求助FeiFei逻辑的一道题目~谢谢诸位^-^

fay009

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。可能是我整个题目都没有怎么看懂吧。。看完详解也还是不理解。。我觉得应该选择A吧。。如果吸收进去的mercury都可以eliminate掉。。那头发里面可能都不会有了啊。。？

轩辕gossip

同问同问，我也选A···我觉得B有点莫名其妙啊 ···

hughlv

我认为A是个无关选项。文中的推断是试图建立mercury和venereal disease之间的联系，跟mercury本身是否不会被eliminate并没有联系。如果mercury可以被eliminate，那么后果就是科学家将从头发中找不到mercury，那既不能证明也不能反对mercury与venereal disease之间的联系。

这个推断的最关键之处在于，如何将mercury与venereal disease建立起对等的关系，即mercury只用于治疗venereal disease，因此人体不会因为其他原因摄入mercury（比如化妆品或者长生不老药之类）。

B选项看起来也不是很对劲，但用排除法的话也就只能选他了。证明mercury确实是用于某种特定目的，而不是生活必需品比如自来水中就包含的。

轩辕gossip

有道理，这么一说可以理解了··谢谢！

fay009

谢谢2L^-^