急急急求解答！！！！

王梦醒 · 发表于 2011-8-23 17:21:45

In the nation of Partoria, large trucks currently have a much higher rate of traffic accidents per mile driven than other vehicles do. However, the very largest trucks—those with three trailers载货挂车—had less than a third of the accident rate of single- and double-trailer trucks. Clearly, therefore, one way for Partoria to reduce the number of traffic accidents would be to require shippers to increase their use of triple-trailer trucks.
Which of the following, if true, most seriously weakens the argument?
A. Partorian trucking companies currently use triple-trailer trucks only for long trips using major highways, which is the safest kind of trip for large trucks.
B. No matter what changes Partoria makes in the regulation of trucking, it will have to keep some smaller roads off-limits to all large trucks.
C. Increased use of triple-trailer trucks would mean that large trucks would account for a smaller proportion of all miles driven on Partoria’s roads than they currently do.
D. In Partoria, the safety record of the trucking industry as a whole has improved slightly over the past ten years.
E. The volume of truck traffic on Partoria’s highways could be reduced by encouraging shippers to use rail transport whenever possible.

为啥选A不选C？？？？？？谁能告诉我啊！！小女跪求答案！！

王梦醒 · 发表于 2011-8-23 22:00:51

自己顶自己顶

王梦醒 · 发表于 2011-8-23 22:01:07

再顶再顶

王梦醒 · 发表于 2011-8-23 22:01:48

帮忙看看啊各位看客！有想法的捧个人场！

radium83 · 发表于 2011-8-24 20:44:11

因为triple-trailer trucks只走highways，所以是路安全而不是车更安全

ssxxtt27 · 发表于 2011-8-24 23:50:37

A提出了另外一条原因来解释triple-trailer trucks为什么事故率低，表明triple-trailer trucks事故率低并不是由其自身安全性能导致的，而是由路况安全造成的。所以，引用单纯引进triple-trailer trucks不能达到降低事故率的目的，削弱。

hanshipeng · 发表于 2011-8-25 13:54:11

题说：托的越多，事故越少。weaken就是说明拖车多少和事故没关系。所以A.
C貌似对，但是说的确实拖车越多--》迈数越少--》事故越少。还是说的拖车多少和事故的关系。

王梦醒 · 发表于 2011-8-26 22:01:41

我懂啦！

王梦醒 · 发表于 2011-8-26 22:02:22

懂啦多谢！

王梦醒 · 发表于 2011-8-26 22:03:06

多谢多谢祝好运！

急急急求解答！！！！

O(∩_∩)O谢谢！

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