请教GWD-TN24-20套34题 即GWD30-Q34

yaoyaoer

34. GWD30-Q34:

Books in European libraries last longer than books in libraries in the United Statesbecause, although the climate in Europe is fairly humid, libraries there are not subjected to the extremes of temperature and humidity that damage collections in the United States
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A.because, although the climate in Europe is fairly humid, libraries there are not subjected to the extremes of temperature and humidity that

B.because, although the climate in Europe is fairly humid, libraries there are not subject of the extremes of temperature and humidity as those that

C.because, although the climate in Europe is fairly humid, libraries there are not subjected to the extremities of temperature and humidity as

D.because the climate in Europe is fairly humid, but still libraries there are not subject of the extremes of temperature and humidity as

E.because the climate in Europe is fairly humid, but libraries there are not subjected to the extremities of temperature and humidity such as those that
答案选a,为什么用as引导错误呢？

小妖藏尼

同问 为什么as引导错误？？！