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1、1 2020-2021 学年高一下学期训练卷 必修三 Unit4 Astronomy: the science of the stars 英语（二） 一、阅读理解 A Astronomy( 天 文 学 ) is the oldest science known to man. Thousands of years ago man looked at the stars and wondered about heavens(天堂). But the six planets that he could see with his eyes alone limited man. The Greeks
2、studied astronomy over 2,000 years ago. They could see the size, color, and brightness of a star. They could see its place in the sky. They watched the stars move as the seasons changed. But the Greeks had no tools to help themselves study the heavens. Each new tool added to the field of astronomy h
3、elped man reach out into space. Until there were telescopes(望 远 镜 ), man did not know much about the moon. He did not know that the planet called Saturn(土星) had rings around it. His sight was so limited that he could not see all the planets. In the early 1700s, people thought there were only six pla
4、nets. Pluto(冥王星), the last of the nine planets to be discovered was seen until 1930. Before the spectroscope(分光镜), man didnt know what kind of gas was in the sun or other stars, without radio telescopes(射电望远镜), we did not know that radio noise came from far in space. Today, astronomy is a growing sc
5、ience. We have learned more in the past fifty years than in the whole history of astronomy. 1. Thousands of years ago, what did the man watch with his eyes? A. The moonB. The starsC. The universeD. All the planets 2. When the Greeks watched the stars, they could. A. know what the stars were made of
6、B. not see their places in the sky C. help themselves study the heavens D. watch the stars move as the seasons changed 3. Man knew very little about the moon until there were. A. telescopesB. spectroscopesC. radio telescopesD. spaceships 4. People didnt know about Pluto until _. A. the 1700sB. 2,000
7、 years ago C. 1930D. thousands of years ago B Unless we spend money to spot and prevent asteroids(小行星) now, one might crash into Earth and destroy life as we know it, say some scientists. Asteroids are bigger versions of the meteoroids(流星) that race across the night sky. Most orbit the sun far from
8、Earth and dont threaten us. But there are also thousands of asteroids whose orbits put them on a collision course with Earth. Buy $50 million worth of new telescopes right now. Then spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the
9、 scientists say, well have a way to change its course. Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldnt be cheap. Is it worth it? Two things experts consider when judging any risk are: 1) How likely the event is; 2) How bad the consequences if the event o
10、ccurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500,000 years. Sounds pretty rare but if one did fall, it would be the end of the world. “If we dont take care of these big asteroids, theyll take care of us,” says one scientist. “Its that simple.” The
11、 cure, though, might be worse than the disease. Do we really want fleets of nuclear weapons sitting around on Earth? “The world has less to fear from doomsday(毁灭性的) rocks than from a great nuclear fleet set against them,” said a New York Times article. 5. What does the passage say about asteroids an
12、d meteoroids? A. They are heavenly bodies different in composition. B. They are heavenly bodies similar in nature. C. These are more asteroids than meteoroids. D. Asteroids are more mysterious than meteoroids. 6. What do scientists say about the collision of an asteroid with Earth? A. It is unlikely
13、 but the danger exists. B. Such a collision might occur once every 25 years. C. Collision of smaller asteroids with Earth occur more often than expected. D. Its still too early to say whether such a collision might occur. 此卷只装订不密封 班级姓名准考证号考场号座位号 此卷只装订不密封 班级姓名准考证号考场号座位号 2 7. What do people think of t
14、he suggestion of using nuclear weapons to alter the course of asteroids? A. It sounds practical but it may not solve the problem. B. It may create more problems than it might solve. C. It is a waste of money because a collision of asteroids with Earth is very unlikely. D. Further research should be
15、done before it is proved applicable. 8. We can conclude from the passage that. A. while pushing asteroids off course nuclear weapons would destroy the world B. asteroids racing across the night sky are likely to hit Earth in the near future C. the worry about asteroids can be left to future generati
16、ons since it is unlikely to happen in our lifetime D. workable solutions still have to be found to prevent a collision of asteroids with Earth 二、七选五 Countries around the globe are spending billions of dollars and lots of time on various space missions.9Instead, we should feed the worlds poor and find immediate solutions to other problems. However, others feel this is a shallow view which fails to realize how exploring space helps us. 10It has directly resulted in the many satellites that
