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职称英语理工类辅导资料:阅读理解Life Form Found(二)

2012-12-15  来自于:课评集

  2. What do scientists say about Titan?

  A There are life clues there.

  B There is acetylene there.

  C Water on Titan exists in the form of ice.

  D Rivers and lakes there contain life formls.

  3. To date,scientists have not yet detected this form of life.(paragraph 5)What does"this form of life" refer to?

  A Water-based life.

  B Methane-based life.

  C Liquid-water-based microorganisms.

  D Gas-based life.

  4. What can be inferred from what Allen said?

  A Scientists have different arguments over whether there is life on Titan.

  B Scientists all agree that there is life on Titan.

  C Scientists all suggest that a biological explanation is reasonable.

  D Scientists all agree that a non-biological chemical reaction is a possible explanation.

  5. Which of the following can replace the title of this passage?

  A Earthlike Living Beings Found on Titan.

  B Finding of One More Moon of Saturn.

  C Titan,a New Satellite Found.

  D A different Life Form, a Possibility.

  答案与题解:

  1. C 短文的第一段提供了答案。该段告诉读者,科学家在土星的卫星土卫六( Titan )上发现了生命的迹象,这些生命的存在是以甲烷为基础的。

  2.A根据第二段"Scientists have reportedly discovered clues showing primitive alien beings are "breathing" in Titans dense atmosphere filled with hydrogen.",说明土卫六(Titan)有生命迹象。因此A是答案。

  3. B this form of life 指的是土卫六( Titan )上以甲烷为生命基础呼吸氢气的生物,即该文讨论的主题。

  4.A科学家至今对土卫六是否存在生物有不同的观点和解释。Allen 说要做出土卫六上有生

  物的结论,首先必须对Titan 上没有生物的观点做出回应;要排除土卫六上可能没有生物的观点,我们还须付出努力。所以只有A是正确选择。

  5.D该短文的主题是,科学家在土卫六( Titan )上发现了一种与地球生物不同的生命形式的迹象,即以甲烷为生命基础呼吸氢气的生物,但科学家还未能最后验证这一发现。第四段中的一个句子能够揭示该短文的主题:"If these signs do turn out to be a sign of life, it would bedoubly exciting because it would represent a second form of life independent from water-based life on Earth."