请教

ghfgss231

请教

14. Among the more effective kinds of publicity that publishers can get for a new book is to have excerpts of it published in a high-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. (B) Because the financial advantage of excerpting a new book in a magazine usually accrues to the book\'s publisher, magazine editors are unwilling to publish excerpts from new books. (C) In calculating the total number of copies that a book has sold, publishers include sales of copies of magazines that featured an excerpt of the book. (D) The effectiveness of having excerpts of a book published in a magazine, measured in terms of increased sales of a book, is proportional to the circulation of the magazine in which the excerpts are published. (E) Books that are suitable for excerpting in high- circulation magazines sell more copies than books that are not suitable for excerpting.

ghfgss231

虽然我做对题目了，但是，我不是很明白为什么D是support 呢？我觉得就是是无关呢。因为D只是说了一个关系（N=rM）. ，但是该关系没有说清楚到底能否increase sales, or increase fees paid by M.。 请大家讲讲D选项到底如何加强这个逻辑关系了，好吗？谢谢！

bfghdggf

我试试把我的解题思路讲一讲.

首先认真读题: 第一句(A), 可能是结论, 说在high-circulation的杂志上excerpting soon before publishing有效; 第二句是premises: increased sales (B1)和fees paid by M (B2). 所牵涉的事物: books, soon before it is published, high-circulation Mag, icreased sales, fees.

D是support题型的答案. 和A一样, 含有数学概念, 也极象正确答案. 但是我在以前的回复中讲过, 数学概念稍微复杂一些, A是很绝对的比较,N>M, 而D是间接的比较N=rM. 如果此等式不成立(取非),原结论成立吗? 当然. 如果N=M+p, 结论一样成立. 所以不是inference