大全-I-12 A newly discovered disease is thought to be caused by a certain bacterium. However, recently released data notes that the bacterium thrives in the presence of a certain virus, implying that it is actually the virus that causes the new disease. Which of the following pieces of evidence would most support the data’s implication? (A) In the absence of the virus, the disease has been observed to follow infection by the bacterium. (B) The virus has been shown to aid the growth of bacterium, a process which often leads to the onset of the disease. (C) The virus alone has been observed in many cases of the disease. (D) In cases where the disease does not develop, infection by the bacterium is usually preceded by infection by the virus. (E) Onset of the disease usually follows infection by both the virus and the bacterium. 看了前人的解释，还是不太明白，总觉得C说的是many cases of disease是无关的事情。请NN们给再讲讲，谢谢。
本题是支持the data’s implication，即it is actually the virus that causes the new disease.也就是说，找出选项说明，是virus 而不是bacterium引起了这种病。而选项c说，在这种病的许多病例中，只有virus被观察到（或者说只有virus，而bacterium不存在），所以 support the data’s implication：it is actually the virus that causes the new disease.
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发表于 2005-8-8 08:35:00
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