标题: Feifei 逻辑宝典25求助 [打印本页] 作者: girlwithwings 时间: 2009-12-19 12:55 标题: Feifei 逻辑宝典25求助 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.
我的理解是———E选项是argument最后一句的相反意思,所以weaken argument.作者: croustillant 时间: 2009-12-19 18:25
E. Burning gasoline adds more carbon dioxide to the atmosphere than plants can remove. E是加强吧。。。Burning gasohol 产生的二氧化碳能被光合作用吸收(文中说),E说Burning gasoline 产生的二氧化碳不能被光合作用完全吸收。强对比哦。。。作者: girlwithwings 时间: 2009-12-20 02:52
如果E与文中是强对比,(感觉意思是相反)