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
请问这题的答案是否为E.有哪位热心人可以参谋一下. 谢谢!
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.
楼主见黄色部份, 是不是打错了?
E好象不对, 我选A.
为什么选a呢？
The hidden assumption: under the similar situation, three trailers have less incidence rates than do other trucks. If the difference in incidence rates occurs because of the other factors, as stated in A, then the conclusion does not necessary hold.
The hidden assumption: under the similar situation, three trailers have less incidence rates than do other trucks. If the difference in incidence rates occurs because of the other factors, as stated in A, then the conclusion does not necessarily hold.
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
请问这题的答案是否为E.有哪位热心人可以参谋一下. 谢谢!
那A是在说什麽呀? on lightly? 是说很少使用triple trail truck 嘛?
有weaken吗?不懂~~
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?
明显是A，前面说三拖的比一拖和二拖的车祸少三分之一，所以建议多用三拖的。
而A说卡车公司到目前为止在主要的高速公路上少用三拖，三拖只是lightly traveled sections 。简单说，意思是，为什么三拖的车祸数据低啊？因为它很少开高速。如果开高速，说不定更多车祸，所以削弱了建议。
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
请问这题的答案是否为E.有哪位热心人可以参谋一下. 谢谢!
楼主这么说是认为文中所说的：
The very largest trucks—those with three trailers—had less than a third of the accident rate of single-and double-trailer trucks.
是根据Partoria本身的统计数据。但文中并没有说明这一点。如果选A等于又引入一个新的assumption。
这道题目E应该是无关选项，但A也有不严密的地方。
楼主这么说是认为文中所说的：
The very largest trucks—those with three trailers—had less than a third of the accident rate of single-and double-trailer trucks.
是根据Partoria本身的统计数据。但文中并没有说明这一点。如果选A等于又引入一个新的assumption。
这道题目E应该是无关选项，但A也有不严密的地方。
I think A is a perfect "other reasons" type of answer, without any demerits.
It means the lower accident rate of three-tailer trucks is not because of its own merits, but becuase of its cautiousness -- It only travels in those sections of highway where traffic is less than usual. If it travels in normal sections of the highway, it probably will be as dangerous as the other two type, or even more dangerous.
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