请教GWD 31-16

Cantaloupe

以下是引用追逐梦想2006在2006-3-20 21:50:00的发言：

分析了很长时间，还是认为B是正确的答案

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 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? 注意问是否能most benefit? 如果fiber-optic 网络constructed

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. 【简而言之，就是说成本随着产品扩大，成比例提升，说明不一定benefit】

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.   【volume不是判断是否盈利的标准】

D: There are technologies that enable telecommunications signals to be transmitted without either wire or fiber-optic cable.【是否有其他技术不一定能削弱，还需要考虑其成本等因素】

E: Several manufacturers are developing regenerator technologies that will allow signals to be transmitted many times farther than at present before requiring regeneration. 【文中并没有说明signal能被transmitted farther就代表了其优势。文中只说这个signal 被传递farther就可行】

个人认为B是比较合理的削弱答案。

差点被骗了，BENEFIT 不是 PROFIT 啊，受益就行。正确答案E.

josephhe

支持B,

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 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.

题目说，如果建设fiber optic networks的话，Light-line最大获利。

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

如果扩大生产的话，Light-Line需要对labor和material付出相对比例更高的开销。由于是成本增长相对比例更高，所以不一定获利。weaken结论。

D: There are technologies that enable telecommunications signals to be transmitted without either wire or fiber-optic cable.

只能说明新技术不需要fiber也不需要wire，所以在如果建设fiber-optic network的前提下，不一定weaken结论。

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

假设Light-line不在这些manufacturers之内，那么即使竞争对手的技术好，也不一定会让Light-line不会获得最大利益。没有其他前提的条件下，不能说Light-line不会在竞争中取得最大利益。

个人拙见。

sabrina07

E

[此贴子已经被作者于2007-1-19 16:48:38编辑过]

abort

e吧
B中spend proportionately more on labor and materials.的意思是使得人工和材料费成比例地增加吧，proportionately是形容more的

LOUI1121

文中根本没有提到EXPANSION. 大家不要自己设想. B)为无关.

小蓓

选E，差点没注意到E项说得是Several manufacturers are developing regenerator technologies ，而非regenerator，所以对regenerator 的生产商Light-Line构成威胁

[此贴子已经被作者于2007-2-17 11:08:41编辑过]

benja

觉得B这个选项，说Expanding its production会花费labor and materials.，但是没说能不能带来更多的利益呀，如果有的话，可能会抵消这些花费也不一定。

还有就是E 说 Several manufacturers are developing regenerator technologies，也没说能不能研制成功。

D无关项，

应该选什么？？？

mimixiaxia

up

Whitney

(E)
The argument belongs to past versus future type.  For this type question, the assumptiuon always is "All other factors are unchaged".  (E) suggest that the number of regenerators required for new network will decrease, ->all manufactures of regenerators including Light-line will be affected.   

zijing4546

本题的前提是
            if new long-distance fiber-optic telecommunications networks are constructed.
D选项说其他技术的应用会导致fiber optic不再被使用，
推翻前提，不能算削弱，D选项就是推翻前提。

附带个例子：我有翅膀，所以我会飞。
推翻前提： 我没有翅膀
削弱：我虽然有翅膀，但是我却没有鸟类所特有的适合飞行的骨骼结构。

削弱比须是在肯定前提的基础上的