americas because of the ready availability of carbon and iron ore.
○Both Africa and the Americas developed the capacity for making iron early, but African metallurgy developed at a slower rate.
Paragraph 6: The diffusion of agriculture and later of iron was accompanied by a great movement of people who may have carried these innovations. These people probably originated in eastern Nigeria. Their migration may have been set in motion by an increase in population caused by a movement of peoples fleeing the desiccation, or drying up, of the Sahara. They spoke a language, proto-Bantu (“Bantu” means “the people”), which is the parent tongue of a language of a large number of Bantu languages still spoken throughout sub-Sahara Africa. Why and how these people spread out into central and southern Africa remains a mystery, but archaeologists believe that their iron weapons allowed them to conquer their hunting-gathering opponents, who still used stone implements. Still, the process is uncertain, and peaceful migration-or simply rapid demographic growth-may have also caused the Bantu explosion.
11. The word “fleeing” in the passage is closest in meaning to
○ afraid of
○ displaced by
○ running away from
○ responding to
12. Paragraph 6 mentions all of the following as possible causes of the “Bantu explosion” EXCEPT
○ superior weapons
○ better hunting skills
○ peaceful migration
○ increased population
Paragraph 6: The diffusion of agriculture and later of iron was accompanied by a great movement of people who may have carried these innovations. These people probably originated in eastern Nigeria. ■Their migration may have been set in motion by an increase in population caused by a movement of peoples fleeing the desiccation, or drying up, of the Sahara. ■They spoke a language, proto-Bantu (“Bantu” means “the people”), which is the parent tongue of a language of a large number of Bantu languages still spoken throughout sub-Sahara Africa. Why and how these people spread out into central and southern Africa remains a mystery, but archaeologists believe that their iron weapons allowed them to conquer their hunting-gathering opponents, who still used stone implements. ■Still, the process is uncertain, and peaceful migration-or simply rapid demographic growth-may have also caused the Bantu explosion. ■
13. Look at the four squares ■ that indicate where the following sentence could be added to the passage.
These people had a significant linguistic impact on the continent as well.
Where would the sentence best fit?
14. Direction: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
Agriculture and iron working probably spread to Africa from neighboring regions.
●
●
●
Answer choices
○Once Africans developed their own crops, they no longer borrowed from other regions.
○The harshness of the African climate meant that agriculture could not develop until after the introduction of iron tools.
○The use of livestock improved transportation and trade and allowed for new forms of political control.
○As the Sahara expanded, the camel gained in importance, eventually coming to have religious significance.
○The spread of iron working had far-reaching effects on social, economic, and political organization in Africa.
○Today's Bantu-speaking peoples are descended from a technologically advanced people who spread throughout Africa.
托福TPO7阅读答案Part3
参考答案：
1. ○3
2. ○2
3. ○4
4. ○4
5. ○1
6. ○2
7. ○2
8.○3
9. ○1
10. ○2
11. ○3
12. ○2
13. ○2
14. The use of livestock improved…
The spread of iron working…
Today's Bantu-speaking peoples…
托福TPO7阅读翻译Part3
参考翻译：农业、铁器和班图人
在非洲，早在公元前3 0以前就有了农业的迹象。它可能是独立发展的，但很多学者认为农业和铁器在非洲的传播将非洲与近东的中心和地中海世界联系了起来。就是现在的撒哈拉沙漠地区的不断变得干旱使得很多人向南迁徙到撒哈拉沙漠以南的非洲地区。这些部落起初分散地定居，并仍靠打猎和采集维生，尽管是在靠近湖泊和河流的地区人们以捕鱼为业，有较稳定的食物供给，聚集了较多的人口。农业技术可能来自于近东最终为非洲人所知，因为最初驯化的农作物是起源于西亚而不是非洲的小米和高粱。一旦种植的思想传播开来，非洲人就开始培育他们自己的农作物，比如某些水稻，并且他们一直愿意接受新的外来作物。人们认为驯化非洲作物的地区从埃塞俄比亚一直延伸到苏丹的南部，再到西非。接下来，其他的作物，比如香蕉，就从东南亚传入到非洲了。
家禽也来自于非洲以外的地区。牛是从亚洲引入的，家养绵羊和山羊也可能是这样的。马匹显然是由埃及的Hyksos入侵者(1780-1560B.C.)引入的，之后就从苏丹传到西非。撒哈拉石画表明马匹和马车曾被用于穿越沙漠，并且，在公元前300到200年间，有商队横穿沙哈拉沙漠的路线。西非大草原上的人们使用马匹，后来他们强大的骑兵力量使他们缔造了庞大的帝国。最后，骆驼大约在公元1世纪被引入到非洲。这是一次重要革新，因为骆驼有能力生存在恶劣的沙漠环境，另外，骆驼可以便宜地运输大量的载荷，这使得它们成为了一种方便高效的运输方式。骆驼使得沙漠从障碍转换为一条虽依然艰难但已经更加容易接近的商路和交流通道。
铁器来自于西亚，虽然它传播的路径跟农业技术的不同。大部分非洲表现出一种奇怪的现象，那就是他们社会直接从石器时代进步到铁器时代，而没有经过中间过渡的铜器或青铜器冶金术，尽管在西亚发现了一些早期使用铜器的地区。冶铁技术在差不多到达欧洲的同时，就穿过了森林和大草原到达非洲。在尼日尼亚，加纳和马里发现了制作铁器的证据。
科技的革新对非洲社会的复杂性产生了深刻的改变。铁器代表着力量。在西非的很多社会里，生产工具的铁匠、使土地更多产的铁锄、使战士更强大的铁制武器都有着象征意义。这些对西非社会有着标志性的意义。那些掌握了制铁技术的人们常可获得宗教权力，有时候获得政治权力。
美洲的冶铁技术发展得非常晚，并且有限，而非洲则完全不同，他们的冶铁技术从相对较早的时期就开始发展;他们制造了精巧的高炉以产生冶铁所需要的高温，并能控制与碳和铁矿石接触的空气用量以满足冶铁的需要。大部分非洲人直接进入了铁器时代，他们吸取了冶铁的基本技术并使之与当地的条件和资源相适应。
农业和后来冶铁技术是伴随着那些已经掌握了新技术的人们的大迁徙而传播的。这些人可能来源于尼日尼亚东部。为了逃避撒哈拉沙漠的不断干旱，人们迁徙到尼日尼亚东部，使这里的人口增多，于是这里的人们也接着迁徙。他们所说是前班图语,也就是现在仍然为广泛的撒哈拉沙漠南部非洲人所使用的班图语的源头。这些人为什么扩散到非洲中部和南部?他们怎么迁徙的?仍然是迷。不过考古学家们相信他们的铁制武器足以让他们战胜那些靠采集打猎为生的敌人，因为这些人仍然利用石质工具。不过过程仍然无人知道，另外，和平的移民或者简单的人口增长，都可能导致班图的扩张。
篇5：托福TPO9阅读真题(+答案+翻译)：Part3
1. The phrase “at random” in the passage is closest in meaning to
○finally
○over a long period of time
○successfully
○without a definite pattern
2. It can be inferred from paragraph 2 that the fungi in lichens benefit from their symbiotic relationship with algae in what way?
○The algae help the fungi meet some of their energy needs.
○The algae protect the fungi from the Sun's radiation.
○The algae provide the fungi with greater space for absorbing water.
○The fungi produce less waste in the presence of algae.
3. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
○Some of the earliest important examples of symbiosis-the close cooperation of two or more living things-occur in island communities.
○Symbiosis-the close cooperation of pairs or small groups of living organisms-is especially important in these island environments.
○The first organisms on these islands worked together closely in a relationship known as symbiosis, which is particularly important on islands.
○It is significant to note that organisms in the beginning stages of the development of island life cannot survive without close cooperation.
Paragraph 3: Lichens helped to speed the decomposition of the hard rock surfaces, preparing a soft bed of soil that was abundantly supplied with minerals that had been carried in the molten rock from the bowels of Earth. Now, other forms of life could take hold: ferns and mosses (two of the most ancient types of land plants) that flourish even in rock crevices. These plantspropagate by producing spores-tiny fertilized cells that contain all the instructions for making a new plant-but the spore are unprotected by any outer coating and carry no supply of nutrient. Vast numbers of them fall on the ground beneath the mother plants. Sometimes they are carried farther afield by water or by wind. But only those few spores that settle down in very favorable locations can start new life; the vast majority fall on barren ground. By force of sheer numbers, however, the mosses and ferns reached Hawaii, survived, and multiplied. Some species developed great size, becoming tree ferns that even now grow in the Hawaiian forests.
4. The word “abundantly” in the passage is closest in meaning to
○ occasionally
○ plentifully
○ usefully
○ fortunately
5. The word “propagate” in the passage is closest in meaning to
○ multiply
○ emerge
○ live
○ evolve
6. According to paragraph 3, what was the relationship between lichens and ferns in the development of plant life on Hawaii?
○Ferns were able to grow because lichens created suitable soil.
○The decomposition of ferns produced minerals that were used by lichens.
○Lichens and ferns competed to grow in the same rocky environments.
○Lichens and ferns were typically found together in volcanic areas.
