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21. Historian: We can learn about the medical history of individuals through chemical analysis of their hair. It is likely, for example, that Isaac Newton’s psychological problems were due to mercury poisoning; traces of mercury were found in his hair. Analysis is now being done on a lock of Beethoven’s hair. Although no convincing argument has shown that Beethoven ever had a venereal disease, some people hypothesize that venereal disease caused his deafness. Since mercury was commonly ingested in Beethoven’s time to treat venereal disease, if researchers find a trace of mercury in his hair, we can conclude that this hypothesis is correct. Which one of the following is an assumption on which the historian’s argument depends? (A) None of the mercury introduced into the body can be eliminated. (B) Some people in Beethoven’s time did not ingest mercury. (C) Mercury is an effective treatment for venereal disease. (D) Mercury poisoning can cause deafness in people with venereal disease. (E) Beethoven suffered from psychological problems of the same severity as Newton’s. 答案是b . 我的疑问有3个: 1. Since mercury was commonly ingested in Beethoven’s time to treat venereal disease, 是作为前提,还是if researchers find a trace of mercury in his hair作为前提? 2. 对B选项取非, = all people in Beethoven’s time did not ingest mercury ? b是否=some people in Beethoven’s time ingested mercury? 3. 我选的答案是d, 但d的poisoning是个明显的错误.如果将d的posioning去掉,d是否是正确的? (去掉poisoning后取非, 也一样削弱结论). 和其他人讨论, 他们说d错是因为d的推理: M=> deafness, 但文中的结论是: V=>deafness, 所以d是错的. ??? 盼nn能予以作答, 先谢过了. | 
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发表于 2006-7-10 13:12:00
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