推荐道逻辑题，大家看看

sophia王晗

Finding of a survey of Systems magazine subscribers:  Thirty percent of all merchandise orders placed by subscribers in response to advertisements in the magazine last year were placed by subscribers under age thirty-five.

Finding of a survey of advertisers in Systems magazine:  Most of the merchandise orders placed in response to advertisements in Systems last year were placed by people under age thirty-five.

For both of the findings to be accurate, which of the following must be true?
-- PREP07 CR1 NO.12
(A) More subscribers to Systems who have never ordered merchandise in response to advertisements in the magazine are age thirty-five or over than are under age thirty-five.
(B) Among subscribers to Systems, the proportion who are under age thirty-five was considerably lower last year than it is now.
(C) Most merchandise orders placed in response to advertisements in Systems last year were placed by Systems subscribers over age thirty-five.
(D) Last year, the average dollar amount of merchandise orders placed was less for subscribers under age thirty-five than for those age thirty-five or over.
(E) Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.


答案（E）
自己把自己绕进去了求来个明白人解释下

xiqiong

题目： 两个调查：
1.关于杂志订购者的 ：订购者的所有商业orders中，只有30%是35岁以下人群构成的
2.关于广告商的：大部分商业orders来自于35岁以下人群。
问题：根据以上信息，下面哪一个一定正确？
A who never ordered 信息不足，无法确定
B now 信息不足，无法确定
C 信息不足，无法确定
D dollar 没提过，信息不足，无法确定
E 符合原文

和朋友一起看了你这道题~我实在是绕晕了~虽然答案选出来了~但是实在一直木有给出解释。
他帮你解释的哈~　

sophia王晗

xiqiong 发表于 2013-8-11 22:08
题目： 两个调查：
1.关于杂志订购者的 ：订购者的所有商业orders中，只有30%是35岁以下人群构成的
2.关于 ...

嗯，我也是能选出来可是越看题越晕。还是没懂题中的30%，most和E选项中的many之间都是些什么关系。而且，两个调查的描述中都好多定语，自己翻译出来总觉得有问题。

xiqiong

sophia王晗 发表于 2013-8-11 22:36
嗯，我也是能选出来可是越看题越晕。还是没懂题中的30%，most和E选项中的many之间都是些什么关系。而且， ...

给你看看一个简单的图~ 我刚刚做的~
（。。。。）表示全体的意思哈~  订阅者+没订阅者

sophia王晗

哦，这样子就清楚了~谢谢咯