Radio
stations with radio data system (RDS) technology broadcast special
program information that only radios with an RDS feature can receive. Between 1994 and 1996, the number of RDS radio stations in Verdland increased from 250 to 600. However,
since the number of RDS-equipped radios in Verdland was about the same
in 1996 as in 1994, the number of Verdlanders receiving the special
program information probably did not increase significantly.
Which of the following is an assumption on which the argument depends? (A)
Few if any of the RDS radio stations that began broadcasting in
Verdland after 1994 broadcast to people with RDS-equipped radios living
in areas not previously reached by RDS stations. (B) In 1996 most Verdlanders who lived within the listening area of an RDS station already had a radio equipped to receive RDS. (C) Equipping a radio station with RDS technology does not decrease the station's listening area. (D)
In 1996 Verdlanders who did not own radios equipped to receive RDS
could not receive any programming from the RDS radio stations that
began broadcasting in Verdland after 1994. (E) The RDS radio stations in Verdland in 1996 did not all offer the same type of programming. 请教A是怎么推出来的。
我的逻辑有问题吗？
本人逻辑：
原题的fact: number of radio stations increase; however, the number of RSD-equipped radion remain stable
原题的conclusion: the number of Verdlanders receiving the special
program remain stable
从fact 到 conclusion 必须的前提是 rsd-radio的数量 代表了 收听 人数， 也就是 没有 rsd-radio的人无法收听 rsd节目。
所以 选D
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发表于 2009-3-11 18:00:00
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