标题: 【各位大牛们，求教两道PREP里的逻辑题~拜谢大家了！】 [打印本页] 作者: 1155665 时间: 2011-7-26 21:38 标题: 【各位大牛们，求教两道PREP里的逻辑题~拜谢大家了！】 1、Some airlines allegedly reduce fares on certain routes to a level at which they lose money, in order to drive competitors off those routes. However, this method of eliminating competition cannot be profitable in the long run. Once an airline successfully implements this method, any attempt to recoup the earlier losses by charging high fares on that route for an extended period would only provide competitors with a better opportunity to undercut the airline's fares.
Which of the following, if true, most seriously weakens the argument?
(A) In some countries it is not illegal for a company to drive away competitors by selling a product below cost. (B) Airline executives generally believe that a company that once underpriced its fares to drive away competitors is very likely to do so again if new competitors emerge. (C) As part of promotions designed to attract new customers, airlines sometimes reduce their ticket prices to below an economically sustainable level. (D) On deciding to stop serving particular routes, most airlines shift resources to other routes rather than reduce the size of their operations. (E) When airlines dramatically reduce their fares on a particular route, the total number of air passengers on that route increases greatly.
正确答案：B 我的想法：做weaken题应该是选项削弱原文结论吧？我觉得原文结论是this method of eliminating competitors can not be profitable in the long run那句吧。。。那B选项怎么就跟影响长远有益联系起来了呢？？？
2、Denoma, a major consumer-electronics maker, had a sizable decline in sales revenue for its most recent fiscal year. This result appears surprising, because electronics retailers report that although their overall sales were considerably lower than in the previous year, their sales revenue from Denoma models actually grew, largely thanks to some innovative and popular models that Denoma introduced. Which of the following, if true, does most to explain the apparently surprising result? A. Because of the need to educate the public about its new models’ capabilities, Denoma’s advertising spending was higher than normal over the period. B. For the period at issue, Denoma’s major competitors reported declines in revenue that were, in percentage terms, greater than Denoma’s. C. A significant proportion of Denoma’s revenue comes from making components for other consumer-electronics manufacturers. D. Unlike some of its major competitors, Denoma has no lines of business outside consumer electronics to provide revenue when retail sales of consumer electronics are weak. E. During the period, consumer-electronics retailers sold remaining units of Denoma’s superseded models at prices that were deeply discounted from those models’ original prices.