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托福词汇440题(110):concentrated

2014-04-29 08:35:00来源:新东方在线整理

  托福词汇440题第110题

  For example, the edge of the Pacific Ocean has been called the "Ring of Fire" because so many volcanic eruptions and earthquakes happen there. Before the 1960's, geologists could not explain why active volcanoes and strong earthquakes were concentrated in that region.

  The word "concentrated" is closest in meaning to which of following?

  (A) allowed

  (B)clustered

  (C) exploded

  (D) strengthened

  答案见第2页

  

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