feifei-38题请教，答案到底是A还是D?

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

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

A.      
Of the various types of
radiation blocked by atmospheric ozone, UV-B is the only type that can damage
genes.

B.       
Amphibian populations are
declining far more rapidly than are the populations of non-amphibian species
whose tissues and eggs have more natural protection from UV-B.

C.       
Atmospheric ozone has been
significantly depleted above all the areas of the world in which amphibian
populations are declining.

D.      
The natural habitat of
amphibians has not become smaller over the past century.

E.       
Amphibian populations have
declined continuously for the last 50 years.

答案：D

思路：原文论述臭氧层的破坏造成UV-B辐射过量是导致两栖动物数量减少的主要原因。

A：支持说明为什么是UV-B而不是其他原因。

B：支持说明为什么UV-B会降低两栖动物的数量。

C：提供空间论据说明臭氧层受损和两栖动物数量减少的相关性。

D：中性评价。不Weaken也不Strengthen.

E：提供时间论据说明臭氧层受损和两栖动物数量减少的相关性。

很奇怪哦，费费逻辑宝典的题目版却清清楚楚写着该题的答案是A，而且我也认为应该是A

D这个答案是支持的。因为它是排除他因，排除了由于生态环境原因引起的两栖动物减少。

而A其实是无关的。要说明的结论是臭氧层的depletion造成两栖动物减少，至于UV-B是“only” 有害的物质与否没有太大关系。

大家都来说说。