求助。。og13 98句子作用题，，，一点头绪都木有。。。

mogu724

98. Delta Products Inc. has recently switched at least partly from older technologies using fossil fuels to new technologies powered by electricity. The question has been raised whether it can be concluded that for a given level of output Delta’s operation now causes less fossil fuel to be consumed than it did formerly. The answer, clearly, is yes, since the amount of fossil fuel used to generate the electricity needed to power the new technologies is less than the amount needed to power the older technologies, provided level of output is held constant.

In the argument given, the two boldfaced portions play which of the following roles?

(A) The first identifies the content of the conclusion of the argument; the second provides support for that conclusion.

(B) The first provides support for the conclusion of the argument; the second identifies the content of that conclusion.

(C) The first states the conclusion of the argument; the second calls that conclusion into question.

(D) The first provides support for the conclusion of the argument; the second calls that conclusion into question.

(E) Each provides support for the conclusion of the argument.

正确答案是b
关于第二句的解释我怎么也想不明白。。。求NN解答

elsachialee

题目三句话。第二句黑体字部分显然是一个结论，有it can be concluded that...引导。第一句，说明了一个情况，DP这个公司干了什么。就是把一部分旧技术换成了新技术。第三句，provides the support of the conclusion,提供证据解释了这个结论。因为产量一直的前提下，所使用的fossil fuel去发动新技术所需的电比就技术所需的电量要少。

B是说，第一句话支持结论，第二句阐述结论的内容（就是结论是什么）。

我觉得这个题目用排除法比较容易。首先，第二句的黑体字部分肯定是一个结论，所以排除A C D E了。

求批判。

mogu724

elsachialee 发表于 2013-8-25 03:33
题目三句话。第二句黑体字部分显然是一个结论，有it can be concluded that...引导。第一句，说明了一个情 ...

哦哦明白l 谢谢谢！！