[求助]ff－135的第25题

25. There should be a greater use of gasohol. Gasohol is a mixture of alcohol and gasoline, and has a higher octane rating and fewer carbon monoxide emissions than straight gasoline. Burning gasohol adds no more carbon dioxide to the atmosphere than plants remove by photosynthesis.
Each of the following, if true, strengthens the argument above EXCEPT:
(A) Cars run less well on gasoline than they do on gasohol.
(B) Since less gasoline is needed with the use of gasohol, an energy shortage is less likely.
(C) Cars burn on the average slightly more gasohol per kilometer than they do gasoline.
(D) Gasohol is cheaper to produce and hence costs less at the pump than gasoline.
(E) Burning gasoline adds more carbon dioxide to the atmosphere than plants can remove.

C是答案，我在C、B中徘徊了很久。B说能源短缺的可能性减少，但在题干中我没找到任何关于能源问题的讨论。

C当时我排除的时候是觉得它稍微加强了第一句话。

所以我就选B。

open disscusion。。。

本题的conclusion是:There should be a greater use of gasohol.

注意该conclusion的用的是should不是will,即此conclusion不是在预测gasohol的使用将要上升而是说由于gasohol有下面的这些好处所以应该使用gasohol.

B中的energy shortage虽然没有提到,但是节约能源防止能源危机确实是好处之一,所以是加强.

C说用gasohol的消耗量大,这是说gasohol的坏处是削弱.

所以选C