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托福阅读句子简化题:Meteorite Impact

2015-08-13 15:46:03来源:网络

  【托福阅读题型:Meteorite Impact句子简化题】托福阅读中句子简化题是重要题型之一。根据托福阅读题型不同来进行专项练习,是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

  查看全部:托福阅读题型分类练习之句子简化题

  托福阅读句子简化题:Meteorite Impact

  【Paragraph 7】Earth is a target in a cosmic shooting gallery, subject to random violent events that were unsuspected a few decades ago. In 1991 the United States Congress asked NASA to investigate the hazard posed today by large impacts on Earth. The group conducting the study concluded from a detailed analysis that impacts from meteorites can indeed be hazardous. Although there is always some risk that a large impact could occur, careful study shows that this risk is quite small.(Meteorite Impact and Dinosaur Extinction)

  Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.

  ○ Until recently, nobody realized that Earth is exposed to unpredictable violent impacts from space.

  ○ In the last few decades, the risk of a random violent impact from space has increased.

  ○ Since most violent events on Earth occur randomly, nobody can predict when or where they will happen.

  ○ A few decades ago, Earth became the target of random violent events originating in outer space.

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