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托福阅读词汇题:objective

2015-08-18 16:38:18来源:网络

  【托福阅读题型:objective词汇题】托福阅读中词汇题是重要题型之一。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词汇题

  托福阅读词汇题:objective

  【Paragraph 1】In 1970 geologists Kenneth J. Hsu and William B.F. Ryan were collecting research data while  aboard the oceanographic research vessel Glomar Challenger. An objective of this particular cruise was to investigate  the floor of the Mediterranean and to resolve questions about its geologic history. One question was related to evidence  that the invertebrate fauna (animals without spines) of the Mediterranean had changed abruptly about 6 million years ago. Most of the older organisms were nearly wiped out, although a few hardy species survived. A few managed to migrate into the Atlantic. Somewhat later, the migrants returned, bringing new species with them. Why did the near extinction and migrations occur?(The Geologic History of the Mediterranean)

  The word “objective” in the passage is closest in meaning to

  ○achievement

  ○requirement

  ○purpose

  ○feature

  答案见下一页:

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