请教PREP 1-12 ,关系理不清,谢谢!

christinawu

如下,做了很久, 没明白,谁能告诉我应该怎么做??,芬特

THANK YOU!

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.

christinawu

自己UP,

eggegg

哪位NN帮忙解答下呀？？

yeehang

前者提到的买家只局限在杂志订阅者；后者则是针对所有的买家。

fff777

以下是引用christinawu在2008-9-1 11:52:00的发言：

如下,做了很久, 没明白,谁能告诉我应该怎么做??,芬特

THANK YOU!

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?

 确实很耗神，不过仔细看题目后倒是很容易了。  条件1说 订户中30%看到广告买东西  条件2说大多数（假设为90%）看了广告就买的人是年轻人

说明这60%的差别是解题关键， 那他们应该不是订户阿 E给了这个解释Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.   还是要用白痴原则， 题目没说的坚决不用。

 确实很耗神，不过仔细看题目后倒是很容易了。  条件1说 订户中30%看到广告买东西  条件2说大多数（假设为90%）看了广告就买的人是年轻人

说明这60%的差别是解题关键， 那他们应该不是订户阿 E给了这个解释Last year many people who placed orders for merchandise in response to advertisements in Systems were not subscribers to the magazine.   还是要用白痴原则， 题目没说的坚决不用。

(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.

未必，也有非用户order  基数是所有order  如果说是订户order中，〉35岁多，就对了

(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.

没办法1987

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.

ychen34

3楼言简意赅