问道逻辑题（大全I-18题）

wildchiming · 发表于 2010-12-9 22:23:17

大全-Ⅰ-18. Critics of sales seminars run by outsideconsultants point out that since 1987, revenues of vacuum cleaner companieswhose employees attended consultant-led seminars were lower than revenues ofvacuum cleaner companies whose employees did not attend such seminars. Thecritics charge that for vacuum cleaner companies, the sales seminars are illconceived and a waste of money.
Which of the following, if true, isthe most effective challenge to the critics of sales seminars?
(A)Those vacuum cleaner companies whose sales were highest prior to 1987 are theonly companies that did not send employees to the seminars.
(B)Vacuum cleaner companies that have sent employees to sales seminars since 1987experienced a greater drop in sales than they had prior to 1987.
(C) Thecost of vacuum cleaner sales seminars run by outside consultants has risendramatically since 1987.
(D) Thepoor design of vacuum cleaner sales seminars is not the only reason for theirineffectiveness.（A）
(E)Since 1987, sales of vacuum cleaners have risen twenty percent.

我选的B，说收入低不是seminar的原因，而是他因，所以我觉得B对，但是答案选A，我怎么也想不明白，请问一下，为什么是A呢？

eliasfan · 发表于 2010-12-9 23:07:44

A is support not weaken

wildchiming · 发表于 2010-12-10 00:25:14

对啊，我读来读去也想不通怎么是A选项呢，烦请知道的解释一下。

sdcar2010 · 发表于 2010-12-10 00:33:17

A is the weakener. Because this is an unfair comparison if the only company did not send people to the seminar is the best performing company. We need to compare apples to apples, i.e., two companies that are comparable in ALL categorie to start with, in order to have a fair comparision of the effects of the seminar.

For example, maybe if those companies did not send employees to the seminar, their sales would drop even further. Drop less is still a benefit!

问道逻辑题（大全I-18题）

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