问一道逻辑题RDS radio的

lainemai

Radio stations with radio data system (RDS) technology broadcastspecial

program information that onlyradios with an RDS feature can receive. Between

1994 and 1996, the number ofRDS radio stations in Verdland increased from 250

to 600. However, since thenumber of RDS-equipped radios in Verdland was about

the same in 1996 as in 1994,the number of Verdlanders receiving the special

program information probablydid not increase significantly.

Which of the following is anassumption on which the argument depends?

A Few if any of the RDS radio stations that began broadcastingin Verdland after

1994 broadcast to people with RDS-equipped radios livingin areas not previously

reached by RDS stations.

B In 1996 most Verdlanders who lived within thelistening area of an RDS station

already had a radio equipped to receive RDS.

C Equipping a radio station with RDS technology does notdecrease the station's

listening area.

D In 1996 Verdlanders who did not own radios equipped toreceive RDS could not

receive any programming from the RDS radio stations thatbegan broadcasting in

Verdland after 1994.

E The RDS radio stations in Verdland in 1996 did not alloffer the same type of

programming.

这道题我觉得D也是有道理的，如果将D取反就是1996年没有装有RDS设备收音机的Vders可以接收到来自RDSstation的信号，这样不就是正确的了吗，Vders的人数增多了，正好削弱了原文的结论啊？求大牛解释~谢谢~

ukyo2003

D只是把原文陈述了一次，没有削弱效果。D是说1996年没有radio设备的人也没法接受自从1994年开始的RDS广播节目。
答案是A，A是说自从1994年以来，很少有RDS的广播站向以前有设备但是收不到信号的人发节目，意思就是说增加的400个广播站cover的还是以前客户的区域，并没有客户以前有设备，但是因为信号不强(或者没有信号)而收不到节目。想想联通的广播站就知道了，如果以前有联通卡的人，但是因为身边没有广播站收不到信号，那么联通在这个地方多建几个站，有卡又能收到信号的人就增加了，如果联通新建了机站，但是都在以前就能cover的地方，那么cover不到的还是cover不到，客户不会增长。

VideoHead

我觉得其实D的问题在于扩大了论述的范围，所以不直接和题目相关了，能不能听RDS和能不能听到RDS的特别节目信息，是两个概念，题目问的是听特别节目的数量。A是说几乎没有增加RDS广播覆盖的范围。