作者whisperheart (mione  N )
看板GRE_Verbal
标题[计量] 请问一题计量(来欣M4)
时间Thu Oct 11 19:15:21 2007
2. Whixh of the following CANNOT be the greatest common divisor of two
positive integers x and y?
(A) 1
(B) x
(C) y
(D) x-y
(E) x+y 答案是E
自己想不通 想请教大家一下 谢谢~
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