2011年6月英语四级阅读(2011年四级阅读答案)

Part ⅡReading Comprehension (Skimming and Scanning)(15 minutes)

Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1.For questions 1-7,choose the best answer from the four choices marked [A],[B],[C]and [D]. For questions 8-10,complete the sentences with the information given in the passage.

　　Space

Our Future in Space: It Has Already Begun!

We are all space travelers. But we’ve stayed close to home until now. One day, we may leave our “mother瞫hip” Earth to make our home among the stars.

A giant, spherical “spaceship”, about 8,000 miles in diameter, is speeding through the solar system right now. It is cruising at an incredible 66,600 miles per hour.

It’s not a giant, Star Wars mother瞫hip. It’s spaceship Earth, the home of over four billion people. This water瞔oated spaceship has been traveling through the universe for about five billion years. Only within the past 25 years, however, have some of its passengers broken free of Earth’s gravity.

But 25 years from now, many people, including you, might live in an orbiting space station 200 miles above the Earth.

Space Cities

Scientists have already designed special space factories. These factories will take advantage of the absence of gravity (zero gravity) to produce everything from life瞫aving drugs to perfect ball bearings.

Other scientists have designed space colonies, complete with farms, schools, and artificial day and night. Hundreds, or even thousands, of people will live, work, play—even go to school, far above the Earth.

Our conquest of space, of course, has already begun. We have explored part of the Moon, sent robot spaceships onto the surface of Venus and Mars, and aimed space probes past the planets of Jupiter and Saturn.

Last June, one robot ship, Pioneer 10, left our solar system forever. And astronauts from both the Soviet Union and the United States have lived in space stations.

The conquest of space, without question, is one of the greatest adventures human beings have ever set out on. But it may be more than a great adventure. Some scientists think the conquest of space may be a necessity for survival of the human species.

We are tearing up more and more of the Earth to get raw materials for industry. And we are polluting the air and water as we manufacture products that we need or want. Almost everything that seems to make our lives more comfortable, and from electricity to pesticides, uses up or alters a piece of our planet’s natural environment.

Why Go into Space?

Yet our solar system is full of resources. The moon is chockfull of valuable metals. So are the asteroids, the small, rocky, planet瞝ike bodies orbiting the sun most of them between Mars and Jupiter. These metals, if we can get them, could be used to build factories and space stations.

Also, in space, there is no atmosphere to filter out the sun’s energy. There is plenty of solar energy to be turned into electricity for manufacturing, for creating comfortable living conditions.

Getting away from Earth has other advantages, too. Modern industry uses many kinds of metal alloys (mixtures of metal that are better for certain purposes than pure metals). Yet some metal alloys either can’t be made or are very expensive to make on Earth because of gravity. For instance, certain metals don’t mix well on Earth. But in zero gravity, molten (hot, liquid) metals mix more evenly. This is because there is no gravity to pull the heavier metals down, while the lighter ones float on top.

From space, too, we can look down on the Earth and study the atmosphere, its weather, and the effects of air pollution.

And because there is no strong gravity to break free from, our future homes away from Earth will be convenient starting points for travel to distant planets.

But, while going into space might solve some problems, outer space can also be a dangerous place. For example, in outer space, we have to protect ourselves from the dangers of ultraviolet light and cosmic rays. Ultraviolet light from the sun can give us bad sunburns right here on Earth. Yet, Earth’s atmosphere screens out most of that harmful radiation. Cosmic rays are tiny high-energy particles from outer space. Again, the Earth shields us from most of them.

At Home in Space?

But in space, without special protection, we would be exposed to much stronger radiation from ultraviolet light and cosmic rays. Also, in the zero gravity of outer space, our bones will lose calcium and become weaker. This will be more of a problem the longer people stay out in space. Doctors are looking for a way to keep our bones from losing calcium in outer space. And a small spaceship just might “drive you batty” after a while. But even on a short trip in outer space, you might not feel as well as you’d like to. Space travel could make you seasick!

Yet, these risks won’t keep people from going into space. Eventually, an Earth-like environment will be built in space. And they will be populated by people with many different interests: medicine, construction, farming, teaching, mining, and so on.

The next hundred years will be filled with other worldly adventures, exciting scientific discoveries, and danger, as humans leave Earth—perhaps forever.