Paragraph 4: Many millions of years after ferns evolved (but long before the Hawaiian Islands were born from the sea), another kind of flora evolved on Earth: the seed-bearing plants. Thiswas a wonderful biological invention. The seed has an outer coating that surrounds the genetic material of the new plant, and inside this covering is a concentrated supply of nutrients. Thus the seed's chances of survival are greatly enhanced over those of the naked spore. One type of seed-bearing plant, the angiosperm, includes all forms of blooming vegetation. In the angiosperm the seeds are wrapped in an additional layer of covering. Some of these coats are hard-like the shell of a nut-for extra protection. Some are soft and tempting, like a peach or a cherry. In some angiosperms the seeds are equipped with gossamer wings, like the dandelion and milkweed seeds. These new characteristics offered better ways for the seed to move to new habitats. They could travel through the air, float in water, and lie dormant for many months.
7. The word “This” in the passage refers to
○the spread of ferns and mosses in Hawaii
○the creation of the Hawaiian Islands
○the evolution of ferns
○the development of plants that produce seeds
8. According to paragraph 4, why do seeds have a greater chance of survival than spores do? To receive credit, you must select TWO answer choices.
○Seeds need less water to grow into a mature plant than spores do.
○Seeds do not need to rely on outside sources of nutrients.
○Seeds are better protected from environmental dangers than spores are.
○Seeds are heavier than spores and are therefore more likely to take root and grow.
9. Why does the author mention “a nut”, “a peach”, and “a cherry”?
○To indicate that some seeds are less likely to survive than others
○To point out that many angiosperms can be eaten
○To provide examples of blooming plants
○To illustrate the variety of coverings among angiosperm seeds
10. The word “dormant” in the passage is closest in meaning to
○hidden
○inactive
○underground
○preserved
Paragraph5: Plants with large, buoyant seeds-like coconuts-drift on ocean currents and are washed up on the shores. Remarkably resistant to the vicissitudes of ocean travel, they can survive prolonged immersion in saltwater when they come to rest on warm beaches and the conditions are favorable, the seed coats soften. Nourished by their imported supply of nutrients, the young plants push out their roots and establish their place in the sun.
11. According to paragraph 5, a major reason that coconuts can establish themselves in distant locations is that their seeds can
○survive long exposure to heat on island beaches
○float and survive for long periods in ocean water
○use saltwater for maintenance and growth
○maintain hard, protective coats even after growing roots
12. According to the passage, which of the following characteristics do spores and seeds have in common?
○They may be surrounded by several layers of covering.
○They are produced by flowering plants.
○They may be spread by wind.
○They are able to grow in barren soils.
Paragraph 3: Lichens helped to speed the decomposition of the hard rock surfaces, preparing a soft bed of soil that was abundantly supplied with minerals that had been carried in the molten rock from the bowels of Earth. Now, other forms of life could take hold: ferns and mosses (two of the most ancient types of land plants) that flourish even in rock crevices. ■These plants propagate by producing spores-tiny fertilized cells that contain all the instructions for making a new plant-but the spore are unprotected by any outer coating and carry no supply of nutrient. ■Vast numbers of them fall on the ground beneath the mother plants. ■Sometimes they are carried farther afield by water or by wind. ■But only those few spores that settle down in very favorable locations can start new life; the vast majority fall on barren ground. By force of sheer numbers, however, the mosses and ferns reached Hawaii, survived, and multiplied. Some species developed great size, becoming tree ferns that even now grow in the Hawaiian forests.
13. Look at the four squares [■] that indicate where the following sentence could be added to the passage.
So since the chances of survival for any individual spore are small, the plants have to produce many spores in order to propagate.
Where could the sentence best fit?
14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some answer choices do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
After the formation of the Hawaiian Islands, much time passed before conditions were suitable for plant life.
●
●
●
Answers Choices
○Algae are classified as symbiotic because they produce energy through the process of photosynthesis.
○The first successful plants on Hawaii were probably lichens, which consist of algae and fungi living in a symbiotic relationship.
○Lichens helped create favorable conditions for the growth of spore-producing plants such as ferns and mosses.
○Seed-bearing plants evolved much later than spore-producing plants, but both types of plants had evolved well before the formation of the Hawaiian Islands.
○Unlike spores, seeds must move to new habitats in order to have a strong chance of survival and growth.
○Seed-bearing plants arrived and spread quickly in Hawaii, thanks to characteristics that increased their seeds' ability to survive and to move to different areas
篇6：托福TPO9阅读真题(+答案+翻译)：Part3
参考答案：
1. ○4
2. ○1
3. ○3
4. ○2
5. ○1
6. ○1
7. ○4
8. ○2, 3
9. ○4
10. ○2
11. ○2
12. ○3
13. ○2
14. The first successful plants…
Lichens helped create favorable…
Seed-bearing plants arrived…
篇7：托福TPO8阅读真题及参考答案Part3
Running Water on Mars
Photographic evidence suggests that liquid water once existed in great quantity on the surface of Mars. Two types of flow features are seen: runoff channels and outflow channels. Runoff channels are found in the southern highlands. These flow features are extensive systems-sometimes hundreds of kilometers in total length-of interconnecting, twisting channels that seem to merge into larger, wider channels. They bear a strong resemblance to river systems on Earth, and geologists think that they are dried-up beds of long-gone rivers that once carried rainfall on Mars from the mountains down into the valleys. Runoff channels on Mars speak of a time 4 billion years ago (the age of the Martian highlands), when the atmosphere was thicker, the surface warmer, and liquid water widespread.
Outflow channels are probably relics of catastrophic flooding on Mars long ago. They appear only in equatorial regions and generally do not form extensive interconnected networks. Instead, they are probably the paths taken by huge volumes of water draining from the southern highlands into the northern plains. The onrushing water arising from these flash floods likely also formed the odd teardrop-shaped “islands” (resembling the miniature versions seen in the wet sand of our beaches at low tide) that have been found on the plains close to the ends of the outflow channels. Judging from the width and depth of the channels, the flow rates must have been truly enormous-perhaps as much as a hundred times greater than the 105 tons per second carried by the great Amazon river. Flooding shaped the outflow channels approximately 3 billion years ago, about the same times as the northern volcanic plains formed.
Some scientists speculate that Mars may have enjoyed an extended early Period during which rivers, lakes, and perhaps even oceans adorned its surface. A Mars Global Surveyor image shows what mission specialists think may be a delta-a fan-shaped network of channels and sediments where a river once flowed into a larger body of water, in this case a lake filling a crater in the southern highlands. Other researchers go even further, suggesting that the data provide evidence for large open expenses of water on the early Martian surface. A computer-generated view of the Martian north polar region shows the extent of what may have been an ancient ocean covering much of the northern lowlands. The Hellas Basin, which measures some 3,000 kilometers across and has a floor that lies nearly 9 kilometers below the basin's rim, is another candidate for an ancient Martian sea.
These ideas remain controversial. Proponents point to features such as the terraced “beaches” shown in one image, which could conceivably have been left behind as a lake or ocean evaporated and the shoreline receded. But detractors maintain that the terraces could also have been created by geological activity, perhaps related to the geologic forces that depressed the Northern Hemisphere far below the level of the south, in which case they have nothing whatever to do with Martian water. Furthermore, Mars Global Surveyor data released in 2003 seem to indicate that the Martian surface contains too few carbonate rock layers-layers containing compounds of carbon and oxygen-that should have been formed in abundance in an ancient ocean. Their absence supports the picture of a cold, dry Mars that never experienced the extended mild period required to form lakes and oceans. However, more recent data imply that at least some parts of the planet did in fact experience long periods in the past during which liquid water existed on the surface.
Aside from some small-scale gullies (channels) found since , which are inconclusive, astronomers have no direct evidence for liquid water anywhere on the surface of Mars today, and the amount of water vapor in the Martian atmosphere is tiny. Yet even setting aside the unproven hints of ancient oceans, the extent of the outflow channels suggests that a huge total volume of water existed on Mars in the past. Where did all the water go? The answer may be that virtually all the water on Mars is now locked in the permafrost layer under the surface, with more contained in the planet's polar caps.
Paragraph 1: Photographic evidence suggests that liquid water once existed in great quantity on the surface of Mars. Two types of flow features are seen: runoff channels and outflow channels. Runoff channels are found in the southern highlands. These flow features are extensive systems-sometimes hundreds of kilometers in total length-of interconnecting, twisting channels that seem to merge into larger, wider channels. They bear a strong resemblance to river systems on Earth, and geologists think that they are dried-up beds of long-gone rivers that once carried rainfall on Mars from the mountains down into the valleys. Runoff channels on Mars speak of a time 4 billion years ago (the age of the Martian highlands), when the atmosphere was thicker, the surface warmer, and liquid water widespread.
篇8：托福TPO8阅读真题及参考答案Part3
1. The word “merge” in the passage is closest in meaning to
○ expand
○ separate
○ straighten out
○ combine
2. What does the discussion in paragraph 1 of runoff channels in the southern highlands suggest about Mars? ○The atmosphere of Mars was once thinner than it is today.
○Large amounts of rain once fell on parts of Mars.
○The river systems of Mars were once more extensive than Earth's.
○The rivers of Mars began to dry up about 4 billion years ago.
Paragraph 2: Outflow channels are probably relics of catastrophic flooding on Mars long ago. They appear only in equatorial regions and generally do not form extensive interconnected networks. Instead, they are probably the paths taken by huge volumes of water draining from the southern highlands into the northern plains. The onrushing water arising from these flash floods likely also formed the odd teardrop-shaped “islands” (resembling the miniature versions seen in the wet sand of our beaches at low tide) that have been found on the plains close to the ends of the outflow channels. Judging from the width and depth of the channels, the flow rates must have been truly enormous-perhaps as much as a hundred times greater than the 105 tons per second carried by the great Amazon river. Flooding shaped the outflow channels approximately 3 billion years ago, about the same times as the northern volcanic plains formed.
