新GRE阅读考察面很多,主要考察的是学生的逻辑理解能力和推理能力，考生除了拥有大量的词汇以外，还需能够迅速了解出题者的意图。下面给大家准备了一些新GRE阅读的练习。
Drug companies lose money when manufacturing drugs that cure those suffering from rare diseases because selling a drug to only a few people usually does not recoup manufacturing expenses.Therefore, a company manufacturing any of the drugs that cure those suffering from loxemia, an extremely rare disease, will undoubtedly lose money.
Which of the following, if true, most seriously weakens the conclusion above?
(A)Several drugs that cure those suffering from loxemia also cure those suffering from very common illnesses.
(B)Most of those who contract loxemia also con-tract another illness concurrently.
(C)Most of the drug companies that manufacture drugs that cure rare diseases do not manufac-ture drugs that cure loxemia.
(D)A sizable number of people are afflicted with one or another rare disease even though each rare disease afflicts only a small number of people.
(E)The larger the amount of a drug that is manu-factured, the lower the manufacturing expense for each unit of the drug that is produced.
答案：C