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. Answer: E B 2条件如果不等式左边还除于100,则不 管什么时候,左边都必然小于右边,我估计是没有那个除于100, 如此,通过枚举法,可以有效的证明满足“2条件”时,确定了99年必然比97年多. 请高手帮忙解答~不甚感激 |