10.3换库，不说了太惨了

jasonhiga

ziyuenlau 发表于 2017-10-3 14:18
Source : GMATPrep
Radio Stations with radio data system (RDS) technolodgy broadcast special program ...

麻烦编辑一下答案

Crystalgogogo

ziyuenlau 发表于 2017-10-3 14:18
Source : GMATPrep
Radio Stations with radio data system (RDS) technolodgy broadcast special program ...

请问 是A吗？

98xiaomi

Crystalgogogo 发表于 2017-10-3 14:54
请问 是A吗？

Even though new RDS radio stations have been set up, since the number of radios with RDS feature is same in 1996 as in 1994, the author is concluding that the same number of people are receiving RDS programs.

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.

What if the new RDS radio stations were set in areas which did not receive RDS programs before.. (say, if that particular frequency was not available in remote areas but when new radio stations were set, these areas starting receiving RDS prgrams.) There might be people in these areas who already had RDS equipped radio. These people would have started receiving RDS programs (e.g. Initially FM had limited reach and though many radios had FM capability, they could not receive it. After FM became common, even though people didn't buy new radios, more people started receiving FM)
So for his conclusion to be true, the author is assuming that RDS radio stations that began after 1994 did not broadcast to people who were unreachable previously. Hence answer A.

None of the other choices qualify as an assumption.       
_________________

Crystalgogogo

98xiaomi 发表于 2017-10-3 15:00
Even though new RDS radio stations have been set up, since the number of radios with RDS feature i ...

hhhh thx！~在2012年的帖子里刚见过你

Olivia730730

A选项句子没看懂，可以给分解一下么谢谢= =

wowwow08

lz那道Q我帮你大概画了一下图，蓝色大正方形的边长是2n/3，所以周长就是8n/3了

Crystalgogogo

Olivia730730 发表于 2017-10-3 15:05
A选项句子没看懂，可以给分解一下么谢谢= =

结构是“如果有。。。这种情况的话也是极少的。”
中间的点点点就是“人们equip了以后这些station才开始broadcasting”

geleyun

感谢楼主！～祝楼主心想事成
顺便帮解释一下逻辑：题干说特别节目只有装了RDS才能收听，1994年1996年间RDS站台增设了，但是装RDS设备的数量并没有增多，结论是收听特别节目的人没有增多，A选项说1994年很少有人住在接受不到RDS站台信号的地方，取非：如果很多人住在之前没法接受信号，也就是这些人1994年就已经有radio了，但是没法收听节目，现在可以收听到节目而（不需要买radio），所以就会出现前提中的RDS设备数量没增加，但是呢节目听众就会增长，结论就没法得出了，所以选A