考古来也…… 谢谢LZ！！麻烦确认一下
V1 某个种族靠打鱼为生，所以应该只住在渔产丰富的河的沿岸，可是发现有些人也住在现在渔产不怎么丰富的河边，说明鱼的分布后来变了。问weaken。有个选项是他们也打猎。
GWD原题变体？
GWD-28-Q17
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
answer: A
3. Opponents of allowing triple-trailer trucks to use the national highway system are wrong in claiming that these trucks are more dangerous than other commercial vehicles. In the western part of the country, in areas where triple-trailers are now permitted on some highways, for these vehicles the rate of road accident fatalities per mile of travel is lower than the national rate for other types of commercial vehicles. Clearly, triple-trailers are safer than other commercial vehicles.
Which one of the following, if true, most substantially weakens the argument? （B）
(A) It takes two smaller semitrailers to haul as much weight as a single triple-trailer can.
(B) Highways in the sparsely populated West are much less heavily traveled and consequently are far safer than highways in the national system as a whole.
(C) Opponents of the triple-trailers also once opposed the shorter twin-trailers, which are now common on the nation’s highways.
(D) In areas where the triple-trailers are permitted, drivers need a special license to operate them.
(E) For triple-trailers the rate of road accident fatalities per mile of travel was higher last year than in the two previous years.
-- by 会员 grogr (2010/11/25 20:35:45)
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发表于 2010-11-25 20:32:08
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