在求教：大全I-18，A怎么就对了？E为何不行

taixiKim

18. Critics of sales seminars run by outside consultants point out that since 1987, revenues of vacuum cleaner companies whose employees attended consultant-led seminars were lower than revenues of vacuum cleaner companies whose employees did not attend such seminars. The critics charge that for vacuum cleaner companies, the sales seminars are ill conceived and a waste of money.

Which of the following, if true, is the most effective challenge to the critics of sales seminars?

(A) Those vacuum cleaner companies whose sales were highest prior to 1987 are the only companies that did not send employees to the seminars.

(B) Vacuum cleaner companies that have sent employees to sales seminars since 1987 experienced a greater drop in sales than they had prior to 1987.

(C) The cost of vacuum cleaner sales seminars run by outside consultants has risen dramatically since 1987.

(D) The poor design of vacuum cleaner sales seminars is not the only reason for their ineffectiveness.（A）

(E) Since 1987, sales of vacuum cleaners have risen twenty percent.

taixiKim

？？？？都没有人理吗？

clipperp

文中所说的是send employees to the seminars的公司和没有这样做的公司间的一个问题。

而E选项说vacuum cleaners这个东西本身的销售，和原文所说参加这个seminar有没有用一点关系也没有，是个完全无关选项。

taixiKim

那A为什么就可以呢？而且用1987年前的，不是也无关吗？

raiden_lee

A的意思是1987年以前的销售很好的VC公司不参加。

找出了参加seminars和不参加seminars的公司的其他原因是因为公司本身销量就很好。

找出了文中的GAP。不是参不参加seminars的问题，是公司本身参加前的状态问题。

此类型题比较典型。

clipperp

楼主你把选项A翻译一下就知道问题了，那是说1987年前的事情吗？

dldennis

A说1987年前销量是highest，说明1987后销量减少，而这些公司都没有参加seminar，所以导致销量减少，削弱结论。

不知对不对？

wildmantomba

1987年以来
参加seminar的公司比不参加seminar的公司收益低
参加seminar的构想拙劣且浪费钱

推理链：参加seminar导致收益差

weaken的条件
不是参加seminar导致公司收益差
而是本来就比较差（那些没有参加seminar的公司在1987年以前的业绩是最好的--他因）

这题跟那些给青少年看有暴力映射的题目一样
不是电影导致青少年有暴力倾向而是青少年本身就有暴力倾向