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新托福阅读词汇150题(61):tentatively identified

2015-08-13 10:43:19来源:网络

  【新托福阅读词汇150题(61):tentatively identified新托福TPO阅读中,词汇题是重要托福阅读题型。托福阅读词汇题做题需要考生掌握一定的词汇量和做题技巧。本文中新东方在线托福网汇总了新托福阅读词汇150题:tentatively identified

  Paragraph 5: Several other mass extinctions in the geological record have been tentatively identified with large impacts, but none is so dramatic as the Cretaceous event. But even without such specific documentation, it is clear that impacts of this size do occur and that their results can be catastrophic. What is a catastrophe for one group of living things, however, may create opportunities for another group. Following each mass extinction, there is a sudden evolutionary burst as new species develop to fill the ecological niches opened by the event. 【Official Model Exam- Meteorite Impact and Dinosaur Extinction】

  8. The phrase “tentatively identified” in the passage is closest in the meaning to

  ○ identified after careful study

  ○ identified without certainty

  ○ occasionally identified

  答案见下一页:

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