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标题: GWD-31-Q16 求大牛牛们解答，以前的帖子都没看见详细解答，谢谢啦！~ [打印本页]

作者: hoho719 时间: 2011-1-19 00:54
标题: GWD-31-Q16 求大牛牛们解答，以前的帖子都没看见详细解答，谢谢啦！~
1.???GWD-31-Q16
In recent years, networks of fiber-optic cable have been replacing electrical wire for transmitting telecommunications signals. Signals running through fiber-optic cablesdeteriorate, and so the signals must be run through a piece of equipment 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’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 题干是看懂了，就是E选项中的regenerator 和 regerneration的关系，意思搞不明白。。。希望大家帮忙啦@~

作者: sdcar2010 时间: 2011-1-19 01:05
Regenerator is the machine required for signal regeneration.

If other manufacturers can make a new machine which transmits the signals farther than the machine Light-line made, then the new machine would be in high demand rather than the one made by Light-line.

作者: hoho719 时间: 2011-1-19 12:24
可是题干只是说L-L是one of the most呢…还有什么叫before requiring regeneration还是不太理解呢-_-#

作者: sdcar2010 时间: 2011-1-19 12:39
the signals MUST be run through a piece of equipment called a regenerator BEFORE being transmitted father

作者: hoho719 时间: 2011-1-19 22:41
谢谢NN~以后有问题还请多多帮助~！

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