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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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Lawrence Craven,a doctor from the USA,is the author of several published reports,one of     ________introduced the idea in 1953      aspirin could reduce the risk of heart attacks.

A.them; when B.which; that C.what;that D.which; when
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LawrenceCraven,adoctorfromtheU