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GRE 2013 p.131 有道Critical Reading的题,有谁能够帮我解释一下,真的不懂啊
题目是这样的
According to the Federal Postal Service bureau of information, the rate of complaints concerning late delivery was 30 times higher in 1991 than in 1964. Because the Federal Postal Service changed neighborhood routes from a multiple-truck delivery system to a single-truck delivery system between 1964 and 1991, the enormous increase in complaints must be a result of this systematic change.
Which of the following, if true, weakens the conclusion drawn above?
A. In 1991, most late-mail complaints were reported to the appropriate Federal Postal Service office, whereas in 1964 most were not.
B. Even in the multiple-truck delivery system, certain letters will arrive late.
C. According to the Federal Postal Service bureau of information, most of the complaints concerning late delivery in 1991 were about registered mail.
The bulk amount of mail processed by the Federal Postal Service was not much larger in 1991 than it was in 1964, before the systematic change occurred.
我的翻译:
根据国家邮政服务局的信息,关于晚点寄送的投诉信在1991年比1964年高出3倍。 因为国家邮政服务局在1964年到1991年间在把区域的邮递路线由多车邮递更变为单车邮递,所以巨大的投诉信的增加是由这个系统变化引起的。
我的想法:
它问的是哪一选项最弱化结论。
结论:巨大的投诉信的增加是由这个系统变化引起的
前提:1) 根据国家邮政服务局的信息,关于晚点寄送的投诉信在1991年比1964年高出3倍。2)国家邮政服务局在1964年到1991年间在把区域的邮递路线由多车邮递更变为单车邮递
推断:单车使得效率变低, 所以投诉信就增加了。
若问的是弱化,那么就是说这个投诉信的增加的原因可能不是这个系统的变化?
童鞋们,你们认为答案是什么,然后为什么呢?
答案请参看GRE OFFICAL GUIDE p.382, 看懂的求解释啊! [size=10.000000pt]
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