求大神指导！feifei的题目 - ChaseDream

Historian: We can learn about the medicalhistory of individuals through chemical analysis of their hair. It is likely,for example, that Isaac Newton’s psychological problems were due to mercurypoisoning; traces of mercury were found in his hair. Analysis is now being doneon a lock of Beethoven’s hair. Although no convincing argument has shown thatBeethoven ever had a venereal disease, some people hypothesize that venerealdisease caused his deafness. Since mercury was commonly ingested in Beethoven’stime to treat venereal disease, if researchers find a trace of mercury in hishair, we can conclude that this hypothesis is correct.