L 6-3-24

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24. Rumored declines in automobile-industry revenues are exaggerated. It is true that automobile manufactures’ share of the industry’s revenues fell from 65 percent two years ago to 50 percent today, but over the same period suppliers of automobile parts had their share increase from 15 percent to 20 percent and service companies (for example, distributors, dealers, and repairers) had their share increase from 20 percent to 30 percent.

Which one of the following best indicates why the statistics given above provide by themselves no evidence for the conclusion they are intended to support?

(A) The possibility is left open that the statistics for manufactures’ share of revenues come from a different source than the other statistics.

(B) No matter what changes the automobile industry’s overall revenues undergo, the total of all shares of these revenues must be 100 percent.

(C) No explanation is given for why the revenue shares of different sectors of the industry changed.

(D) Manufactures and parts companies depend for their revenue on dealers’ success in selling cars.（B）

(E) Revenues are an important factor but are not the only factor in determining profits.

答案是B，为什么？所有的renvenue 加起来是100％；以前：

auto-manufacture: 65% + automobile parts 15% + sevice companies (20%) = 100%

现在： auto-manufacture: 50% + automobile parts 20% + service (30%) = 100%

What's wrong? So I don't feel any answer here is right.

teyvhf

B 的意思为不管汽车行业中的各部分（如：零件部分，服务部分）收入比例如何变，全部加起来还是100%。也就是说，虽然上述两部分SHARE增加，汽车行业的其它部分相应减少，全部加起来还是100%。文中两部分的SHARE是指他们在汽车行业中的SHARE，不是占总收入的SHARE。