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GRE阅读逻辑题训练(73)

2017-04-04 09:15:00来源:新东方在线整理

  为了帮助大家练习GRE阅读逻辑题,新东方在线GRE频道为大家带来GRE阅读逻辑题训练(73)一文,希望对大家GRE备考有所帮助。更多精彩尽请关注新东方在线GRE频道!

  The early universe contained only the lightest elements, hydrogen and helium. Heavier elements, such as carbon, form only in nuclear reactions in stars and are dispersed when the stars explode. A recently discovered gas cloud contained carbon several billion years ago, when the universe was no more than two billion years old.

  If the statements above are true, which of the following must, on the basis of them, also be true?

  A:The earliest stars contained only hydrogen.

  B:Some stars were formed before the universe was two billion years old

  C:The carbon in the gas cloud later formed part of some stars.

  D:No stars identified to date are as old as the gas cloud.

  E:The gas cloud also contained hydrogen and helium.

  最佳解析:本题是一道归纳题,此类题在近来国内考题中越来越少,体现出GRE逻辑考试的趋势,即减少要求阅读能力高的归纳题而增加要求逻辑能力强的演绎题及逻辑关系描述的考题。上文中说明诸如碳这样的较重元素仅仅在星体核反应中产生,而在几十亿年前的星云中含有碳,说明一些星星形成于二十亿年以前,所以(B)is correct。

  答案:B

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  以上就是新东方在线GER频道为你带来的GRE阅读逻辑题训练题目,更多精彩敬请关注新东方在线GRE频道。

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