真的不可以驳斥premise吗？那OG CR111怎么解释，C选项不是否认了飞机是free wheel system吗？困惑... 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. Which of the following, if true, most severely weakens the argument presented above? (A) Cars, buses, and planes require the efforts of drivers and pilots to guide them, whereas the train will be guided mechanically. (B) Cars and buses are not nearly as fast as the high-speed train will be. (C) lanes 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. (D) The high-speed train line cannot use currently underutilized train stations in large cities. (E) For long trips, most people prefer to fly rather than to take ground-level transportation.
(C) Even with tax incentives, some people will choose not to increase their levels of retirement savings.==>原文的premise是说tax incentive能够帮助savings增加，这个选项反驳这个premise是不可以的。凡是GMAT给出的premise都不能被驳斥，因为是这个argument存在的基础
虽然这个问题已经胡萝卜了，但还是想说下我自己的见解呵，给后面的同学更多的参考 ======================================================= GMAT中没有说过premise不能被反驳哦亲 这道题中 银行缺钱只是一个引子。 condition：通过税收刺激人们往养老账户里面存钱 conclusion：more money becomes available to borrowers
(A) When levels of personal retirement savings increase, consumer borrowing always increases correspondingly.====养老账户的存款增加不一定能导致“more money becomes available to borrowers”
(B) The increased tax revenue the government would receive as a result of business expansion would not offset the loss in revenue from personal income taxes during the first year of the plan.====文章中未提到revenue，无关选项。另外“during the first year of the plan”的出现也提醒这个选项错误，一个政策的好坏不能以第一年的效果来判断。
(C) Even with tax incentives, some people will choose not to increase their levels of retirement savings.====some people 是关键，一部分人不愿意增加养老金存款，但是other people will do，故政策依然有效，不能weaken
(D) Bankers generally will not continue to lend money to businesses whose prospective earnings are insufficient to meet their loan repayment schedules.====结论是有“more money becomes available to borrowers” 并不涉及银行家愿不愿意贷款给business。
(E) The modified tax structure would give all taxpayers, regardless of their incomes, the same tax savings for a given increase in their retirement savings.====很显然的无关选项
关于A&C，比较两者谁的影响更大，影响最大的，则是题目所说“raises the most serious doubt” 先来看C，some people choose not increase their levels of retirement savings，虽然有些人不愿意存钱，但总有人会存，那么存钱的数量肯定是会增加的（只不过没有预想的那么多而已） 再来看A，consumer's level of saving and borrowing will increase correspondingly，存钱数量在增加的同时也在减少，但是并没有说增加和减少的数量，那么完全有可能增加和减少的数量一样多或者是减少的数量大于增加的数量，存钱的数量可能不会变，甚至可能减少，所以A的影响比C更大，所以选A
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发表于 2011-9-23 15:59:45
lanes are not a free-wheel system because they can fly only between airports, which are less convenient
