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题型:短文填空-首字母填空 难度:0.65 引用次数:251 题号:13121300

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.

Humans cannot survive (活下来) without water, oxygen or f    5    . So far, nobody knows whether there would be enough water or oxygen on Mars for people there. Moreover, scientists are not sure whether plants could g    6     on Mars. Food would most probably be in the form of pills (药丸) and would not be so tasty.

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).

【知识点】 天体与宇宙 畅想未来

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