请教：题干中有if，only if或者答案中有这些词时有没有解题技巧？

flyingwings · 发表于 2005-6-19 10:38:00

请教：题干中有if，only if，if only或者答案中有这些词时有没有什么解题技巧？

举一例题，希望各位能帮忙讲讲解题思路，谢谢先！

og178. In countries in which new life-sustaining
drugs cannot be patented, such drugs
are sold at widely affordable prices; those same drugs, where patented, command
premium prices because the patents shield patent-holding
manufacturers from competitors. These facts show that future access to new
life-sustaining drugs can be improved if the practice of granting patents on newly developed
life-sustaining drugs were to be abolished everywhere.

Which of the following, if true, most seriously
weakens the argument?

(A) In countries in which life-sustaining drugs
cannot be patented, their manufacture is nevertheless a profitable enterprise.

(B) Countries that do not currently grant patents
on life-sustaining drugs are, for the most part, countries with large
populations.

(C) In some countries specific processes for the
manufacture of pharmaceutical drugs can be patented even in cases in which the
drugs themselves cannot be patented.

(D)
Pharmaceutical companies can afford the research that goes into the development
of new drugs only if patents allow them to earn high profits.

(E) Countries that grant patents on
life-sustaining drugs almost always ban their importation from countries that do
not grant such patents.

答案是D。

请教：题干中有if，only if或者答案中有这些词时有没有解题技巧？

请教：题干中有if，only if或者答案中有这些词时有没有解题技巧？

所属分类: GMAT考试

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