扫描二维码，直接登录
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.
A 因为：对于1994年之前RDS电台信号就不能发送到的地区，1994年之后才开始进行广播的RDS电台，如果他们中任何一家电台依然不能将广播信号发送到这些地区，那么这些地区里原先就拥有RDS接收器的听众还是无法接收到RDS信息。
所以：即使RDS电台数量增加了，在RDS接收器不变的情况下，能到这些信息的听众数量就不会显著增加。
登录 或 注册 后可以参加讨论