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这题没有头绪.
B怎么削弱了? 这不是诉诸权威吗?
题目结论是:这种降价策略是不行的.一旦再想采取高价,就会使竞争着有更多的机会来使得公司降价.
感觉B没有什么关系,虽说新竞争者出现时,公司很有可能再降价,但感觉没有针对结论啊.
谁来讲讲?
B确实有诉诸权威的问题，但也是可以削弱的。如果航空公司可以一次一次的把竞争对手挤走，就不会给竞争对手机会了。
D是加强。因为它说机票在经济承受范围外，加强了如果再来对手，原公司会挺不住。
为方便后人~ 我做点小贡献~ 把题目重新贴一下~ 嘻嘻~！
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.
(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.
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