[求助]prep1-12

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.

答案为E

不懂

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第一题：

原文大意：

杂志订户：看到广告后，有30%的订户下单订购了广告产品；这些订户都是35岁以下的人。

广告商：看到广告后，大多数下单订购的人，都是35岁以下的人。也就是说，50%以上的人（订户+非订户），都是35岁以下的人。

答案E：看到广告后，有许多非订户订购了广告产品。

A：看到广告后，没定购产品的人中，35岁以上的人比35岁以下的人更多。（与题目无关，题目没有说明“没定购产品”的人比例如何）

B：在订户中，35岁以下的人，今年的比例明显比去年低。（无关，题目未提及今年和去年的对比关系）

C：看到广告后，定购的人中，大多数是35岁以上的订户。（答案歪曲了事实，认为大多数定购产品的人是订户，为包含非订户；而且，原文说，大多数是35岁以下的订户）

D：35岁以下的订户的定购额，比35岁以上的人少。（无关，原文未提及定购额）