[W66] Lawrence Craven,a doctor form the USA,is the author of

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[W66] Lawrence Craven,a doctor form 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
请翻译,并分析.

翻译：劳伦斯·克莱文,一名来自美国的医生,他是几篇发表过的报告的作者.其中有一篇1953年的报告提出了阿司匹林可以减少心脏病风险的观点.
此题考查定语从句先行词和关系词的用法.
1.one of.前面没有and之类的连词,说明后句为非限制性定语从句,并非并列句,由此排除使用并列句结构的A；
2.what不能引导定语从句,排除C；
3.which代指前句中的several published reports,在句中做of的宾语；
定语从句中,one of which为主语,introduced为谓语,the idea为宾语,in 1953为时间状语.
4.其后的从句是同位语从句,解释宾语idea的具体内容,即“阿司匹林可以减少心脏病风险”是the idea的具体内容.
因为该从句不缺少任何成分,所以用that引导,that只起引导该同位语从句的作用.
5.如果使用when,则理解成定语从句,即：
when aspirin could reduce the risk of heart attacks
= in which aspirin could reduce the risk of heart attacks
= in 1953 aspirin could reduce the risk of heart attacks
则句意不通顺,因为“阿司匹林可以减少心脏病风险”是一个事实,而不能说“在1953年阿司匹林可以减少心脏病风险”.难道在这之前或以后时间里,阿司匹林就不可以减少心脏病风险吗?
由此排除答案D.

[W66] Lawrence Craven,a doctor form the USA,is the author of 英语翻译The USA is the short form of the United States of Americ He comes from the USA.He is a doctor. the author is supportive of both sides who is the author of the book the Sleeping Beauty? He borrowed a book the other day,the author(of which)is a wo The ----- of the article is a student named Nick A.author B. On front cover the books___(is/was) a picture of the author John is form the USA同义句转换John()()the USA is the capital of the USA. What is the language of the USA? washington is the _________ of the USA.