3. The word “relics” in the passage is closest in meaning to
○ remains
○ sites
○ requirements
○ sources
4. The word “miniature” in the passage is closest in meaning to
○ temporary
○ small
○ multiple
○ familiar
5. In paragraph 2, why does the author include the information that 105 tons of water flow through the Amazon river per second?
○To emphasize the great size of the volume of water that seems to have flowed through Mars' outflow channels
○To indicate data used by scientists to estimate how long ago Mars' outflow channels were formed
○To argue that flash floods on Mars may have been powerful enough to cause tear-shaped “islands” to form
○To argue that the force of flood waters on Mars was powerful enough to shape the northern volcanic plains
6. According to paragraph 2, all of the following are true of the outflow channels on Mars EXCEPT:
○They formed at around the same time that volcanic activity was occurring on the northern plains.
○They are found only on certain parts of the Martian surface.
○They sometimes empty onto what appear to have once been the wet sands of tidal beaches.
○They are thought to have carried water northward from the equatorial regions.
Paragraph 3: Some scientists speculate that Mars may have enjoyed an extended early Period during which rivers, lakes, and perhaps even oceans adorned its surface. A 2003 Mars Global Surveyor image shows what mission specialists think may be a delta-a fan-shaped network of channels and sediments where a river once flowed into a larger body of water, in this case a lake filling a crater in the southern highlands. Other researchers go even further, suggesting that the data provide evidence for large open expenses of water on the early Martian surface. A computer-generated view of the Martian north polar region shows the extent of what may have been an ancient ocean covering much of the northern lowlands. The Hellas Basin, which measures some 3,000 kilometers across and has a floor that lies nearly 9 kilometers below the basin's rim, is another candidate for an ancient Martian sea.
7. All of the following questions about geological features on Mars are answered in paragraph 3 EXCEPT:
○What are some regions of Mars that may have once been covered with an ocean?
○Where do mission scientists believe that the river forming the delta emptied?
○Approximately how many craters on Mars do mission scientists believe may once have been lakes filled with water?
○During what period of Mars' history do some scientists think it may have had large bodies of water?
8. According to paragraph 3, images of Mars' surface have been interpreted as support for the idea that
○ the polar regions of Mars were once more extensive than they are now
○ a large part of the northern lowlands may once have been under water
○ deltas were once a common feature of the Martian landscape
○ the shape of the Hellas Basin has changed considerably over time
Paragraph 4: These ideas remain controversial. Proponents point to features such as the terraced “beaches” shown in one image, which could conceivably have been left behind as a lake or ocean evaporated and the shoreline receded. But detractors maintain that the terraces could also have been created by geological activity, perhaps related to the geologic forces that depressed the Northern Hemisphere far below the level of the south, in which case they have nothing whatever to do with Martian water. Furthermore, Mars Global Surveyor data released in 2003 seem to indicate that the Martian surface contains too few carbonate rock layers-layers containing compounds of carbon and oxygen-that should have been formed in abundance in an ancient ocean. Their absence supports the picture of a cold, dry Mars that never experienced the extended mild period required to form lakes and oceans. However, more recent data imply that at least some parts of the planet did in fact experience long periods in the past during which liquid water existed on the surface.
9. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
○But detractors argue that geological activity may be responsible for the water associated with the terraces.
○But detractors argue that the terraces may have been formed by geological activity rather than by the presence of water.
○But detractors argue that the terraces may be related to geological forces in the Northern Hemisphere of Mars, rather than to Martian water in the south.
○But detractors argue that geological forces depressed the Northern Hemisphere so far below the level of the south that the terraces could not have been formed by water.
10. According to paragraph 4, what do the 2003 Global Surveyor data suggest about Mars?
○Ancient oceans on Mars contained only small amounts of carbon.
○The climate of Mars may not have been suitable for the formation of large bodies of water.
○Liquid water may have existed on some parts of Mars' surface for long periods of time.
○The ancient oceans that formed on Mars dried up during periods of cold, dry weather.
Paragraph 5: Aside from some small-scale gullies (channels) found since 2000, which are inconclusive, astronomers have no direct evidence for liquid water anywhere on the surface of Mars today, and the amount of water vapor in the Martian atmosphere is tiny. Yet even setting aside the unproven hints of ancient oceans, the extent of the outflow channels suggests that a huge total volume of water existed on Mars in the past. Where did all the water go? The answer may be that virtually all the water on Mars is now locked in the permafrost layer under the surface, with more contained in the planet's polar caps.
11. The word “hints” in the passage is closest in meaning to
○ clues
○ features
○ arguments
○ effects
Paragraph 2: Outflow channels are probably relics of catastrophic flooding on Mars long ago. ■They appear only in equatorial regions and generally do not form extensive interconnected networks. ■Instead, they are probably the paths taken by huge volumes of water draining from the southern highlands into the northern plains. ■The onrushing water arising from these flash floods likely also formed the odd teardrop-shaped “islands” (resembling the miniature versions seen in the wet sand of our beaches at low tide) that have been found on the plains close to the ends of the outflow channels. ■Judging from the width and depth of the channels, the flow rates must have been truly enormous-perhaps as much as a hundred times greater than the 105 tons per second carried by the great Amazon river. Flooding shaped the outflow channels approximately 3 billion years ago, about the same times as the northern volcanic plains formed.
12. Look at the four squares [■] that indicate where the following sentence could be added to the passage.
These landscape features differ from runoff channels in a number of ways.
Where would the sentence best fit?
13. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
There is much debate concerning whether Mars once had water.
●
●
●
Answer choices
○Mars' runoff and outflow channels are large-scale, distinctive features that suggest that large quantities of liquid water once flowed on Mars.
○Although some researchers claim that Mars may once have had oceans, others dispute this, pointing to an absence of evidence or offering alternative interpretations of evidence.
○Various types of images have been used to demonstrate that most of Martian surface contains evidence of flowing water.
○The runoff and outflow channels of Mars apparently carried a higher volume of water and formed more extensive networks than do Earth's river systems.
○There is very little evidence of liquid water on Mars today, and it is assumed that all the water that once existed on the planet is frozen beneath its surface.
○While numerous gullies have been discovered on Mars since 2000, many astronomers dismiss them as evidence that Mars once had liquid water
篇9：托福TPO8阅读真题及参考答案Part3
参考翻译：火星上的流水
来自照片的证据显示在火星的表面曾有过大量的液态水。两种流动形式已经被发现：径流通道和外流通道。径流通道发现于南部的高地。这些流动形式有着庞大的系统--有时竟有数百千米长--这些通道相互交错、扭转，并可能汇入更大更宽的通道中。它们和地球上的河流系统非常相似，地质学家们认为它们是以前曾将火星上的雨水从高山携带到峡谷中的那些河流干涸后的遗迹。火星上的径流通道存在于40亿年以前(就是火星高地的年龄)，那时候火星的大气层更厚，地表更暖和，并且液态水分布很广。
外流通道可能是很久以前火星上洪灾的遗迹。它们只形成于赤道附近，并一般没有形成广泛的交错的网络。相反，它们可能是携带大量水从南部高地到北部平原的排水系统。由泛滥的洪水而产生的激流可能也形成奇怪的泪滴状小岛(就像是在低潮时湿沙地或海滩上看到的缩小版本一样)，已经在靠近出流通道末尾处的平原上被看到。从这些通道的宽度和深度可判断，当时流速一定很大--有可能是亚马逊河的每秒钟105吨的流量的一百多倍。大约在30亿年以前，北部火山平原形成的同时，洪水改变了外流通道的形状。
一些科学家认为早期的火星上广泛存在着河流，湖泊甚至是海洋。一份的对火星全球的调查照片显示了一个科学家们认为是三角洲的构造--一个扇形的沉积物和水流通道的网络，河流可能是从这里流入了一个更大的水体;在这种情况下，它可能是南部高地的一个火山口湖泊。其他研究者做了更大胆的猜测，他们认为那些数据表明早期在火星表面存在大量的水。一张关于火星北部极地地区的电脑图片说明有可能有一个古老的海洋覆盖了大部分北部的低洼处。那座有大约3 000公里宽，9公里深的希腊盆地也可能是火星海洋。
这些观点仍然有争议。支持者们指出照片里显示的台地“海滩”可以是由湖泊或者海洋蒸发干涸之后或者海退之后形成的。但是反对者认为这些台地也可能是由于地质活动造成的，也许与使得北半球比南半球地势更低的地质力量有关，在这种情况下，它们就和火星水系没有任何关系。而且，发布的火星全球调查数据也表明火星表面含有太少的碳化岩层--含有碳氧化合物的岩层--它们应该是在古代海洋中大量形成的。这些岩层的缺失支持了火星是一个又冷又干燥的星球这一说法，并且不可能拥有形成湖泊和海洋的温和气候。然而，更新的数据表明至少该星球上的一些部分表面的确在过去的很长时间内存在液态水。
除了在发现了一些小规模的、不确定的溪谷以外，宇航员到目前为止还没有在星球的什么地方找到液态水存在的直接证据。而且火星大气中的水蒸气的含量也是微乎其微的。然而就算不考虑尚未证明的古代海洋存在的观点，出流通道的广泛存在就足以证明在火星上曾有大量的水体，水都去了哪里呢?答案可能是火星上所有的水实际上现在已经封存在其地下的永久冻层中，并且在极地地区最多。
篇10：托福TPO3阅读真题原文及答案翻译Part3
The Long-Term Stability of Ecosystems
Plant communities assemble themselves flexibly, and their particular structure depends on the specific history of the area. Ecologists use the term “succession” to refer to the changes that happen in plant communities and ecosystems over time. The first community in a succession is called a pioneer community, while the long-lived community at the end of succession is called a climax community. Pioneer and successional plant communities are said to change over periods from 1 to 500 years. These changes-in plant numbers and the mix of species-are cumulative. Climax communities themselves change but over periods of time greater than about 500 years.
