Aset of numbers has the property that for any number t in the set, t + 2 is inthe set. If –1 is in the set, which ofthe following must also be in the set?
I. -3 II. 1 III. 5
A. Ionly B. IIonly C. Iand II only D. IIand III only E. I,II, and III 这道题为什么选D 而不选 E呢
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2011-9-4 20:07:56
收藏
收藏
楼主