题干

Lawrence Craven, a doctor from the USA, is the author of several published reports, one of which introduced the idea in 1953 ________ aspirin could reduce the risk of heart attacks by thinning blood.
A.whenB.whereC.thatD.which
上一题 下一题 0.64难度 单项选择 更新时间:2013-05-08 04:24:18

答案(点此获取答案解析)