求救~GWD1--30

yaoyao3636 · 发表于 2009-4-4 18:42:00

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.

Answer: D

我选了A,觉得（2）算不出来，谁给解释下？

yaoyao3636 · 发表于 2009-4-4 18:46:00

UP~

牛人看完给解答下哦~

yaoyao3636 · 发表于 2009-4-4 20:56:00

顶啊

vivien_hu · 发表于 2009-4-4 21:35:00

疑惑中。。。

yaoyao3636 · 发表于 2009-4-4 22:14:00

自己顶

ccccccccccab · 发表于 2009-4-4 23:36:00

zzhGGforever · 发表于 2009-4-5 00:52:00

。。。不会吧，是选A的，答案是不是错了？

nn_CDkong · 发表于 2009-4-6 17:01:00

同问~我也选的A

zhangjinjing · 发表于 2009-4-6 19:44:00

弱弱的问下，为什么A是对的。。。只有一个方程，怎么解的出两个未知数？

hanheli · 发表于 2009-4-6 19:56:00

以下是引用zhangjinjing在2009-4-6 19:44:00的发言：

弱弱的问下，为什么A是对的。。。只有一个方程，怎么解的出两个未知数？

因为邮票必须是整数,所以......

是不是答案错了?B的话是不可以的呀......

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