陈向东逻辑题

jeans2011 · 发表于 2012-7-25 11:18:48

19. Studies have shown that people who rarely take antibiotics, which are antibacterial drugs, have stronger immune systems than do people who take antibiotics frequently. Yet there is no evidence that taking antibiotics weakens the immune system.
Which of the following, if true, best reconciles the apparent discrepancy in the information above?
A. people who have strong immune systems seldom get the kinds of infections for which people normally take antibiotics.
C. People who have weak immune systems have great difficulty recovering from bacterial infections if they do not take antibiotics.
答案是A，为什么不能选C呢？

陈向东逻辑题

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