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发布时间: 1970-01-01

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1最佳选择题 3分

SomescientiststhinktheremayhavebeenlifeontheMarsin

  • A. there is no life there now
  • B. there is a large amount of water at the poles
  • C. the Mars may be able to support life in the future
  • D. conditions may have been similar to those on the Earth
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正确答案: -

本题解析: 暂无解析

2最佳选择题 3分

TherecouldbelifeontheMarsinthefutureif______.

  • A. it supported life in the past
  • B. certain gases are used to cool the planet
  • C. the atmosphere can be heated enough to grow simple plants
  • D. the planet’s volcanoes become as active as they were in the past
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正确答案: -

本题解析: 暂无解析

3最佳选择题 3分

PeoplemaybeabletoliveontheMars______.

  • A. within the next 200,000 years
  • B. only 200,000 years from now
  • C. only 150,000 years from now
  • D. as soon as the planet becomes cool enough
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正确答案: -

本题解析: 暂无解析

4最佳选择题 3分

Theauthor'sattitudetowardsthepossibilityoflifeonth

  • A. doubtful
  • B. positive
  • C. negative
  • D. uninterested
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正确答案: -

本题解析: 暂无解析

5最佳选择题 3分

Whichisthebesttitleforthispassage

  • A. The Possibility of Life on the Mars
  • B. Future Conditions on the Mars
  • C. The Mars and the Earth
  • D. A Study of the Climate of the Mars
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正确答案: -

本题解析: 暂无解析

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