OG12 CR67

wyw1018

Several industries have recently switched at least partly from older technologies powered by fossil fuels to new technologies powered by electricity. It is thus evident that less fossil fuel is being used as a result of the operations of these industries than would have been used if these industries had retained their older technologies.

B. less fossil fuel was used to manufacture the machinery employed in the new technologies than was originally used to manufacture the machinery employed in the older technologies.
E. The amount of fossil fuel used to generate the electricity needed to power the new technologies is less than the amount that would have been used to power the older technologies.


B选项为什么不对...我觉得意思和E选项差不多阿。求教！

avagmat

要这么说E也不见得，因为假设新技术生产过程中的fuel用量上，但生产新技术应用于的机器时候所需要的fuel多。

要说考虑的是生产过程中的用量也对，support题假设下面的对，反正B也是support了原文结论。

wyw1018

没注意operation和machinery的区别，谢啦！

masushuang

manufacture machine所用的fossil fuel与题目讨论主题无关。
我们假设B是对的，那么也不能strengthen the argument。因为，新技术下生产机器所用fuel减少并不意味着在实际工作过程中所用fuel就一定减少。

running2k

B中文章说的是operation而不是machinery，比较operation那只能在amount上面比较了，所以B错