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发布时间: 1970-01-01

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1最佳选择题 3分

Attheendofthepassagetheauthorsuggeststhat

  • A. it is impossible for life to exist on other planets.
  • B. earthlike life could only exist on a few planets.
  • C. life could exist on only one planet in a million.
  • D. life could exist on a great number of planets.
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本题解析: 暂无解析

2最佳选择题 3分

Thepassagementionsallofthefollowingfactorsfortheex

  • A. the right amount of atmosphere.
  • B. a steady supply of water.
  • C. steady heat and light.
  • D. the right distance from the sun.
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本题解析: 暂无解析

3最佳选择题 3分

WhichofthefollowingstatementsisINCORRECT?

  • A. Astronomers believe that the universe is built of the same matter.
  • B. Proper conditions are essential to the existence of life.
  • C. Double stars can provide steady light and heat.
  • D. Astronomers believe that other solar systems are similar in structure to ours.
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本题解析: 暂无解析

4最佳选择题 3分

Whatkindofplanetelsewhereintheuniversecansupportli

  • A. Those double stars' planets.
  • B. Those planets much hotter than our earth.
  • C. Those planets similar to the earth.
  • D. Those planets very close to their suns.
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本题解析: 暂无解析

5最佳选择题 3分

Astronomersbelievethatmatterindifferentpartsoftheu

  • A. obeys different laws.
  • B. obeys one common law.
  • C. obeys the same laws.
  • D. obeys no common law.
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本题解析: 暂无解析

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