An ecologist who studies a pond today may well find it relatively unchanged in a year's time. Individual fish may be replaced, but the number of fish will tend to be the same from one year to the next. We can say that the properties of an ecosystem are more stable than the individual organisms that compose the ecosystem.
At one time, ecologists believed that species diversity made ecosystems stable. They believed that the greater the diversity the more stable the ecosystem. Support for this idea came from the observation that long-lasting climax communities usually have more complex food webs and more species diversity than pioneer communities. Ecologists concluded that the apparent stability of climax ecosystems depended on their complexity. To take an extreme example, farmlands dominated by a single crop are so unstable that one year of bad weather or the invasion of a single pest can destroy the entire crop. In contrast, a complex climax community, such as a temperate forest, will tolerate considerable damage from weather to pests.
The question of ecosystem stability is complicated, however. The first problem is that ecologists do not all agree what “stability” means. Stability can be defined as simply lack of change. In that case, the climax community would be considered the most stable, since, by definition, it changes the least over time. Alternatively, stability can be defined as the speed with which an ecosystem returns to a particular form following a major disturbance, such as a fire. This kind of stability is also called resilience. In that case, climax communities would be the most fragile and the least stable, since they can require hundreds of years to return to the climax state.
Even the kind of stability defined as simple lack of change is not always associated with maximum diversity. At least in temperate zones, maximum diversity is often found in mid-successional stages, not in the climax community. Once a redwood forest matures, for example, the kinds of species and the number of individuals growing on the forest floor are reduced. In general, diversity, by itself, does not ensure stability. Mathematical models of ecosystems likewise suggest that diversity does not guarantee ecosystem stability-just the opposite, in fact. A more complicated system is, in general, more likely than a simple system to break down. A fifteen-speed racing bicycle is more likely to break down than a child's tricycle.
Ecologists are especially interested to know what factors contribute to the resilience of communities because climax communities all over the world are being severely damaged or destroyed by human activities. The destruction caused by the volcanic explosion of Mount St. Helens, in the northwestern United States, for example, pales in comparison to the destruction caused by humans. We need to know what aspects of a community are most important to the community's resistance to destruction, as well as its recovery.
Many ecologists now think that the relative long-term stability of climax communities comes not from diversity but from the “patchiness” of the environment, an environment that varies from place to place supports more kinds of organisms than an environment that is uniform. A local population that goes extinct is quickly replaced by immigrants from an adjacent community. Even if the new population is of a different species, it can approximately fill the niche vacated by the extinct population and keep the food web intact.
Paragraph 1: Plant communities assemble themselves flexibly, and their particular structure depends on the specific history of the area. Ecologists use the term “succession” to refer to the changes that happen in plant communities and ecosystems over time. The first community in a succession is called a pioneer community, while the long-lived community at the end of succession is called a climax community. Pioneer and successional plant communities are said to change over periods from 1 to 500 years. These changes-in plant numbers and the mix of species-are cumulative. Climax communities themselves change but over periods of time greater than about 500 years.
托福TPO3阅读真题题目Part3
1. The word “particular” in the passage is closest in meaning to
○natural
○final
○specific
○complex
2. According to paragraph 1, which of the following is NOT true of climax communities?
○They occur at the end of a succession.
○They last longer than any other type of community.
○The numbers of plants in them and the mix of species do not change.
○They remain stable for at least 500 years at a time.
Paragraph 2: An ecologist who studies a pond today may well find it relatively unchanged in a year's time. Individual fish may be replaced, but the number of fish will tend to be the same from one year to the next. We can say that the properties of an ecosystem are more stable than the individual organisms that compose the ecosystem.
3. According to paragraph 2, which of the following principles of ecosystems can be learned by studying a pond?
○Ecosystem properties change more slowly than individuals in the system.
○The stability of an ecosystem tends to change as individuals are replaced.
○Individual organisms are stable from one year to the next.
○A change in the members of an organism does not affect an ecosystem's properties.
Paragraph 3: At one time, ecologists believed that species diversity made ecosystems stable. They believed that the greater the diversity the more stable the ecosystem. Support for this idea came from the observation that long-lasting climax communities usually have more complex food webs and more species diversity than pioneer communities. Ecologists concluded that the apparent stability of climax ecosystems depended on their complexity. To take an extreme example, farmlands dominated by a single crop are so unstable that one year of bad weather or the invasion of a single pest can destroy the entire crop. In contrast, a complex climax community, such as a temperate forest, will tolerate considerable damage from weather to pests.
4. According to paragraph 3, ecologists once believed that which of the following illustrated the most stable ecosystems?
○Pioneer communities
○Climax communities
○Single-crop farmlands
○Successional plant communities
Paragraph 4: The question of ecosystem stability is complicated, however. The first problem is that ecologists do not all agree what “stability” means. Stability can be defined as simply lack of change. In that case, the climax community would be considered the most stable, since, by definition, it changes the least over time. Alternatively, stability can be defined as the speed with which an ecosystem returns to a particular form following a major disturbance, such as a fire. This kind of stability is also called resilience. In that case, climax communities would be the most fragile and the least stable, since they can require hundreds of years to return to the climax state.
5. According to paragraph 4, why is the question of ecosystem stability complicated?
○The reasons for ecosystem change are not always clear.
○Ecologists often confuse the word “stability” with the word “resilience.”
○The exact meaning of the word “stability” is debated by ecologists.
○There are many different answers to ecological questions.
6. According to paragraph 4, which of the following is true of climax communities?○They are more resilient than pioneer communities.
○They can be considered both the most and the least stable communities.
○They are stable because they recover quickly after major disturbances.
○They are the most resilient communities because they change the least over time.
Paragraph 5: Even the kind of stability defined as simple lack of change is not always associated with maximum diversity. At least in temperate zones, maximum diversity is often found in mid-successional stages, not in the climax community. Once a redwood forest matures, for example, the kinds of species and the number of individuals growing on the forest floor are reduced. In general, diversity, by itself, does not ensure stability. Mathematical models of ecosystems likewise suggest that diversity does not guarantee ecosystem stability-just the opposite, in fact. A more complicated system is, in general, more likely than a simple system to break down. A fifteen-speed racing bicycle is more likely to break down than a child's tricycle.
7. Which of the following can be inferred from paragraph 5 about redwood forests?
○They become less stable as they mature.
○They support many species when they reach climax.
○They are found in temperate zones.
○They have reduced diversity during mid-successional stages.
8. The word “guarantee” in the passage is closest in meaning to
○increase
○ensure
○favor
○complicate
9. In paragraph 5, why does the author provide the information that “A fifteen-speed racing bicycle is more likely to break down than a child's tricycle”?
○To illustrate a general principle about the stability of systems by using an everyday example
○To demonstrate that an understanding of stability in ecosystems can be applied to help understand stability in other situations
○To make a comparison that supports the claim that, in general, stability increases with diversity
○To provide an example that contradicts mathematical models of ecosystems
Paragraph 6: Ecologists are especially interested to know what factors contribute to the resilience of communities because climax communities all over the world are being severely damaged or destroyed by human activities. The destruction caused by the volcanic explosion of Mount St. Helens, in the northwestern United States, for example, pales in comparison to the destruction caused by humans. We need to know what aspects of a community are most important to the community's resistance to destruction, as well as its recovery.
10. The word “pales” in the passage is closest in meaning to
○increases proportionally
○differs
○loses significance
○is common
Paragraph 7: Many ecologists now think that the relative long-term stability of climax communities comes not from diversity but from the “patchiness” of the environment, an environment that varies from place to place supports more kinds of organisms than an environment that is uniform. A local population that goes extinct is quickly replaced by immigrants from an adjacentcommunity. Even if the new population is of a different species, it can approximately fill the niche vacated by the extinct population and keep the food web intact.
11.Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incurred choices change the meaning in important ways or leave out essential information.
○Ecologists now think that the stability of an environment is a result of diversity rather than patchiness.
○Patchy environments that vary from place to place do not often have high species diversity.
○Uniform environments cannot be climax communities because they do not support as many types of organisms as patchy environments.
○A patchy environment is thought to increase stability because it is able to support a wide variety of organisms.
12.The word “adjacent” in the passage is closest in meaning to
○foreign
○stable
○fluid
○neighboring
Paragraph 6: █Ecologists are especially interested to know what factors contribute to the resilience of communities because climax communities all over the world are being severely damaged or destroyed by human activities. █The destruction caused by the volcanic explosion of Mount St. Helens, in the northwestern United States, for example, pales in comparison to the destruction caused by humans. █We need to know what aspects of a community are most important to the community's resistance to destruction, as well as its recovery. █
13.Look at the four squares [█] that indicate where the following sentence could be added to the passage.
In fact, damage to the environment by humans is often much more severe than damage by natural events and processes.
Where would the sentence best fit? Click on a square to add the sentence to the passage.
14.Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
The process of succession and the stability of a climax community can change over time.
●
●
●
Answer choices
○The changes that occur in an ecosystem from the pioneer to the climax community can be seen in one human generation.
○A high degree of species diversity does not always result in a stable ecosystem.
○The level of resilience in a plant community contributes to its long-term stability.
○Ecologists agree that climax communities are the most stable types of ecosystems.
○Disagreements over the meaning of the term “stability” make it difficult to identify the most stable ecosystems.
