黑体字： 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 黑体字: for a give level of output Delta's operation now causes less fossil fuel to be consumed than it did formerly. The answer, clearly , is year, 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. 答案是B。 我的想法：老师，这道题我非常不理解B，我选的A。 抛出第一个黑体字不说，第二个怎么看也不像identifies the content of that conclusion.啊？ 我换个通俗一点的说法麻烦老师看一下，这篇文章可以这么说： 1. （黑体字）英吉打管卫东 2. the question has been raised whether it can be concluded that (黑体字）英吉喝水 3. the answer is year since....... 我不知道我这么陈述合适否，但如果合适，条件黑体1难道不是结论么？条件黑体2难道不是支持这个结论的么？困扰了我很久，谢谢老师

黑体字： 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 黑体字: for a give level of output Delta's operation now causes less fossil fuel to be consumed than it did formerly. The answer, clearly , is year, 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. 答案是B。 我的想法：老师，这道题我非常不理解B，我选的A。 抛出第一个黑体字不说，第二个怎么看也不像identifies the content of that conclusion.啊？ 我换个通俗一点的说法麻烦老师看一下，这篇文章可以这么说： 1. （黑体字）英吉打管卫东 2. the question has been raised whether it can be concluded that (黑体字）英吉喝水 3. the answer is year since....... 我不知道我这么陈述合适否，但如果合适，条件黑体1难道不是结论么？条件黑体2难道不是支持这个结论的么？困扰了我很久，谢谢老师