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【求问】各路大神。 OG13 CR67

这道题怎么都想不明白。
希望大家帮我解答一下!!!谢谢!!!
67. 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.

请问这个B为什么不对。OG上的解释实在不太明白。
manufacture the machinery in the technology 不能看做是operation 的一部分么????
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我对B项是这么理解的,B项说制造机器比以前用的燃料少了,而题目中的

意思是使用新机器比使用旧机器消耗的能源少,应该指的是用这些机器制造

东西而不是制造这些机器,这样的话,B项与内容相符程度小,不能支持。

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谢谢!!

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