GMAT&LSAT CR里几题不明白...

10. Traffic safety experts predict that the installation of newly designed air bags in all cars in the United States would reduce the average number of fatalities per traffic accident by 30 percent. In order to save lives, the Department of Transportation (DOT) is considering requiring automobile manufacturers to install air bags of this design in all cars produced after 1998.
Which of the following, if true, represents the strongest challenge to the DOT’s proposal? 答案是A...完全不理解...
(A) Air bags of the new design are more given to being inadvertently triggered, an occurrence that can sometimes result in fatal traffic accidents.
(B) The DOT is planning to require automobile manufacturers to produce these air bags according to very strict specifications.
(C) After installing air bags in new cars, automobile manufacturers will experience an increase in sales.
(D) The proposed air bag installation program will adversely affect the resale of cars manufactured prior to 1998.
(E) As production costs increase, the profits of many domestic automobile dealers show a marked decrease.

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.这个不是challenge啊..是support啊..晕..
(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.
(E) Since 1987, sales of vacuum cleaners have risen twenty percent.

20. A light bulb company produces 2,000 light bulbs per week. The manager wants to ensure that standards of quality remain constant from week to week. The manager, therefore, claims that out of 2,000 light bulbs produced per week, 500 light bulbs are rejected.
Of the following, the best criticism of the manager’s plan is that the plan assumes that
(A) light bulb manufacturers cannot accept all light bulbs that produced
(B) the overall quality of the light bulbs would not be improved if the total number of light bulbs produced were reduced
(C) each light bulb that is reviewed is worthy of being reviewed
(D) it is difficult to judge the quality of a light bulb
(E) the 1,500 light bulbs that are accepted will be of the same quality from week to week
C的意思不理解啊....每2000里500被剔除的话,这2000要都是好的,这500不就浪费掉的...这2000都烂,剩下的1500不也很烂?

第一题，A是说，气袋不经意就会被激发开，然而造成更多的死亡率，

这就是在说，气袋的不好，攻击了题目，说交通部门要就要安装的建议！

第二题，注意题目是说Critics of sales seminars 从87后才说怪seminar 不好，

那这句话的意思就是说，他们认为87前情况于此相反，》seminar没什么不好，

选项A说87以前似乎不参加seminar的人 ，sales也是最高的，跟87后citics的观点一样，这样就削弱了。 

第三题，选E！i'm quite sure to choose e!

看清楚题目真正问的，MM，！

他问你，你认为反对那个管理者计划的理由是说他提前假设了。。。。？

他提前假设了，accepted 1500个是一样合格的，但是他蛮逻辑没学好啊，不一定每一次生产过程defect rate都是一样的啊，如果只有1499个符合标准，或者如果有1501个符合标准的话，他不是滥竽充数就是浪费了！