The next great land area that man hopes to co...

The next great land area that man hopes to control is the moon. In size it is nearly equal to the area of North and South America. However, it presents a hostile (不友好的) environment. Temperatures range +120 to -150 degrees Centigrade. There is no air, and no water.

Today there is considerable scientific speculation (思索) about living on the moon. When man will begin life on the moon surface is still not determined. But experts believe that settlement will take place in three steps. First, there will be increasing periods of exploration with temporary shelters. These periods will be followed by longer stays with housing under the surface of the moon and daily necessities brought by the settlers themselves from the earth. Finally, settlements that are self-supporting will be founded.

The main job of the early settlers will be to stay alive. They will have to plant crops under huge domes (圆顶屋) to produce food and oxygen and find water sources. After this is done, the settlers will have time to explore the possibilities of commercial (商业的) development and to make discoveries important to science. The characteristics of the moon that make it bad for human staying alive may make it ideal for certain kinds of manufacturing . Operations requiring a vacuum (真空) or extreme cold are examples. Therefore, industrial diamonds might be produced on the moon.

1.The area of the moon is _________.

A. about the same as that of North and South America

B. larger than that of North and South America

C. hardly equal to that of North and South America

D. far smaller than that of North and South America

2.To stay alive on the moon, first of all the early settlers must be able to ______.

A. get enough food, oxygen and water

B. develop commerce

C. make discoveries important

D. explore the possibilities of industrial development

3.Though the environment on the moon is bad for human staying alive, it is very good for ________.

A. all kinds of manufactured goods

B. commercial development

C. making such things as industrial diamonds

D. medical operations

高二英语阅读理解中等难度题查看答案及解析

It’s said that in that area there is more land than the government knows ______.

A．it what to do with                       B．what to do it with

C．what to do with it                        D．to do what with it

高二英语单项填空中等难度题查看答案及解析

The ocean bottom，a region nearly 2.5 times greater than the total land area of the Earth， is even today largely unexplored. Until about a century ago，the deep-ocean floor was completely inaccessible and hidden beneath waters averaging over 3，600 meters deep. Total­ly without light and subjected to intense pressures hundreds of times greater than at the Earth's surface，the deep-ocean bottom is a strange environment to humans，in some ways as forbidding and remote as the outer space.

Although researchers have taken samples of deep-ocean rocks for over a century，the first detailed global study of the ocean bottom did not actually start until 1968，with the beginning of the National Science Foundation's Deep Sea Drilling Project ( DSDP). Using techniques first developed for the offshore oil and gas industry，the DSDP's drill ship，the Glomar Challenger，was able to maintain a steady position on the ocean's surface and drill in very deep waters，taking samples of rock from the ocean floor.

The Glomar Challenger completed 96 voyages in a 15-year-research program that ended in November 1983. During this time，it sailed 600，000 kilometers and took almost

20，000samples of rocks around the world. Those samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to make out what it will probably look like millions of years in the future. Today，largely on the strength of evidence gathered during the Glomar Challenger's voyages，nearly all earth scientists agree on the theories of plate tectonics (构造学) and continental drift that explains many of the geological processes.

The samples of rocks drilled by the Glomar Challenger have also provided a climatic re­cord stretching back hundreds of millions of years. The information of past climatic changes can be used to predict future climates.

1.The underlined word" inaccessible" in Line 3 means     .

A. unrecognizable   B. unreachable C. unusable     D. unreasonable

2.Why does the author mention "outer space" in the first paragraph?

A.The Earth's climate millions of years ago was similar to that in outer space.

B.It is similar to the ocean floor in being strange to the humans.

C.Rock formations in outer space are similar to those found on the ocean floor.

D.Techniques used by scientists to explore outer space were similar to those used in ocean exploration.

3.Which of the following is TRUE of the Glomar Challenger?

A. It is a type of submarine.   B. It is an ongoing project.

C. It has gone on over 100 voyages.      D. It made its first DSDP voyage in 1968.

4.The Deep Sea Drilling Project was significant because it was         .

