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标题: taotao-1-30，感觉答案有问题 [打印本页]

作者: xiexiang 时间: 2010-9-27 06:59 标题: taotao-1-30，感觉答案有问题

Q30:

Joanna bought only $0.15 stamps and $0.29 stamps.  How many $0.15 stamps did she buy?

(1)    She bought $4.40 worth of stamps.

(2)    She bought an equal number of $0.15 stamps and $0.29 stamps.



A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

答案是D，我给的是A。。。

作者: IMARCUS 时间: 2010-9-28 06:45

应该是a

2什么都没有啊

答案是10，10 吧？

作者: xiexiang 时间: 2010-9-28 19:55

嗯，那，5,10,15代一下就出来了。

作者: wangliming 时间: 2010-9-29 20:03

题以前就有过争论。不过题号与此不同。

赞成选A.

作者: sumerlaws 时间: 2010-9-30 22:01

应该是D

可设方程式:0.15X+0.29X=4.40, 结果得 10

作者: rosswye 时间: 2010-10-4 22:06

赞成A
2需要同1联系起来才能出答案，单独不成立。
不过想问一下，1的数是代进去一个一个试出来的吗？

作者: captain_mas 时间: 2010-10-5 06:33

对啊,B有说equal number

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