prep 1-12

12.   (25359-!-item-!-188;#058&001894)

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?

(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.

答案是E，不明白题干到底在比什么~

请把题目贴出来，方便回答你问题的人。

我也还不知道,只能记答案了!

1.对S杂志用户的调查显示：在因为看了广告而买东西的人中，30％来自于年龄在35岁以下的杂志订阅人。

2.对S杂志广告商的调查显示：因为看了S杂志上的广告而买东西的人大部分年龄在35岁以下。

1，2的结果都是针对看了S杂志广告而买东东的人；

由1可知，这些人中30％满足两个条件：a,35岁以下；b,是杂志订阅人

由此推出，剩余的70％（也就是其中大部分人）要么非a--不在35岁以下，要么非b--不是杂志订阅人。

由2可知，这些人中的大部分都在35岁以下，即a

联合1，2，推出非b,即这些人中的大部分不是杂志订阅人。答案为E

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.

我觉得这个是说：30%看到广告买东西的订户在35岁以下

 （我觉得剩余的70%他说的还是订户，但不是35岁以下）

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.

大多数人看到广告买东西的是35岁以下

说明有一些人看了广告买东西的不是订户，即E

(E) Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.

很多看到广告买东西的人不是订户，

注意他这里用的many，我觉得很好，只要是多出来就可以用many，5个人也可以用many。不一定非要是大多数，跟70%无关