请教FEIFEI逻辑38题

Janelb · 发表于 2013-2-8 12:25:56

38. Amphibianpopulations are declining in numbers worldwide. Not coincidentally, the earth’sozone layer has been continuously depleted throughout the last 50 years.Atmospheric ozone blocks UV-B, a type of ultraviolet radiation that iscontinuously produced by the sun, and which can damage genes. Becauseamphibians lack hair, hide, or feathers to shield them, they are particularlyvulnerable to UV-B radiation. In addition, their gelatinous eggs lack theprotection of leathery or hard shells. Thus, the primary cause of the decliningamphibian population is the depletion of the ozone layer.

Each of thefollowing, if true, would strengthen the argument EXCEPT:

A. Of the various types ofradiation blocked by atmospheric ozone, UV-B is the only type that can damagegenes.
B. Amphibian populations aredeclining far more rapidly than are the populations of non-amphibian specieswhose tissues and eggs have more natural protection from UV-B.
C. Atmospheric ozone has beensignificantly depleted above all the areas of the world in which amphibianpopulations are declining.
D. The natural habitat ofamphibians has not become smaller over the past century.
E. Amphibian populations havedeclined continuously for the last 50 years.
答案是D，可是我觉得D有STRENGTHEN的作用啊，它排除了其他的一种可能原因。另外关于A，说UV-B仅一种，我觉得不管有没有另一种，都不能STRENGTHEN OR WEAKEN啊，毕竟题干是说OZON的减少是直接原因啊。谢谢帮助。

请教FEIFEI逻辑38题

所属分类: GMAT考试

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