GWD-28-17!看不懂了

天之角 · 发表于 2005-9-21 14:49:00

28-17: In the nation of Partoria, large trucks currently account for 6 percent of miles driven on Partoria’s roads but are involved in 12 percent of all highway fatalities. The very largest trucks – those with three trailers – had less than a third of the accident rate of single- and double-trailer trucks. Clearly, therefore, one way for Partoria to reduce highway deaths 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 have so far used triple-trailer trucks on lightly traveled sections of major highways only.

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: Very few fatal collisions involving trucks in Partoria are collisions between two trucks.

D: In Partoria, the safety record of the trucking industry as a whole has improved slightly over the past ten years.

E: In Partoria, the maximum legal payload of a triple-trailer truck is less than three times the maximum legal payload of the largest of the single-trailer trucks

我选了C，也觉得不太好，有一个汇总答案选了A，大家都选什么讨论一下。

shiningshining · 发表于 2005-9-21 15:08:00

A

A选项时说triple-trailer truck一般在lightly traveled sections行驶，所以事故率低。

而不是因为它的安全性能高，

也就是说如果增加triple-trailer truck，让其在正常路段形式的话，不一定能降低事故率。

[此贴子已经被作者于2005-9-21 15:10:15编辑过]

howardwang · 发表于 2005-9-21 16:06:00

以下是引用shiningshining在2005-9-21 15:08:00的发言：

A

A选项时说triple-trailer truck一般在lightly traveled sections行驶，所以事故率低。

而不是因为它的安全性能高，

也就是说如果增加triple-trailer truck，让其在正常路段形式的话，不一定能降低事故率。

支持A.

简单的说，就是可能是其他原因造成了triple-trailer trucks更安全。所以，削弱结论。

天之角 · 发表于 2005-9-21 16:08:00

可是文章既没有说triple-trailer trucks 安全性高，也没有说以后就让triple-trailer trucks 在正常路段行驶啊。我觉得A倒有点加强的意思。要两个assumptions才能推出A，我觉得有点牵强。

[此贴子已经被作者于2005-9-21 16:08:57编辑过]

howardwang · 发表于 2005-9-21 16:40:00

以下是引用天之角在2005-9-21 16:08:00的发言：
可是文章既没有说triple-trailer trucks 安全性高，也没有说以后就让triple-trailer trucks 在正常路段行驶啊。我觉得A倒有点加强的意思。要两个assumptions才能推出A，我觉得有点牵强。

The very largest trucks – those with three trailers – had less than a third of the accident rate of single- and double-trailer trucks.

天之角 · 发表于 2005-9-21 16:44:00

好像明白点了，不过还是觉得A更像加强。

uibewsj · 发表于 2006-11-23 12:54:00

题干：某车事故少，所以安全，大家都用吧~
削弱：该车用得少，而且都是在比较安全的路段 (当然事故少) - 他因

娜娜仁 · 发表于 2006-12-1 21:51:00

ding

davidli8888 · 发表于 2006-12-2 17:34:00

My vote is A, after hard thinking. The premise is bigger truck is safer, compared with the smaller one. The assumption is that they both are comparable, ie they run on the same conditions. Choice A, if true, shows that bigger truck runs on a favorable condition quite different from the smaller one, a condition accounting for the difference in the fatalities.

Again it demonstrates how important it is to catch hold on the hidden assumption to crack on tough CR questions.

[此贴子已经被作者于2006-12-3 9:04:54编辑过]

gonghao · 发表于 2006-12-2 22:27:00

vote for A

GWD-28-17!看不懂了

GWD-28-17!看不懂了

所属分类: GMAT考试

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