GMAT逻辑题练习及答案(465)

2017-12-08 11:29

来源：新东方在线

作者：

　　The average cable television company offersits customers 50 channels, but new fiber-optic lines will enable telephonecompanies to provide 100 to 150 television channels to their customers for thesame price as cable companies charge for 50. Therefore, the new companies willdisplace cable companies within a few years.

　　Which of the following, if true, most helpsto strengthen the argument?

　　A. Theinitial cost per household of installing new fiber-optic television servicewill exceed the current cost of installing cable television service.

　　B. Themost popular movies and programs on channels carried by cable companies willalso be offered on channels carried by the fiber-optic lines owned by thetelephone companies.

　　C. Cabletelevision companies will respond to competition from the telephone companiesby increasing the number of channels they offer.

　　D. Sometelephone companies own cable companies in areas other than those in which theyprovide telephone services.

　　E. Thenew fiber-optic services offered by telephone companies will be subject to morestringent governmental programming regulations than those to which cablecompanies are now subject.

　　答案

　　The correct answer is B.

　　See: Strengthen question

　　Think: I need the choice that confirms thecentral assumption. In other words, Strengthen the argument = Strengthen theassumption.

　　Do:

　　Conclusion: The “what” of an argument

　　Inthis case:

　　Cable companies will be displaced by the newcompanies within a few years.

　　.

　　Evidence: The “Why” of an argument

　　In this case:

　　The average cable television company offersits customers 50 channels, but new fiber-optic lines will enable telephonecompanies to provide 100 to 150 television channels to their customers for thesame price as cable companies charge for 50.

　　Assumption: Facts or ideas, notstated in the passage. The assumption must be true if the argument is to beconsidered valid. The assumption typicaldirectly links the evidence with the conclusion. The best way to tackle it isto negate it.

　　In this case:

　　The channels, if not all, the most of themmust be overlapped from both providers.

　　The choice B, only B, confirms the centralassumption. So it’s the correct answer.

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