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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. 本题我有一点不懂,题目中的前提是:if mercury is found in his hair conclusion is venereal cause his death. 那么假设应该为 mercury often be used to treat venereal and venereal is the only ill be treated by mercury .right?? 然后,文中已经给了mercury often be used to treat venereal 那么假设就应该是 venereal is the only ill……, 可是解释中说“The 1st assumption of the author is that only venereal disease will be treated by mercury in Beethoven’s time. The 2nd assumption is only some people in Beethoven's time will ingest mercury,”想问下第二个假设是怎么来的??只有一部分人用和全部人用友什么区别,只要知道在他的时代,大家都用mercury来治疗花柳不就行了吗 |
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