As space science develops, man has learned more about space. While working in space, spacemen are facing danger as well as success.
Scientists have found out that radiation(辐射) is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of the radiation from the sun and other stars, which is bad for their health. The harm of the radiation won’t be found until their children even grandchildren are born. Some special medicine may work a little, but no really useful medicine has been found so far.
Space rubbish is also thought to be a great danger to spacemen. It is reported that there were 9,000 man-made things flying in space. About 30% of these are satellites(卫星) , 10% are spaceships, 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 least4mmin size. A small piece of these even knocked a spaceship window and caused some damage.
Space is not only amazing but also dangerous. Although space is really dangerous, it interests many people on the Earth. In the near future, people may spend a few days in a space hotel. So we should do something to help improve the space environment.
(1) ____________is the greatest danger to spacemen in space.(完成句子)
(2) How many man-made things were flying in space according to the report?(回答问题)
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(3) What may people do in space in the near future?(回答问题)
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(4) _____________________________________________________(找出第三段的主题句)
(5) _____________________________________________________(翻译画线句子)