OG逻辑67 求助啊！！！！

yuyang0206

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.
Which of the following, if true, most strengthens the argument above?
(A) Many of the industries that have switched at least partly to the new technologies have increased their
output.
(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.
(C) More electricity is used by those industries that have switched at least partly to the new technologies than
by those industries that have not switched.
(D) Some of the industries that have switched at least partly to the new technologies still use primarily
technologies that are powered by fossil fuels.
(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.

我选的是B，正选是E，我觉得B直接就说了new technologies 下machine要的fossil fuel要少啊，所以就直接加强结论了哈
纠结死了，谢谢~

kikisunflower

The conclusion of this argument focus on the fossil fuels used by "these industries", which refers to the industries that "use" the new machines rather than those that "manufacture" the new machines.
The answer B discuss industries that "manufacture" the new machines and should be considered irrelevant choice.

小意达de花儿

我觉得哈，题目中的结论是针对operations of these industries ，而B中提到manufacture我们不知道它是否包含在“these industries”中。B的缺陷是manufacture也许并不包含在题干中说的“Several industries have recently switched at least partly from older technologies powered by fossil fuels to new technologies powered by electricity. ”

玉軒

非常感谢，终于明白了。

yxyqm

The conclusion of this argument focus on the fossil fuels used by "these industries", which refers to the industries that "use" the new machines rather than those that "manufacture" the new machines.
The answer B discuss industries that "manufacture" the new machines and should be considered irrelevant choice.

-- by 会员 kikisunflower (2011/4/26 17:09:55)

好样的~~~俺也懂啦