111. The difficulty with the proposed high-speed train line is that a used plane can be bought for one-third the price of the train line, and the plane, which is just as fast, can fly anywhere. The train would be a fixed linear system, and we live in a world that is spreading out in all directions and in which consumers choose the free-wheel systems (cars, buses, aircraft), which do not have fixed routes. Thus a sufficient market for the train will not exist.
Situation A free-wheel system of transportation, the airplane, is as fast as a fixed linear system, the high-speed train. Because people prefer free-wheel systems that do not have fixed routes, the high-speed train will never find a sufficient market.
Which of the following, if true, most severely weakens the argument presented above?
(C) Planes are not a free-wheel system because they can fly only between airports, which are less convenient for consumers than the high-speed train’s stations would be.
（正确答案）
(B) Cars and buses are not nearly as fast as the high-speed train will be.
The passage compares the speed and system models of airplanes and high-speed trains. The argument does not incorporate buses and cars, which are included only to give examples of freewheel systems, and so this statement is irrelevant.
这一题，我的疑问是关于CR题目中小例子的重要性，就是题目中给出的可有可无的小例子能否被列为核心元素（如此题中的cars & buswa) B错很明显，因为这个选项偷龙转凤，把比较方式转换了。然而，假设我们不知道cara & buses和高铁哪个快，并把car & bus加入到速度的比较中。即把下划线的部分改为and the plane, cars and buses, which are just as fast, can go anywhere.
那么这样的话B是不是就可以当成正确选项呢？ 我这样问是因为我总觉得OG的意思是说这样的小例子不重要：‘which are included only to give examples’......
我想听听大家的意见 | 
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发表于 2011-11-5 22:38:14
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