选E: 大家注意,涂黄部分如果替换为minor part, " Delta products, Inc., has recently switch at least partly from older technologies using fossil fuels to new technologies powered by electricity" ,这句话的感觉就是加强的反面--削弱了。
答案E,偶当时错选A。看完反思,觉得死得其所,是共军太狡猾!BF1确认DELTA个别性——采用新技术,BF2确认普遍性——新技术比旧的省油;而结论在中间:Delta’s operation now causes less fossil fuel to be consumed than it did formerly.
aph7, today I have done this question. I agree A :
BF1 is the phenomena and topic which the debate is based on ,so it is impossible to support any of the sides. Suppose that the conclusion is opposite ,Can u say BF1 supports it.No way.
the content of the conclusion of the argument is :for a given level of output, Delta's operation now causes less fossil fuel to be consumed than it did formerly, the first is not the content of the conclusion, so A is wrong.
I don't think E is perfect, either, but I can't find anything better.