Lawrence Craven, a doctor from the USA, is the author of several published repor
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Lawrence Craven, adoctor from the USA, is the author of several published reports, one of _______introduced the idea in 1953 _______ aspirin could reduce the risk of heartattacks.
A. them;when B.which; that C.what; that D. which; when
试题答案
【答案】
B
【解析】