标题: 狒狒21。。好搞呀。。 [打印本页] 作者: 仙蒂瑞拉 时间: 2009-11-24 23:13 标题: 狒狒21。。好搞呀。。 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.
ANSWER:B. A和C究竟哪里不对啊？。。作者: w3d001 时间: 2009-11-25 09:19
我不是牛。。但是我来乱一下， 1.这到题的答案不是。。。。A么。。。记忆中 因为 mercury was commonly ingested in Beethoven’s time to treat venereal disease, if researchers find a trace of mercury in his hair 所以 venereal disease caused his deafness 附加条件是if可以找到mercuy。。。 所以假设是 None of the mercury introduced into the body can be eliminated 就是原先注射的mercuy没有消失，可以被trace 。如果不是的话。就根本找不到mercur 没有满足if条件，结论自然不能hold作者: 仙蒂瑞拉 时间: 2009-11-25 12:50
是B。。我确定的。。而且我也是这么考虑A的，有的地方说A是无关选项，但是我觉得他们蛮相关的。。作者: nancy1010 时间: 2009-11-26 01:15
我也选的A....作者: naughtyboy 时间: 2009-11-26 11:38
结论说如果发现汞（汞是用来治疗心血管病的）可以说明有心血管病，都说发现汞了，就算汞可以被消除也不能说明结论不成立阿
A的干扰在于, 对None of 取非的结果是什么? 绝对不是All of, 而是Some of Some of ... can be eliminated, 在头发中就一定找不到M吗? 不见得啊..只要留下一部分足以被发现就可以了啊, 所以, A不成立, 结论并非不成立, 同样也有可能成立的, 在做这种逻辑题目的时候, None of 是很危险的选项, 不能随便乱选的.