○The resilience of climax communities makes them resistant to destruction caused by humans
篇11：托福阅读真题及答案
北美地区6月8日托福考试真题回忆
206月8日北美地区托福考试都考了哪些题目?以下是年6月8日北美地区托福真题，大家可以练习使用。
托福机经阅读
我遇到了加试，还不是经典加试，人品差哇。
有一篇是讲地球的形成的，先讲了星球大概形成的一个过程。然后具体说了地球内部的硅浮上来，重物质下去。还讲了地幔和地壳的形成。然后还有什么一开始是一些神马物质，后来这些物质就走掉了，还有水汽，还有其他氢啊神马的进来，然后形成最终状态。
有个著名的帝国破灭了，分成了东和西。然后东比较好，需要防卫的边界线不是很多，还有很多资源;西的话就比较悲惨，要各种防卫，内忧外患。还有西的话君主特别年轻，8岁和5岁还是神马的就登基了，然后权臣当道，等他们成年了，也没有发言权了。然后就说很多人都是为了自己的利益来的，牺牲民众的利益，外敌就入侵了。
还有一篇讲一个国家内战求民主，但是结果很不理想，想要的木有达到。穷苦民众无力去撼动大地主的利益，然后教堂啥的影响很小，商人首创严重，大地主反而获利很大。还讲了这个国家对周边国家的一些影响，有些国家出乎意料还从中受益了。
还有一篇一点印象都木有了!
托福机经听力
有一道是去找教授的，我没听太清楚。姑娘写了篇论文，和教授分析自己的论文。貌似选择的题目是和网络还有杂志相关的，我没听清楚到底是网络对纸质媒介的影响，还是网络规范的制定神马的，这里有题目的。姑娘说自己找了很多资料，教授表示挺惊讶的，估计觉着资料很难找。然后姑娘天马行空，想写的东西特别多，还想比较1970年的和现在的情况。教授让她不要弄那么大的题目，最后她绝对专注于目前。
还有一篇是讲一个男孩选了两门生物课，一门钢琴课。然后导师劝他放弃其中一门课。男孩说自己非常喜欢生物，也很爱音乐，但是自己确实没有那么多的时间，每天两个小时的弹琴也没有能保证。导师也说他是个很好的学生，但是最近的成绩确实不够理想。让他想清楚自己到底想做神马。学校里有选不同方向的学生，但是他们一般两个方向都是相关的。她问男孩是不是想弹钢琴去讲生物神马的。男孩一开始不肯放弃，后来被劝着劝着觉着导师挺有道理的，决定回家仔细想想放弃哪一门。
有一篇讲百老汇的。说18x.x年有一个新的方式出现了。那段时间新兴了很多中产阶级，需要娱乐，这里有题。新出来的和普通的不一样，有很多新点子，引入了芭蕾神马的，还全美巡演，还有移动舞台，给观众全新的体验。
还有一篇讲电影的，教授说这些名字你们都很熟悉吧，但是你们不一定知道全部的信息。然后就具体讲了迪士尼的动画。说了其中一部，非常重要，重要的原因貌似是第一部盈利的，这里有题。然后讲了一个拍摄的新技巧，说镜头拉近，附近的东西会变大，树啊栅栏啊啥的都变大了，但是太阳不会变大。这个就挺难弄的，如果让画家画的话太费力了。然后有个人去看了部舞台剧，舞台剧是有背景的，给了灵感，这里有题。然后就弄了滤片啥的在相机里拍摄，就解决问题啦。
托福机经口语
1、有三个了解大学的选择
a. 周末学校一日游
b. 周末两天在playground玩
c. 参加大学的课程
问选择哪种去最好的了解学校
2、有人送了一块地，问是用来养花种菜呢还是建儿童游乐园
3、阅读：有人给学校写了封建议信，刊登在学校的报纸上。学校附近有一个小咖啡厅兮兮的东西，提供饮料和小cookie。这是非常好的，但是有两个建议，一个是提供一些耐吃的食物，三明治神马的;一个是建议多一些轻音乐。
对话：一男一女，女孩说觉得这个建议非常赞啊。说那里是休息的一个好地方，吃点东西神马的太便利了。但是饿的时候小cookie木有用，确实需要一些其他的吃的;然后音乐太吵了，自己在那里完全没有办法看书，只能回宿舍。
4、阅读：一个协同作战之类的词，讲动物之间一般会一起做一样的事情。而且协同作战还会让他们更团结，抵抗外敌。
听力：教授举了某种动物做例子，说在迁徙的时候，如果一只口渴停下来喝水，其他不渴的也会停下来喝，喝完再一起继续迁徙。为嘛他们要一起呢，因为在dry open grass上有很危险的敌人，有狮子神马的。如果单独行动太危险了，很有可能丧命。
5、一男一女对话。男孩很苦恼，遇到问题了。他现在住的屋子的房东准备把屋子卖了，然后有个看上的买家非常着急要买，他还有一周多一些的时间可以搬家。他现在有两个选择方案，一个是他的朋友在学校附近有个屋子在招租，但是他觉着这样他就没法定下心来学习了;还有就是和父母住一起，但是父母住的地方忒远了。很难抉择。
6、有关动物的。说动物有两个适应特性，一个是Physical适应，一个是habit适应还是神马的。讲了一个动物在极度寒冷的地方，为了保持自身的热量如何很好地用两种方法来适应。一个是他们的颜色是黑色的，黑色能吸收更多的太阳光，热量传到身体里面。一个是它们平时站在冰块上，于是它们采取不同于寻常的站立方式，木有用两只脚，而是用了脚后跟。
托福机经写作
1、阅读材料
科学家们和在两个相隔1500Mile的地方发现一个我不认识的物种，这个动物正常情况下是黑色带有少许白色斑点，结果两次发现的是全白色的，这个发现非常神奇。但是科学家们仔细分析了下，说这两个东西不是同一物种，并从三个方面给出了分析。
a. 轻微的颜色差异：第一次非常白，第二次微白;
b. 相隔太远：两次相隔了1500mile，他们在岸边不会走这么远;
c. 年龄估计：第一次估计是20岁，那就意味着第二次得要30岁，科学家表示不太可能，我没太能弄懂这个的意思，但是就是这么说的。
综上所述，这两个物种不是同一个。
听力材料
教授的观点是认为他们是同一个物种，从三点分别驳斥了这些科学家的观点
a. 这个生物生活的地方会长貌似是藻类alga,然后这个藻类不同季节的生长情况不太一样。不同季节会对这个动物的颜色有一定的影响，有可能白还是不白时候是被这个藻类覆盖了。
b. 这个生物按生活习性分为两类，一类是hunting，一类是fishing，有可能被发现的是fishing的，它待在冰上，随着冰漂移mi也是很容易滴，所以在这两个地方发现同一个是很有可能的。
c. 年龄有可能被预估错误了，这个生物到20岁以后就没啥变化了，20岁和30岁长得很像的。科学家认为是20岁，万一是25捏?反正就是年龄预估这事不靠谱。
综上所述，教授认为，很有可能是同一个物种
2、有些人认为成绩应该由许多小assignment的成绩综合，有些人认为应该1-2次大成绩。写出自己的观点，并给出案例和分析。
托福阅读真题及答案
Timberline Vegetation on Mountains
The transition from forest to treeless tundra on a mountain slope is often a dramatic one. Within a vertical distance of just a few tens of meters, trees disappear as a life-form and are replaced by low shrubs, herbs, and grasses. This rapid zone of transition is called the upper timberline or tree line. In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture.
The upper timberline, like the snow line, is highest in the tropics and lowest in the Polar Regions. It ranges from sea level in the Polar Regions to 4,500 meters in the dry subtropics and 3,500-4,500 meters in the moist tropics. Timberline trees are normally evergreens, suggesting that these have some advantage over deciduous trees (those that lose their leaves) in the extreme environments of the upper timberline. There are some areas, however, where broadleaf deciduous trees form the timberline. Species of birch, for example, may occur at the timberline in parts of the Himalayas.
At the upper timberline the trees begin to become twisted and deformed. This is particularly true for trees in the middle and upper latitudes, which tend to attain greater heights on ridges, whereas in the tropics the trees reach their greater heights in the valleys. This is because middle- and upper- latitude timberlines are strongly influenced by the duration and depth of the snow cover. As the snow is deeper and lasts longer in the valleys, trees tend to attain greater heights on the ridges, even though they are more exposed to high-velocity winds and poor, thin soils there. In the tropics, the valleys appear to be more favorable because they are less prone to dry out, they have less frost, and they have deeper soils.
There is still no universally agreed-on explanation for why there should be such a dramatic cessation of tree growth at the upper timberline. Various environmental factors may play a role. Too much snow, for example, can smother trees, and avalanches and snow creep can damage or destroy them. Late-lying snow reduces the effective growing season to the point where seedlings cannot establish themselves. Wind velocity also increases with altitude and may cause serious stress for trees, as is made evident by the deformed shapes at high altitudes. Some scientists have proposed that the presence of increasing levels of ultraviolet light with elevation may play a role, while browsing and grazing animals like the ibex may be another contributing factor. Probably the most important environmental factor is temperature, for if the growing season is too short and temperatures are too low, tree shoots and buds cannot mature sufficiently to survive the winter months.
Above the tree line there is a zone that is generally called alpine tundra. Immediately adjacent to the timberline, the tundra consists of a fairly complete cover of low-lying shrubs, herbs, and grasses, while higher up the number and diversity of species decrease until there is much bare ground with occasional mosses and lichens and some prostrate cushion plants. Some plants can even survive in favorable microhabitats above the snow line. The highest plants in the world occur at around 6,100 meters on Makalu in the Himalayas. At this great height, rocks, warmed by the sun, melt small snowdrifts.
