[CR. ] GWD31-16
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?
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.
GWD的答案給E
我當初選了BDE看半天 挑了個D...瞎惹我= =
我想寫一下我後來檢討的邏輯線, 請板上高手幫我看看^^"
fact 1: fiber-optic傳輸siganls需要regenerator
fact 2: LL是regenerator的主要供應商
argument: if 建造了長距離的fiber-optic通訊 → LL會成為獲利最多的其中一家廠商
攻擊點: LL不會成為獲利最多的廠商之一
B: LL 的cost大增。
我: cost增加不表示獲利減少
D: 有新的科技可以使signal不透過fiber-optic傳輸。
我: out of scope.
E: 許多廠商著手開發regenerator，使它傳輸更有效率。
我: LL可能被比下去,就不會是獲利最多的其中之一了
其實B和E我想了很久
因為感覺都可以削弱的說....
有其他的解釋嗎?QQ
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嗯嗯 所以E對的原因是因為
它有明確指出可能生產出"transmit farther的regenerator"嗎?
(而傳輸較遠也的確是個沒什麼爭議的好處)
B只說了cost增加 而沒有隱含任何可能的結果~
是嗎?
※ 編輯: student7 來自: 122.116.100.19 (06/20 00:37)
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