求教ＧＷＤ１５－３２

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 that the level of output is held constant.

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

1. The first identifies the content of the conclusion of the argument; the second provides support for that conclusion.
2. The first provides support for the conclusion of the argument; the second identifies the content of that conclusion.
3. The first states the position that the argument opposes; the second states the conclusion of the argument.
4. Each provides evidence that calls the conclusion of the argument into question.
5. Each provides support for the conclusion of the argument

个人觉得应该是Ａ，答案是Ｅ，为什么啊？？？？？

弄清两点就明白答案为E

1。结论：for a given level of output, Delta’s operation now causes less fossil fuel to be consumed than it did formerly。意思为该公司现在的生产比以前的生产用的燃料少。

2。结论中的operation不是指第一句的该公司的switch, 而是指该公司利用新技术进行的生产。

原文两个黑体部分是前提，支持结论。

可是第一句不是提供了背景资料嘛

背景资料也是广义的前提，支持结论。另外，选项的对错界限比较明朗，如果你觉得两个选项很难分清对错，也可以对，也可以错，则说明没有找到对错的理由。

>弄清两点就明白答案为E

>1。结论：for a
given level of output, Delta’s operation now causes less fossil fuel to
be consumed than it did formerly。意思为该公司现在的生产比以前的生产用的燃料少。

>2。结论中的operation不是指第一句的该公司的switch, 而是指该公司利用新技术进行的生产。

同意以上两点，但是第一个黑体只是个事实性的描述，应该时中性的；而结论说的是省燃料，黑体1“Delta products, Inc., has recently switched at least
partly from older technologies using fossil fuels to new technologies powered
by electricity.  ”其结果既可能是省也可能是费，其本身不应起到对结论的支持作用吧。

我还是支持A，黑体1确定结论的内容，黑体2支持。

...

...lawyer_1是大牛 但是俺还是觉得A好