The most striking characteristic of the plants of the alpine zone is their low growth form. This enables them to avoid the worst rigors of high winds and permits them to make use of the higher temperatures immediately adjacent to the ground surface. In an area where low temperatures are limiting to life, the importance of the additional heat near the surface is crucial. The low growth form can also permit the plants to take advantage of the insulation provided by a winter snow cover. In the equatorial mountains the low growth form is less prevalent.
Paragraph 1: The transition from forest to treeless tundra on a mountain slope is often a dramatic one. Within a vertical distance of just a few tens of meters, trees disappear as a life-form and are replaced by low shrubs, herbs, and grasses. This rapid zone of transition is called the upper timberline or tree line. In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture.
1. The word “dramatic” in the passage is closest in meaning to
○gradual
○complex
○visible
○striking
2. Where is the lower timberline mentioned in paragraph 1 likely to be found?
○In an area that has little water
○In an area that has little sunlight
○Above a transition area
○On a mountain that has on upper timberline.
3. Which of the following can be inferred from paragraph 1 about both the upper and lower timberlines?
○Both are treeless zones.
○Both mark forest boundaries.
○Both are surrounded by desert areas.
○Both suffer from a lack of moisture.
Paragraph 2: The upper timberline, like the snow line, is highest in the tropics and lowest in the Polar Regions. It ranges from sea level in the Polar Regions to 4,500 meters in the dry subtropics and 3,500-4,500 meters in the moist tropics. Timberline trees are normally evergreens, suggesting that these have some advantage over deciduous trees (those that lose their leaves) in the extreme environments of the upper timberline. There are some areas, however, where broadleaf deciduous trees form the timberline. Species of birch, for example, may occur at the timberline in parts of the Himalayas.
4. Paragraph 2 supports which of the following statements about deciduous trees?
○They cannot grow in cold climates.
○They do not exist at the upper timberline.
○They are less likely than evergreens to survive at the upper timberline.
○They do not require as much moisture as evergreens do.
Paragraph 3: At the upper timberline the trees begin to become twisted and deformed. This is particularly true for trees in the middle and upper latitudes, which tend to attain greater heights on ridges, whereas in the tropics the trees reach their greater heights in the valleys. This is because middle- and upper- latitude timberlines are strongly influenced by the duration and depth of the snow cover. As the snow is deeper and lasts longer in the valleys, trees tend to attain greater heights on the ridges, even though they are more exposed to high-velocity winds and poor, thin soils there. In the tropics, the valleys appear to be more favorable because they are less prone to dry out, they have less frost, and they have deeper soils.
5. The word “attain” in the passage is closest in meaning to
○require
○resist
○achieve
○endure
6. The word “they” in the passage refers to
○valleys
○trees
○heights
○ridges
7. The word “prone” in the passage is closest in meaning to，bj.xhd.cn/toefl/来源：北京新航道托福培训
○adapted
○likely
○difficult
○resistant
8. According to paragraph 3, which of the following is true of trees in the middle and upper latitudes?
○Tree growth is negatively affected by the snow cover in valleys.
○Tree growth is greater in valleys than on ridges.
○Tree growth on ridges is not affected by high-velocity winds.
○Tree growth lasts longer in those latitudes than it does in the tropics.
Paragraph 4：There is still no universally agreed-on explanation for why there should be such a dramatic cessation of tree growth at the upper timberline. Various environmental factors may play a role. Too much snow, for example, can smother trees, and avalanches and snow creep can damage or destroy them. Late-lying snow reduces the effective growing season to the point where seedlings cannot establish themselves. Wind velocity also increases with altitude and may cause serious stress for trees, as is made evident by the deformed shapes at high altitudes. Some scientists have proposed that the presence of increasing levels of ultraviolet light with elevation may play a role, while browsing and grazing animals like the ibex may be another contributing factor. Probably the most important environmental factor is temperature, for if the growing season is too short and temperatures are too low, tree shoots and buds cannot mature sufficiently to survive the winter months.
9. Which of the sentences below best express the essential information in the highlighted sentence in the passage? In correct choices change the meaning in important ways or leave out essential information.
○Because of their deformed shapes at high altitudes, trees are not likely to be seriously harmed by the strong winds typical of those altitudes.
○As altitude increases, the velocity of winds increase, leading to a serious decrease in the number of trees found at high altitudes.
○The deformed shapes of trees at high altitudes show that wind velocity, which increase with altitude, can cause serious hardship for trees.
○Increased wind velocity at high altitudes deforms the shapes of trees, and this may cause serious stress for trees.
10. In paragraph 4, what is the author’s main purpose in the discussion of the dramatic cessation of tree growth at the upper timberline?
○To argue that none of several environment factors that are believed to contribute to that phenomenon do in fact play a role in causing it.
○To argue in support of one particular explanation of that phenomenon against several competing explanations
○To explain why the primary environmental factor responsible for that phenomenon has not yet been identified
○To present several environmental factors that may contribute to a satisfactory explanation of that phenomenon
Paragraph 6: The most striking characteristic of the plants of the alpine zone is their low growth form. This enables them to avoid the worst rigors of high winds and permits them to make use of the higher temperatures immediately adjacent to the ground surface. In an area where low temperatures are limiting to life, the importance of the additional heat near the surface is crucial. The low growth form can also permit the plants to take advantage of the insulation provided by a winter snow cover. In the equatorial mountains the low growth form is less prevalent.
11. The word “prevalent” in the passage is closest in meaning to
○predictable
○widespread
○successful
○developed
12. According to paragraph 6, all of the following statements are true of plants in the alpine zone EXCEPT:
○Because they are low, they are less exposed to strong winds.
○Because they are low, the winter snow cover gives them more protection from the extreme cold.
○In the equatorial mountains, they tend to be lower than in mountains elsewhere.
○Their low growth form keeps them closer to the ground, where there is more heat than further up.
Paragraph 5: Above the tree line there is a zone that is generally called alpine tundra. █Immediately adjacent to the timberline, the tundra consists of a fairly complete cover of low-lying shrubs, herbs, and grasses, while higher up the number and diversity of species decrease until there is much bare ground with occasional mosses and lichens and some prostrate cushion plants. █Some plants can even survive in favorable microhabitats above the snow line. The highest plants in the world occur at around 6,100 meters on Makalu in the Himalayas. █At this great height, rocks, warmed by the sun, melt small snowdrifts. █
13. Look at the four squares [█] that indicate where the following sentence could be added to the passage.
This explains how, for example, alpine cushion plants have been found growing at an altitude of 6,180 meters.
Where would the sentence best fit?
14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
At the timberline, whether upper or lower, there is a profound change in the growth of trees and other plants.
Answer choices
○Birch is one of the few species of tree that can survive in the extreme environments of the upper timberline.
○There is no agreement among scientists as to exactly why plant growth is sharply different above and below the upper timberline.
○The temperature at the upper timberline is probably more important in preventing tree growth than factors such as the amount of snowfall or the force of winds.
○The geographical location of an upper timberline has an impact on both the types of trees found there and their physical characteristics.
○High levels of ultraviolet light most likely play a greater role in determining tree growth at the upper timberline than do grazing animals such as the ibex.
○Despite being adjacent to the timberline, the alpine tundra is an area where certain kinds of low trees can endure high winds and very low temperatures.
参考答案：
1. ○4
2. ○1
3. ○2
4. ○3
5. ○3
6. ○2
7. ○2
8. ○1
9. ○3
10. ○4
11. ○2
12. ○3
13. ○4
14. There is no agreement among…
The temperature at the upper …
The geographical location of…
托福阅读真题及答案
The Origins of Theater
In seeking to describe the origins of theater, one must rely primarily on speculation, since there is little concrete evidence on which to draw. The most widely accepted theory, championed by anthropologists in the late nineteenth and early twentieth centuries, envisions theater as emerging out of myth and ritual. The process perceived by these anthropologists may be summarized briefly. During the early stages of its development, a society becomes aware of forces that appear to influence or control its food supply and well-being. Having little understanding of natural causes, it attributes both desirable and undesirable occurrences to supernatural or magical forces, and it searches for means to win the favor of these forces. Perceiving an apparent connection between certain actions performed by the group and the result it desires, the group repeats, refines and formalizes those actions into fixed ceremonies, or rituals.
Stories (myths) may then grow up around a ritual. Frequently the myths include representatives of those supernatural forces that the rites celebrate or hope to influence. Performers may wear costumes and masks to represent the mythical characters or supernatural forces in the rituals or in accompanying celebrations. As a person becomes more sophisticated, its conceptions of supernatural forces and causal relationships may change. As a result, it may abandon or modify some rites. But the myths that have grown up around the rites may continue as part of the group’s oral tradition and may even come to be acted out under conditions divorced from these rites. When this occurs, the first step has been taken toward theater as an autonomous activity, and thereafter entertainment and aesthetic values may gradually replace the former mystical and socially efficacious concerns.
Although origin in ritual has long been the most popular, it is by no means the only theory about how the theater came into being. Storytelling has been proposed as one alternative. Under this theory, relating and listening to stories are seen as fundamental human pleasures. Thus, the recalling of an event (a hunt, battle, or other feat) is elaborated through the narrator’s pantomime and impersonation and eventually through each role being assumed by a different person.
A closely related theory sees theater as evolving out of dances that are primarily pantomimic, rhythmical or gymnastic, or from imitations of animal noises and sounds. Admiration for the performer’s skill, virtuosity, and grace are seen as motivation for elaborating the activities into fully realized theatrical performances.
