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GMAT逻辑削弱题在线练习五

2018-05-10 17:08:00来源：网络

　　新东方在线GMAT频道为大家带来GMAT逻辑削弱题在线练习，希望对大家GMAT备考有所帮助。更多精彩尽请关注新东方在线GMAT频道!

点击查看》》》【GMAT逻辑题型讲义汇总】

　　21.(Z21)In recent years, networks of fiber-optic cable have been replacing electrical wire for transmitting telecommunications signals, Signals running through fiber-optic cables deteriorate, and wo the signals must be run through a piece of e3quiplent called a regenerator before being transmitted father. Light-Line is the leading manufacturer of signal regenerators. Therefore, Light-line is one of the companies that will most benefit if new long-distance fiber-optic telecommunications networks are constructed.

　　Which of the following, if true, casts the most doubt on the prediction about light-ling’sprospects?

　　A. Telecommunications signals sent along electrical wires can travel much Farther than signals transmitted through fiber-optic before needing to be

　　Regenerated.

　　B. Expanding its production of regenerators will require Light-line to spend proportionately more on labor and materials.

　　C. The volume of signals that a fiber-optic cable can carry is several Thousand times greater than the volume that can be carried by an electrical Wire of similar size.

　　D. There are technologies that enable telecommunications signals to be transmil

　　Without either wire or fiber-optic cable

　　F. Several manufacturers are developing regenerator technologies that will allow to be transmitted many times farther than at present before requiring regeneration.

　　22.(Z21)Rail Executive: Five years age we discontinued train service between Lamberton and its suburbs because low ridership caused total fares collected to be substantially lower than the cost of operating the service it is true that recent population growth in the suburban communities suggests increased potential ridership, neverthelesssince most of the newer residents own automobiles, restoring the train service this year would still result in serious deficits

　　Which of the following ,if true casts the most serious doubt on the rail executive’s argument?

　　A. Once train service along a given route has been discontinued ,there are substantial start-up costs associated with restoring service along that route

　　B. Most of the new residents of Lamberton’s suburbs do not need to

　　travel into Lamberton regularly for shopping or recreation

　　C. If train service were restored this with increased hours of service there would not be an increase mcrease in total ridership

　　D. A survey conducted last year showed that few people living in Lamberton or its suburbs support increased public funding for mass transportation.

　　E. Recently there have been sharp increases in parking fees in Lamberton and in highway tolls on major commuter routes.

　　23.(Z21)A shortage of orders for Manto Aircraft’s airliners has led analysts to predict that the manufacturer will have to lay workers ,the new order that consolidated airlines has just made for 20 of Manto’s model TX jets does not provide a reason for the analysts to revise their predictions ,because simultaneously with its new order , consolidated canceled its existing order for an equal number of manto’s larger, more expensive model Z uets

　　which of the following ,if true, most seriously weakens the argument?

　　A. Manto relies more heavily on outside subcontractors to provide the labor to

　　manufacture the Model Z than it does the Model TX

　　B. The Manto employees who currently work to manufacture the model Z are

　　Not proficient at manufacturing the model TX

　　C. Manto includes all required maintenance work for the first five years in the

　　price of each jet it sells .

　　D. Manto has had to lay off workers several times within the past ten years but

　　has typically rehired many of the workers when it subsequently received new orders

　　E. A large number of the airliners in consolidated is fleet are at the beginning of

　　their expected service life

　　24.(Z22)Travel agents are market intermediaries who make their living by gathering, organizing,and dispensing information about travel-related services

that is not readily available to most consumers through new information technologies,such as the internet much of this information can now be made directly available to consumers demand for the services of travel agents will be drastically reduced

　　Which of the following, if true, most seriously weakens the argument?

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