标题: 求解~！！GWD中一道逻辑题.. [打印本页] 作者: yc0428 时间: 2010-9-2 23:21 标题: 求解~！！GWD中一道逻辑题.. The ancient Nubians inhabited an area in which typhus occurred, yet surprisingly few of their skeletons show the usual evidence of this disease. The skeletons do show deposits of tetracycline, an antibiotic produced by a bacterium common in Nubian soil. This bacterium can flourish on the dried grain used for making two staples of the Nubian diet, beer and bread. Thus, tetracycline in their food probably explains the low incidence of typhus among ancient Nubians.
Which of the following is an assumption on which the argument relies?
A. The tetracycline deposits did not form after the bodies were buried. B. The diseases other than typhus to which the ancient Nubians were exposed would not be affected by tetracycline. C. Typhus is generally fatal. D. Nubian grain became contaminated with tetracycline-producing bacteria prior to being harvested. E. Bread and beer were the only foods eaten by the ancient Nubians which could have contained tetracycline.
A的否定：tetracydline是在死后才进入人体的，就证明了结论tetracycline in their food probably explains the low incidence of typhus among ancient Nubians不对，因为tetracydline根本就不是来自于food.作者: yc0428 时间: 2010-9-3 10:33
原来是这样~！我明白了~~ 非常感谢！！！作者: wuyw2010 时间: 2010-9-3 11:02
取非来判断，A如果tetra deposits form after the bodies were buried，那么就不能说明是food里的tetra造成的作者: 流浪的心 时间: 2010-9-20 16:31
这种assumption的题目就可以取非来判断