[提问]OG11th, 57题

57、Among the more effective kinds of publicity that publishers can get for a new book is to have excerpts of it published in ahigh-circulation magazine soon before the book is published. The benefits of such excerption include not only a sure increase in sales but also a fee paid by the magazine to the book's publisher.

Which of the following conclusions is best supported by the information above?

(A) The number of people for whom seeing an excerpt of a book in a magazine provides an adequate substitute for reading the whole book is smaller than the number for whom the excerpt stimulates a desire to read the book.

(D) The dffectiveness of having excerpts of a book published in a magazine, measured in terms of increased sales of a bool, is proportional to the circulation of the magazine in which the excerpts are published.

答案：A

我觉得A明显是不对的，A明明就是题干的前提，而不是结论，我觉得应该是有A才能推到题目的结论，而不是题目的结论能够推到A。

A答案是能够被提干推出来的：a sure increase in sales 一定意味着：看了杂志上的摘录后，买书的人比不买书的人多。否则就相反了。这里你不能按照自己的理解认为A答案是提干的前提，一定要接受问题：is best supported by the information above. 也就是提干一定是选项的前提。

相反，我觉得D就很对，因为书的销售量随着在杂志上发表excerpt而得到提高，所以两者的关系"is proportional to"是对的。但是，ETS在解释中非说，D中的magazine一词太宽泛了，一定要限制在high-circulation magazine才是对的，我觉得有些吹毛求疵 

D答案可以举一个反例：如果杂志的销量很低，书的摘录在杂志上发表后，那么书的销量因此只有微弱的提高，那么，就不一定会有 a sure increase in sales.