求教一道GWD21的CR~~谢谢各大牛

倩猫记

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.

645791135

选B啊，

倩猫记

选B啊，

-- by 会员 645791135 (2012/2/9 17:21:19)

我也选的B，给的答案是E~~

FFD2012

选B啊，

-- by 会员 645791135 (2012/2/9 17:21:19)

我也选的B，给的答案是E~~

-- by 会员 倩猫记 (2012/2/9 17:30:24)

选E没错
题目说  最近在换线   但是换了后远距离信号恶化了   因此需要REGENEATOR       L公司是生产大头   因此如果一个新的长距离线路建设的话L会收益  
很明显这里的conclusion的assumption是  建设长线会用L的REGENEATO        
B 是说 扩大规模生产成本上升   但是成本上升不等于会亏
E 是说  有新技术REGENERATOR  可以使信号在需要regenerator之前不恶化的线路比现在长many times ——》   可能不要L的regenerator了 weaken

myla32

ls 不是不要L的regenerator 是说因为有好几个公司在做这个regenerator=> 不一定L就会赚很多

IBiturbo

myla32 发表于 2013-9-24 18:30
ls 不是不要L的regenerator 是说因为有好几个公司在做这个regenerator=> 不一定L就会赚很多 ...

很严谨呀！ ：削弱most benefit 不是一点也不挣。

myla32

IBiturbo 发表于 2013-9-24 19:55
很严谨呀！ ：削弱most benefit 不是一点也不挣。

exactly