22．LawrenceCraven,adoctorfromt

更新 2022-09-03
科目英语
题型单选题
难度容易
浏览 2002

22．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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