In addition to exploring the possible antecedents of theater, scholars have also theorized about the motives that led people to develop theater. Why did theater develop, and why was it valued after it ceased to fulfill the function of ritual? Most answers fall back on the theories about the human mind and basic human needs. One, set forth by Aristotle in the fourth century B.C., sees humans as naturally imitative—as taking pleasure in imitating persons, things, and actions and in seeing such imitations. Another, advanced in the twentieth century, suggests that humans have a gift for fantasy, through which they seek to reshape reality into more satisfying forms than those encountered in daily life. Thus, fantasy or fiction (of which drama is one form) permits people to objectify their anxieties and fears, confront them, and fulfill their hopes in fiction if not fact. The theater, then, is one tool whereby people define and understand their world or escape from unpleasant realities.
But neither the human imitative instinct nor a penchant for fantasy by itself leads to an autonomous theater. Therefore, additional explanations are needed. One necessary condition seems to be a somewhat detached view of human problems. For example, one sign of this condition is the appearance of the comic vision, since comedy requires sufficient detachment to view some deviations from social norms as ridiculous rather than as serious threats to the welfare of the entire group. Another condition that contributes to the development of autonomous theater is the emergence of the aesthetic sense. For example, some early societies ceased to consider certain rites essential to their well-being and abandoned them, nevertheless, they retained as parts of their oral tradition the myths that had grown up around the rites and admired them for their artistic qualities rather than for their religious usefulness.
Paragraph 1: In seeking to describe the origins of theater, one must rely primarily on speculation, since there is little concrete evidence on which to draw. The most widely accepted theory, championed by anthropologists in the late nineteenth and early twentieth centuries, envisions theater as emerging out of myth and ritual. The process perceived by these anthropologists may be summarized briefly. During the early stages of its development, a society becomes aware of forces that appear to influence or control its food supply and well-being. Having little understanding of natural causes, it attributes both desirable and undesirable occurrences to supernatural or magical forces, and it searches for means to win the favor of these forces. Perceiving an apparent connection between certain actions performed by the group and the result it desires, the group repeats, refines and formalizes those actions into fixed ceremonies, or rituals.
1. The word “championed” in the passage is closest in meaning to
○changed
○debated
○created
○supported
2. The word “attributes” in the passage is closest in meaning to
○ascribes
○leaves
○limits
○contrasts
3. According to paragraph 1, theories of the origins of theater
○are mainly hypothetical
○are well supported by factual evidence
○have rarely been agreed upon by anthropologists
○were expressed in the early stages of theater’s development
4. According to paragraph 1, why did some societies develop and repeat ceremonial actions?
○To establish a positive connection between the members of the society
○To help society members better understand the forces controlling their food supply
○To distinguish their beliefs from those of other societies
○To increase the society’s prosperity
Paragraph 2: Stories (myths) may then grow up around a ritual. Frequently the myths include representatives of those supernatural forces that the rites celebrate or hope to influence. Performers may wear costumes and masks to represent the mythical characters or supernatural forces in the rituals or in accompanying celebrations. As a person becomes more sophisticated, its conceptions of supernatural forces and causal relationships may change. As a result, it may abandon or modify some rites. But the myths that have grown up around the rites may continue as part of the group’s oral tradition and may even come to be acted out under conditions divorced from these rites. When this occurs, the first step has been taken toward theater as an autonomous activity, and thereafter entertainment and aesthetic values may gradually replace the former mystical and socially efficacious concerns.
5. The word “this” in the passage refers to
○the acting out of rites
○the divorce of ritual performers from the rest of society
○the separation of myths from rites
○the celebration of supernatural forces
6. The word “autonomous” in the passage is closest in meaning to
○artistic
○important
○independent
○established
7. According to paragraph 2, what may cause societies to abandon certain rites?
○Emphasizing theater as entertainment
○Developing a new understanding of why events occur
○Finding a more sophisticated way of representing mythical characters
○Moving from a primarily oral tradition to a more written tradition，来源：北京新航道托福培训
Paragraph 5: In addition to exploring the possible antecedents of theater, scholars have also theorized about the motives that led people to develop theater. Why did theater develop, and why was it valued after it ceased to fulfill the function of ritual? Most answers fall back on the theories about the human mind and basic human needs. One, set forth by Aristotle in the fourth century B.C., sees humans as naturally imitative—as taking pleasure in imitating persons, things, and actions and in seeing such imitations. Another, advanced in the twentieth century, suggests that humans have a gift for fantasy, through which they seek to reshape reality into more satisfying forms than those encountered in daily life. Thus, fantasy or fiction (of which drama is one form) permits people to objectify their anxieties and fears, confront them, and fulfill their hopes in fiction if not fact. The theater, then, is one tool whereby people define and understand their world or escape from unpleasant realities.
8. All of following are mentioned in paragraph 5 as possible reasons that led societies to develop theater EXCEPT:
○Theater allows people to face that they are afraid of.
○Theater gives an opportunity to imagine a better reality.
○Theater is a way to enjoy imitating other people.
○Theater provides people the opportunity to better understand the human mind.
9. Which of the following best describes the organization of paragraph 5?
○The author presents two theories for a historical phenomenon.
○The author argues against theories expressed earlier in the passage.
○The author argues for replacing older theories with a new one.
○The author points out problems with two popular theories.
Paragraph 6: But neither the human imitative instinct nor a penchant for fantasy by itself leads to an autonomous theater. Therefore, additional explanations are needed. One necessary condition seems to be a somewhat detached view of human problems. For example, one sign of this condition is the appearance of the comic vision, since comedy requires sufficient detachment to view some deviations from social norms as ridiculous rather than as serious threats to the welfare of the entire group. Another condition that contributes to the development of autonomous theater is the emergence of the aesthetic sense. For example, some early societies ceased to consider certain rites essential to their well-being and abandoned them, nevertheless, they retained as parts of their oral tradition the myths that had grown up around the rites and admired them for their artistic qualities rather than for their religious usefulness.
10. The word “penchant” in the passage is closest in meaning to
○compromise
○inclination
○tradition
○respect
11. Why does the author mention “comedy”?
○To give an example of early types of theater
○To explain how theater helps a society respond to threats to its welfare
○To help explain why detachment is needed for the development of theater
○To show how theatrical performers become detached from other members of society
12. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
○A society’s rites were more likely to be retained in the oral tradition if its myths were admired for artistic qualities.
○The artistic quality of a myth was sometimes an essential reason for a society to abandon it from the oral tradition.
○Some early societies stopped using myths in their religious practices when rites ceased to be seen as
useful for social well-being.
○Myths sometimes survived in a society’s tradition because of their artistic qualities even after they were no longer deemed religiously beneficial.
Paragraph 3: █Although origin in ritual has long been the most popular, it is by no means the only theory about how the theater came into being. █Storytelling has been proposed as one alternative. █Under this theory, relating and listening to stories are seen as fundamental human pleasures. █Thus, the recalling of an event (a hunt, battle, or other feat) is elaborated through the narrator’s pantomime and impersonation and eventually through each role being assumed by a different person.
13. Look at the four squares [█] that indicate where the following sentence could be added to the passage.
To enhance their listeners’ enjoyment, storytellers continually make their stories more engaging and memorable.
Where would the sentence best fit?
14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.
Anthropologists have developed many theories to help understand why and how theater originated.
Answer choices
○The presence of theater in almost all societies is thought to have occurred because early storytellers traveled to different groups to tell their stories.
○Many theorists believe that theater arises when societies act out myths to preserve social well-being.
○The more sophisticated societies became, the better they could influence desirable occurrences through ritualized theater.
○Some theories of theater development focus on how theater was used by group leaders to group leaders govern other members of society.
○Theater may have come from pleasure humans receive from storytelling and moving rhythmically.
○The human capacities for imitation and fantasy are considered possible reasons why societies develop theater.
参考答案：
1. ○4
2. ○1
3. ○1
4. ○4
5. ○3
6. ○3
7. ○2
8. ○4
9. ○1
10. ○2
11. ○3
12. ○4
13. ○4
14. Many theorists believe that…
Theater may have come from…
The human capacities for imitation…
篇12：托福阅读真题及答案解析
托福阅读真题练习：声音的文本+题目+答案
托福阅读文本：
A number of factors related to the voice reveal the personality of the speaker. The first is the broad area of communication, which includes imparting information by use of language, communicating with a group or an individual, and specialized communication through performance. A person conveys thoughts and ideas through choice of words, by a tone of voice that is pleasant or unpleasant, gentle or harsh, by the rhythm that is inherent within the language itself, and by speech rhythms that are flowing and regular or uneven and hesitant, and finally, by the pitch and melody of the utterance. When speaking before a group, a person's tone may indicate unsureness or fright, confidence or calm. At interpersonal levels, the tone may reflect ideas and feelings over and above the words chosen, or may belie them. Here the conversant's tone can consciously or unconsciously reflect intuitive sympathy or antipathy, lack of concern or interest, fatigue, anxiety, enthusiasm or excitement, all of which are usually discernible by the acute listener. Public performance is a manner of communication that is highly specialized with its own techniques for obtaining effects by voice and /or gesture. The motivation derived from the text, and in the case of singing, the music, in combination with the performer's skills, personality, and ability to create empathy will determine the success of artistic, political, or pedagogic communication.
