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题库 / Prep2007E2-CR-11
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?
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.
In 1996 most Verdlanders who lived within the listening area of an RDS station already had a radio equipped to receive RDS.
Equipping a radio station with RDS technology does not decrease the station's listening area.
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.
The RDS radio stations in Verdland in 1996 did not all offer the same type of programming.
中等难度的逻辑思维题目。题目信息：Verdland的RDS radio stations 的数量从1994年的250增加到1996年的600，而Verdland的RDS-equipped radios的数量保持不变。因而接收special program information的Verdlander的人数没有增加很多。问结论是基于哪项假设。
station数量增加，说明RDS的覆盖范围增加了，而RDS-equipped radios的数量不变，则有两种可能性，一是receive special information的人数不变，因为所有具有rds radio的人在之前处于覆盖范围内，增加范围对他们无影响；二是receive special information的人数增加，因为之前不再station覆盖范围内的rds radio现在处于station的覆盖范围。由此可知，正确选项是A。
做题思维要严谨，自我劝诫！
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