Q33: 150, 200, 250, n Which of the following could be the median of the 4 integers listed above? I. 175 II. 215 III. 235 A. I only B. II only C. I and II only D. II and III only E. I, II, and III 我的Answer: E
答案是C...感觉215和235在这题中的意义是一样的吧,都属于200~250,请指教 Q34: The operation Θ is defined by x Θ y = 1/x +1/y for all nonzero numbers x and y. If z is a number greater than 1, which of the following must be true? I. x Θ (-z) = 0 II. z Θz/(z-1) = 1 III. 2/z Θ 2/z = z
A. I only B. I and II only C. I and III only D. II and III only E. I, II, and III 我的 Answer: D
答案是E,第一个怎么样都是不对的吧。。。也请指教。。谢谢
[此贴子已经被作者于2009/9/10 11:47:27编辑过] |