请教GWD-31-Q16。搜索未见讨论。

bipedalism

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 cables deteriorate, 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。这道题蛮绕的。我想了半天，最后选了A，请NN指教。

虽然我觉得A也不对，但是，比较来比较去，觉得如果electrical wires能比fiber-optic长距离的传信号，那么会减少regenerator的使用。但是，觉得又和题目第一句相悖了。

E也奇怪，很多厂商开始发展高级regenerator技术，不代表Light-Line就会失去竞争优势呀。LL也能发展高级技术啊。

晕中，请NN指教。

crazecat123

> 很多厂商开始发展高级regenerator技术，不代表Light-Line就会失去竞争优势呀。LL也能发展高级技术啊。
That's besides the point. Light-Line only benefits from long-distance fiber-optic network, but if the newer technology allows signals to travel farther with less number of regenerators, then Light-Line won't be the beneficiary. 

Raymond_GMAT

怎么感觉GWD的题目都需要用常识解题的？

amberdeng

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