A.an attempt to find new sources of oil and gas

B.the first extensive exploration of the ocean bottom

C.made up of geologists from all over the world

D.supported entirely by the gas and oil industry

5.Which is NOT mentioned in the passage as being a result of the Deep Sea Drilling Project?

A.Geologists were able to determine the Earth's appearance millions of years ago.

B.Two geological theories became more widely accepted by scientists.

C.Geologists observed forms of life never before seen.

D.Information was revealed about the Earth's past climatic changes.

高二英语阅读理解中等难度题查看答案及解析

Migration(迁徙), is a long journey carried out by some birds to other areas where they hope to find more food and a warmer place to spend winter. Hundreds or thousands of miles' journey is actually difficult and dangerous. So why do birds migrate?1.However, it all comes down to survival.

Migrating for a Meal

For all birds, one of the main driving forces behind migration is food shortage. If all birds were to stay in the same warm regions all the year round, food would become lacking and producing their young would be less successful. As food resources are rich in the north each spring, millions of birds migrate there for the food supplies.2.

Migrating for Family

Over thousands of years, birds have evolved different migration patterns, timing and destinations to fly around the world to produce their young. Birds take advantage of a wide variety of suitable conditions to raise their young.3.

Migrating for Climate

Birds have evolved different types of feathers to survive different climates.4.So many birds leave the Arctic producing grounds, for example, when temperatures begin to fall and they need warmer habitats. Similarly, the hottest regions can be a bad environment for raising little chicks, and they will choose cooler areas to lay eggs.

Migrating for Predators(掠食动物)

Habitats that have rich food resources all the year round also attract a greater number of predators that can threaten their nests.5.It gives their young a better chance of reaching maturity. Many birds even migrate to specialized habitats that are nearly inaccessible to predators.

A.Birds always tend to fly to warmer places.

B.And changes in those climates can affect migration.

C.This increases the surviving chances of little chicks.

D.Birds have adapted themselves to their own surroundings.

E.There is more than one reasons for different birds to migrate

F.As the food supplies decrease in fall, they return to warm regions.

G.So birds migrate to different habitats to avoid being eaten by predators.

高二英语七选五中等难度题查看答案及解析

The African elephant, which is the largest land animal remaining on earth, is of great importance to African ecosystem. Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the- forest-and-savanna (大草原) surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat.

It is the elephant's great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and under-bushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters.

Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.

What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly

changing and worsening the whole ecosystem.

1.What is the passage mainly about?

A. Disappearance of African elephants.

B. The effect of African elephants' search for food.

C. Forests and savannas as habitats for African elephants.

D. The eating habit of African elephants.

2.What does the underlined phrase "setting the terms" most probably mean?

A. Fixing the time.　　 B. Deciding the conditions.

C. Improving the quality.　　 D. Worsening the state.

3.What do we know about the open spaces in the passage?

A. They result from the destruction of rain forests.

B. They provide food mainly for African elephants.

C. They are attractive to plant-eating animals of different kinds.

D. They are home to many endangered animals.

4.The passage is developed mainly by_____

A. giving examples

B. pointing out similarities and differences

C. describing the changes in space order

D. showing the effect and then explaining the causes

高二英语阅读理解中等难度题查看答案及解析

The African elephant, which is the largest land animal remaining on earth, is of great importance to African ecosystem. Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the forest-and-savanna (大草原) surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat.

It is the elephant's great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and under-bushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters.

Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.

What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.

1.What is the passage mainly about?

A. Disappearance of African elephants.

B. The effect of African elephants’ search for food.

C. Forests and savannas as habitats for African elephants.

D. The eating habit of African elephants.

2.What does the underlined phrase “setting the terms” most probably mean?

A. Fixing the time.

B. Deciding the conditions.

C. Improving the quality.

D. Worsening the state.

3.What do we know about the open spaces in the passage?