Second, the voice gives psychological clues to a person's self-image, perception of others, and emotional health. Self-image can be indicated by a tone of voice that is confident, pretentious, shy, aggressive, outgoing, or exuberant, to name only a few personality traits. Also the sound may give a clue to the facade or mask of that person, for example, a shy person hiding behind an overconfident front. How a speaker perceives the listener's receptiveness, interest, or sympathy in any given conversation can drastically alter the tone of presentation, by encouraging or discouraging the speaker. Emotional health is evidenced in the voice by free and melodic sounds of the happy, by constricted and harsh sound of the angry, and by dull and lethargic qualities of the depressed.
托福阅读题目：
1. What does the passage mainly discuss?
(A) The function of the voice in performance
(B) The connection between voice and personality
(C) Communication styles
(D) The production of speech
2. What does the author mean by stating that, “At interpersonal levels, tone may reflect ideas and
feelings over and above the words chosen” (lines 9-10)?
(A) Feelings are expressed with different words than ideas are.
(B) The tone of voice can carry information beyond the meaning of words.
(C)A high tone of voice reflects an emotional communication.
(D) Feelings are more difficult to express than ideas.
3. The word “Here” in line 10 refers to
(A) interpersonal interactions
(B) the tone
(C) ideas and feelings
(D) words chosen
4. The word “derived” in line 15 is closest in meaning to
(A) discussed
(B) prepared
(C) registered
(D) obtained
5. Why does the author mention “artistic, political, or pedagogic communication” in line 17?
(A)As examples of public performance
(B)As examples of basic styles of communication
(C) To contrast them to singing
(D) To introduce the idea of self-image
6.According to the passage , an exuberant tone of voice, may be an indication of a person's
(A) general physical health
(B) personality
(C) ability to communicate
(D) vocal quality
7.According to the passage , an overconfident front may hide
(A) hostility
(B) shyness
(C) friendliness
(D) strength
8. The word “drastically” in line 24 is closest in meaning to
(A) frequently
(B) exactly
(C) severely
(D) easily
9. The word “evidenced” in line 25 is closest in meaning to
(A) questioned
(B) repeated
(C) indicated
(D) exaggerated
10.According to the passage , what does a constricted and harsh voice indicate?
(A) lethargy
(B) depression
(C) boredom
(D) anger
托福阅读答案：
BBADABBCCD
托福阅读真题练习：水彩画的文本+题目+答案
托福阅读文本：
The year 1850 may be considered the beginning of a new epoch in America art, with respect to the development of watercolor painting. In December of that year, a group of thirty artists gathered in the studio of John Falconer in New York City and drafted both a constitution and bylaws, establishing The Society for the Promotion of Painting in Water Color. In addition to securing an exhibition space in the Library Society building in lower Manhattan, the society founded a small school for the instruction of watercolor painting. Periodic exhibitions of the members' paintings also included works by noted English artists of the day, borrowed from embryonic private collections in the city. The society's activities also included organized sketching excursions along the Hudson River. Its major public exposure came in 1853, when the society presented works by its members in the “Industry of All Nations” section of the Crystal Palace Exposition in New York.
The society did not prosper, however, and by the time of its annual meeting in 1854 membership had fallen to twenty-one. The group gave up its quarters in the Library Society building and returned to Falconer's studio, where it broke up amid dissension. No further attempt to formally organize the growing numbers of watercolor painters in New York City was made for more than a decade. During that decade, though, Henry Warren's Painting in Water Color was published in New York City in 1856 — the book was a considerable improvement over the only other manual of instruction existing at the time, Elements of Graphic Art, by Archibald Roberson,published in 1802 and by the 1850's long out of print.
In 1866 the NationalAcademy of Design was host to an exhibition of watercolor painting in its elaborate neo-Venetian Gothic building on Twenty-Third Street in New York City. The exhibit was sponsored by an independent group called The Artists Fund Society. Within a few months of this event, forty-two prominent artists living in and near New York City founded The American Society of Painters in Water Colors.
托福阅读题目：
1. This passage is mainly about
(A) the most influential watercolor painters in the mid-1800's
(B) efforts to organize watercolor painters in New York City during the mid-1800's
(C) a famous exhibition of watercolor paintings in New York City in the mid-1800's
(D) styles of watercolor painting in New York City during the mid-1800's
2. The year 1850 was significant in the history of watercolor painting mainly because
(A) a group of artists established a watercolor painting society
(B) watercolor painting was first introduced to New York City
(C) John Falconer established his studio for watercolor painters
(D) The first book on watercolor painting was published
3. The word “securing” in line 5 is closest in meaning to
(A) locking
(B) creating
(C) constructing
(D) acquiring
4. All of the following can be inferred about the Society for the promotion of Painting in
Watercolor EXCEPT:
(A) The society exhibited paintings in lower Manhattan.
(B) Instruction in watercolor painting was offered by members of the society
(C) The society exhibited only the paintings of its members.
(D) Scenes of the Hudson River appeared often in the work of society members.
5. The exhibition at the Crystal Palace of the works of the Society for the Promotion of Painting in
Watercolor was significant for which of the following reasons?
(A) It resulted in a dramatic increase in the popularity of painting with watercolor.
(B) It was the first time an exhibition was funded by a private source.
(C) It was the first important exhibition of the society's work.
(D) It resulted in a large increase in the membership of the society.
6. The word “it” in line 15 refers to
(A) time
(B) group
(C) building
(D) studio
7. Which of the following is true of watercolor painters in New York City in the late 1850's?
(A) They increased in number despite a lack of formal organization.
(B) They were unable to exhibit their paintings because of the lack of exhibition space.
(C) The Artists Fund Society helped them to form The American Society of Painters in Water
Colors.
(D) They formed a new society because they were not allowed to join groups run by other kinds of
artists.
8. Henry Warren's Painting in Water Color was important to artists because it
(A) received an important reward
(B) was the only textbook published that taught painting
(C) was much better than an earlier published fundamental of instruction
(D) attracted the interest of art collectors
9. The word “considerable” in line 19 is closest in meaning to
(A) sensitive
(B) great
(C) thoughtful
(D) planned
10. The year 1866 was significant for watercolor painting for which of the following reasons?
(A) Elements of GraphicArt was republished.
(B) Private collections of watercolors were first publicly exhibited.
(C) The neo-Venetian Gothic building on Twenty-Third Street in New York City was built.
(D) The NationalAcademy of Design held an exhibition of watercolor paintings.
11. The word “prominent” in line 25 is closest in meaning to
(A) wealthy
(B) local
(C) famous
(D) organized
托福阅读答案：
BADCC BACBD C
托福阅读真题练习：霍霍坎的文本+题目+答案
托福阅读文本：
The observation of the skies has played a special part in the lives and cultures of peoples since the earliest of times. Evidence obtained from a site known as the Hole in the Rock, in Papago Park in Phoenix, Arizona, indicates that it might have been used as an observatory by a prehistoric people known as the Hohokam.
The physical attributes of the site allow its use as a natural calendar/clock. The “hole” at Hole in the Rock is formed by two large overhanging rocks coming together at a point, creating a shelter with an opening large enough for several persons to pass through. The northeast-facing overhang has a smaller opening in its roof. It is this smaller hole that produces the attributes that may have been used as a calendar/clock.
Because of its location in the shelter's roof, a beam of sunlight can pass through this second hole and cast a spot onto the shelter's wall and floor. This spot of light travels from west to east as the sun moves across the sky. It also moves from north to south and back again as the Earth travels around the Sun, the west-to-east movement could have been used to establish a daily clock, much like a sundial, while the north-to-south movement could have been used to establish a seasonal calendar.
The spot first appears and starts down the surface of the wall of the shelter at different times of the morning depending on the time of the year. The spot grows in size from its first appearance until its maximum size is achieved roughly at midday. It then continues its downward movement until it reaches a point where it jumps to the floor of the shelter. As the Sun continues to move to the west, the spot continues to move across the shelter floor and down the butte, or hill, toward a group of small boulders. If a person is seated on a certain one of these rocks as the spot reaches it, the Sun can be viewed through the calendar hole. This occurs at different times in the afternoon depending on the time of year.
托福阅读题目：
1. What does the passage mainly discuss?
(A) observations of the stars by ancient people
(B) rock formations of Arizona
(C) a site used by ancient people to measure time
(D) the movement of the earth around the Sun
2. The word “obtained” in line 2 is closest in meaning to
(A) acquired
(B) transported
(C) covered
(D) removed
3. The word “attributes” in line 5 is closest in meaning to
(A) changes
(B) characteristics
(C) locations
(D) dimensions
4. The word “its” in line 10 refers to
(A) roof
(B) beam
(C) hole
(D) spot
5. The word “establish” in line 15 is closest in meaning to
(A) create
(B) locate
(C) consult
(D) choose
6. Which of the following is NOT true of the spot of light?
(A) It is caused by sunlight passing through a hole.
(B) It travels across the roof of the shelter.
(C) Its movement is affected by the position of the Sun.
(D) It movement could have been used to estimate the time of day.
7. From which of the following can be the time of year be determined?
(A) The movement of the spot of light from west to east
(B) The speed with which the spot of light moves
(C) The movement of the spot of light from north to south
(D) The size of the sport of light at midday
8. The word “roughly” in line 18 is closest in meaning to
(A) finally
(B) harshly
(C) uneasily
(D) approximately
9. The passage mentions that the Hole in the Rock was used as all of the following EXCEPT
(A) a calendar
(B) a home
(C) a clock
(D) an observatory
10. Which of the following can be inferred from the fourth paragraph?
(A) The boulders are located below the rock shelter.
(B) The person seated on the rock cannot see the shelter.
(C)After it passes the boulders, the spot of light disappears.
(D) The spot of light is largest when it first appears.
托福阅读答案：
CABCA BCDBA
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