As space science develops, man has learned more and more about space. Space is n-组卷网

题型：短文填空-汉语提示填空难度：0.65 引用次数：261 题号：6324291

As space science develops, man has learned more and more about space. Space is not only a 1 but also dangerous. While working in space, spacemen are facing danger as well as s 2 .

Scientists have found out that the in radiation(辐射)is the greatest danger to spacemen. When spacemen are working in space, they are in d 3 of the radiation from the sun and other stars, which is bad for their health. The h 4 of the radiation won’t be found until their children even grandchildren are born. Some s 5 medicine may work a little, but no really effective medicine has been found so far.

Space r 6 is also thought to be a great danger to spacemen. It’s reported that there were 9,000 man-made things flying in space. About 30% of these are satellites, 10% are s 7 , and the rest are space rubbish. An explosion(爆炸)in space in 1999 made a cloud of 300,000 fragments (碎片), each at least 4mm in size. A small piece of these even knocked a spaceship window and c 8 some damage（损坏）.

Scientists are watching and reporting any possible danger all the time. They are working to deal with space rubbish. A 9 space is really dangerous, it interests many people on the Earth. In the near future, it may become possible for people to spend a few days in a space hotel. We may even choose to leave the earth and live in space in a few years. So we should do something to help i 10 the space environment.

17-18九年级下·江苏宿迁·单元测试查看更多[1]

更新时间：2018-04-23 02:02:25 |

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【知识点】天体与宇宙

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【推荐1】Some people believe that humans could live on the planet Mars by the year 2100. Our own planet, the Earth, is becoming more and more c 1 and polluted because of the increase in population. It is hoped that people could start to b 2 a better world on Mars. Here is what life there could be like.

At present, our spaceship are too slow to carry large numbers of passengers to Mars-it would take months, with the development of t 3 , by the year 2100, the journey might only take about 20 minutes in spaceship that travel at the speed of light! However, the spaceship would travel so fast that the journey to Mars might be quite uncomfortable. Many people would f 4 ill.

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Gravity(重力) could be a 7 problem. The gravity on Mars is only about three-eighths of that on the Earth. People would have to wear boots that are specially designed(设计) to stop themselves from floating(飘) off into space.

C 8 with life on the Earth, life on Mars would be better in some ways. People would have more space. They might live in houses with huge comfortable rooms. What’s m 9 , robots would do most of their work so that they could have more time to relax. There would probably be no schools on Mars. Every student would have a computer at home connected to an interplanetary network, they would study at online schools with “e-teachers”.

Life on Mars would be i 10 as well as challenging(有挑战性的).

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It is said that there has been life on the earth for hundreds of millions of years. Is there life on other planets? The scientists found that n 1 of them has an environment like that of the earth. So there is only life on the earth. The earth is a planet and it goes around the sun. Some other planets also go around the sun. But the sun is a small part of the universe.

Many other galaxies are far away from us. Their light has to travel for many years to 2 (到达)us. How large is the universe? It is i 3 to imagine. No s 4 (宇宙飞船)has travelled far enough to get to other stars. Are we alone, or is there life out there in space? Why has no one from other planets tried to c 5 with us? We do not know the answers.

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Fifty years ago, China 1 (successful) launched its first satellite Dongfanghong 1 and started a new page in space exploration. To 2 /mɑːk/ its 50th anniversary, the China National Space Administration announced the name for the country’s Mars planetary exploration program on April 24.

The mission Tianwen got 3 (it) name from a long poem Tianwen written by Qu Yuan, 4 famous poet of the Warring States Period. In the poem, Qu raised a series of questions about the sky, stars and the real world which reflected his doubts on traditional ideas and his pursuit (追求) of 5 (true).

So far, China has made great progress 6 space exploration. In 1970, China launched its first man-made Earth satellite, making China the 7 (five) country in the world to launch man-made satellites independently.

Over the past few years, China’s Shenzhou series have been 8 (design) to explore outer space. This time the Tianwen series carried out the first Mars exploration mission, 9 it is a milestone (里程碑) for China’s move toward space. With the names 10 /diːp/ roots in Chinese traditional culture, Tianwen shows the determination of Chinese people to move farther into space than ever before.

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