A. They result from the destruction of rain forests.

B. They provide food mainly for African elephants.

C. They are attractive to plant-eating animals of different kinds.

D. They are home to many endangered animals.

4.The passage is developed mainly by ______.

A. giving examples

B. pointing out similarities and differences

C. describing the changes in space order

D. showing the effect and then explaining the causes

高二英语阅读理解中等难度题查看答案及解析

How to control housing price is said to ________ a great challenge facing the government over the past few years.

高二英语单项填空简单题查看答案及解析

The African elephant, the largest land animal remaining on the earth, is of great importance to African ecosystem(生态系统). Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the forest-and-savanna(大草原) surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat.

It is the elephant’s great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and underbushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas(热带草原). In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters.

Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.

What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.

1.What is the passage mainly about?

2.What does the underlined phrase “setting the terms” most probably mean?

3.According to the passage, which of the following statements is TRUE?

4.The passage is developed mainly by ________.

高二英语阅读理解困难题查看答案及解析

The African elephant, the largest land animal remaining on earth, is of great importance to African ecosystem(生态系统). Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the forest-and-savanna(大草原) surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat.

It is the elephant’s great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and under-bushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of the African savannas. In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters.

Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.

What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.

1.What does the underlined phrase “setting the terms” most probably mean?

A．Improving the quality.

B．Worsening the state.

C．Fixing the time.

D．Deciding the conditions.

2.The passage is developed mainly by_________.

A．showing the effect and then explaining the causes

B．giving examples

C．pointing out similarities and differences

D．describing the changes in space order

3.What is the passage mainly about?

A．Forests and savannas as habitats for African elephants.

B．The eating habit of African elephants.

C．Disappearance of African elephants.

D．The effect of African elephants’ search for food.

4.What do we know about the open spaces in the passage?

A．They are home to many endangered animals.

B．They result from the destruction of rain forests.

C．They are attractive to plant-eating animals of different kinds.

D．They provide food mainly for African elephants.

高二英语阅读理解中等难度题查看答案及解析

The African elephant, the largest land animal remaining on earth , is of great importance to African ecosystem(生态系统). Unlike other animals, the African elephant is to a great extent the builder of its environment. As a big plant-eater, it largely shapes the forest-and-savanna(大草原)surroundings in which it lives, therefore setting the terms of existence for millions of other animals that live in its habitat(栖息地).

It is the elephant's great desire for food that makes it a disturber of the environment and an important builder of its habitat. In its continuous search for the 300 pounds of plants it must have every day, it kills small trees and underbushes, and pulls branches off big trees. This results in numerous open spaces in both deep tropical forests and in the woodlands that cover part of

the African savannas. In these open spaces are numerous plants in various stages of growth that attract a variety of other plant-eaters.

Take the rain forests for example. In their natural state, the spreading branches overhead shut out sunlight and prevent the growth of plants on the forest floor. By pulling down trees and eating plants, elephants make open spaces, allowing new plants to grow on the forest floor. In such situations, the forests become suitable for large hoofed plant-eaters to move around and for small plant-eaters to get their food as well.

What worries scientists now is that the African elephant has become an endangered species. If the elephant disappears, scientists say, many other animals will also disappear from vast areas of forest and savanna, greatly changing and worsening the whole ecosystem.

1.What is the passage mainly about?

A. Disappearance of African elephants.

B. Forests and savannas as habitats for African elephants.

C. The effect of African elephants' search for food.

D. The eating habit of African elephants.

2.What does the underlined phrase “setting the terms” most probably mean?

A. Fixing the time.　

B. Worsening the state.

C. Improving the quality.

D. Deciding the conditions.

3.What do we know about the open spaces in the passage?

A. They result from the destruction of rain forests.

B. They provide food mainly for African elephants.

C. They are home to many endangered animals.

D. They are attractive to plant-eating animals of different kinds.

4.The passage is developed mainly by________.

A. showing the effect and then explaining the causes

B. pointing out similarities and differences

C. describing the changes in space order

D. giving examples

高二英语阅读理解中等难度题查看答案及解析