Aging in Space

Suppose a space traveler is moving at a velocity of 186,200 miles per second. For every hour that passes for him, 30 hours pass on Earth. If he travels for a year in this fashion (having accelerated instantaneously) and then turns around and comes back at this speed (having turned around instantaneously), he will find that while he has seemed to himself to have traveled two years, the men on Earth would claim he had been absent for 30 years.

Suppose the space traveler had left at the age of 30, leaving behind a twin brother also aged 30. When he returned he would be 32, but his stay-at-home twin brother would be 60. That is why the “clock paradox”, is sometimes called the “twin paradox”.

Of course it takes quite a long while to accelerate to a high speed, and a long while to make a turn and head back again, so conditions aren’t quite as clear-cut as just described.

1.The giant, spherical spaceship mentioned in the passage is .

[A]the outer space[B]a man-made spaceship

[C]the planet Earth[D]the Star Wars mother瞫hip

2.Some persons have traveled into outer space after conquering within the past 25 years.

[A]the universe[B]Earth’s gravity

[C]the earth[D]outer space

3. We have explored or sent robot spaceships to the following space except .

[A]the moon[B]Venus[C]Jupiter[D]Mars

4. Why is the conquest of space more than a great adventure?

[A]Because it is full of challenges for human beings.

[B]Because it may be necessary for human beings to survive.

[C]Because it is the greatest adventure in human history.

[D]Because it is more exciting than any other adventures.

5.The moon and the asteroids are alike with respect to their .

[A]size and moving ways[B]comfortable living conditions

[C]rich and valuable metals[D]solar energy

6.Why can’t ultraviolet light scorch our skin on Earth as seriously as it does in space places?

[A]Because the Earth’s atmosphere can make ultraviolet light less harmful.

[B]Because ultraviolet can’t reach the Earth at all.

[C]Because the Earth is far away from those planets radiating ultraviolet light.

[D]Because other space places is near from those planets radiating ultraviolet light.

7.In spite of many risks, scientists will finally build in space suitable for humans to live.

[A]an environment without ultraviolet light

[B]a lot of homes

[C]an Earth-like environment

[D]an environment with atmosphere

8.The reason some metal alloys can’t be made on Earth is that the heavier metals together with the lighter ones .

9.In space, there is no atmosphere to filter out the sun’s energy. There is plenty of solar energy to be turned into , for creating comfortable living conditions.

10.According to the author, will be caused to a man in gravity-free space.

2011年6月英语四级考试全真预测试卷第二套：快速阅读 摘自《2011大学英语四级考试全真预测卷》

  相关文章:

   1.alterv.改变，改动，变更2.burstvi.n.突然发生，爆裂3.disposevi.除掉;处置;解决;处理(of)4.blastn.爆炸;气流vi.炸，炸掉5.consumev.消耗，耗尽6.splitv.劈开;割裂;分裂a.裂开的7.spitv.吐(唾液等);唾弃8.spillv.溢出，溅出，倒出9.slipv.滑动，滑落;忽略10.

   关于四级写作，通常大家都会背诵一些作文模板句和常用素材，考场上再结合主题自己写一些，这样在作文上拿到的分数就会达到一个相对稳定的档次。想要在此基础上锦上添花，今天四六级和大家分享22020年6月大学英语四级模板范文：景点，希望对您有所帮助。大学英语四级模板范文：景点ThePal

   听力的训练是一项系统工程。只靠多听，采取量中求质的办法，是很难大幅度地提高学生的听力的。要提高学生听力，应从以下几方面入手。1、读准语音正确的语音是听音辨音的基础，只有把英语音学准读准，才能进行听音辨音。因此，我要求学生每天早晨坚持半小时的听录音跟读练习，跟读过程中，只求读准语音。随堂设计5分钟的辨音练习，形式可多样化。比如：一生朗读，其余听辨有无错

   四六级考试网提醒各位考生，11月12日大学英语四六级考试准考证打印入口已经开通了，距离考试的日子越来越近，今天和大家分享2018年12月大学英语六级作文模板：谚语格言类，请看下面的文章内容。文章题目为一句格言或谚语，通常模式为：解释谚语-举例论证-画龙点睛1.阐述名言或主题所蕴涵的意义。2.分析并举例使其更充实。Thegoodol

   2022年6月大学英语四级考试需要提前准备，提前背些范文，对范文里的句子进行灵活改编，能够更容易在写作中拿到高分，四六级网小编为大家整理2022年6月英语四级写作范文，希望对大家的四级考试作文题有帮助~Directions:Forthispart,youareallowed30minutestowriteacompositiononthetopic:MyViewontheL