标题: 求助一道GWD的逻辑。。~~~~谢谢大家~ [打印本页] 作者: livdl 时间: 2012-2-11 13:06 标题: 求助一道GWD的逻辑。。~~~~谢谢大家~ 16. GWD31-16 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 so the signals must be run through a piece of equipment called a regenerator before being transmitted farther. 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-line’s prospects?
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 transmitted without either wire or fiber-optic cable. E. Several manufacturers are developing regenerator technologies that will allow signals to be transmitted many times farther than at present before requiring regeneration.
++++++++++++++++++++++++ 答案是E 但是我选的是B 关键E说的是速度比安装那个东西之前快很多倍而不是比这个公司生产的这个东西快很多倍啊。。。。。 郁闷。。。作者: Quintus 时间: 2012-2-11 13:12
我觉得B不能削弱，成本高了，万一转的更多，一样会赚钱啊。