[求助]GWD31 8-29

Q29:

The annual rent collected by a corporation from a certain building was x percent more in 1998 than in 1997 and y percent less in 1999 than in 1998.  Was the annual rent collected by the corporation from the building more in 1999 than in 1997?

(1)       x > y

(2)      ( _{^{xy / 100)}}< x – y

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.

给的答案是B  可是我选A
研究半天还是搞不定
请哪位大侠出手相救一下  谢谢

upup

求救   求救

（1+x%）（1-y%）和1比较

化简得到是B

这种题目要注意的是，题目问的是：

Was the annual rent collected by the corporation from the building more in 1999 than in 1997?

所以不管B得到的是肯定的还是否定的都是正确答案，不要上当