21. 我也认为答案应为A. 将C取非, even if mercury is not an effective treatment for venereal disease, it is likely that mercury can be introduced into beethoven's body. so the result can not weeken the conclusion.
24. b 是无关选项, 并无提出证据否定结论中的the size of the interstitial nucleus 与 diseases 相关. 相反, E是明显的断桥型削弱, 直接说明 hypothalamu 与disease Y 无关, disease X 是disease y 的子集,自然 hypothalamu 与disease X 无关.
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发表于 2003-10-1 15:58:00
