最新E-11，18，谢

wikeypig

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.
(E) Since 1987, sales of vacuum cleaners have risen twenty percent.
Answer: A 不是问most effective challenge to the critics of sales seminars?
是反驳after this and therefore because of this 错误而challenge to the critics吗？
11.    A private bus company gained greater profits and provided bus service to the area at lower fares by running buses more frequently and stimulating greater ridership. Hoping to continue these financial trends, the company plans to replace all older buses with new, larger buses, including some double-decker buses,.
The plan of the bus company as described above assumes all of the following EXCEPT
(A) the demand for bus service in the company’s area of service will increase in the future
(B) increased efficiency and revenues will compensate for any new expenses the company incurs
(C) the new buses will be sufficiently reliable to ensure the company a net financial gain once they are in place
(D) driving the new buses will be no more difficult than driving the buses they are to replace
(E) the larger, double-decker buses will not face obstacles such as height and weight restrictions in the bus company’s area of service
答案：D，我选C。请辨析

cranberry

1,文章的结论是这个论坛是罪魁祸首，而依据是参加论坛的公司的销售数据不如不参加论坛的，A推翻的论据和结论之间的关系，指出只有原来销售不好的公司才参加了论坛，而并不是因为参加论坛才下降的。

2，文章讨论的是可行性，既然是假设，对答案取非即可知D不影响结论的成立。因为新车是不是难以驾驶并不影响公司的收益，即使难，公司的成本和收入都不应受影响。