题目
题型:单选题难度:简单来源:不详
A.2 | B.3 | C.4 | D.8 |
答案
∴3,4,5一定是集合B中的元素,1和2可能是集合B的元素,
则集合B可能是:{3,4,5},{1,3,4,5},{2,3,4,5},{,,2,3,4,5}共4个.
故选C.
核心考点
举一反三
A.27 | B.26 | C.9 | D.8 |
A.{0,1} | B.{-1,0,1} | C.{0,1,2} | D.{-1,0,1,2} |
题型:x+1|>1},则(CUA)∩B=( )
A.(-2,1) | B.(-∞,-2]∪(1,+∞) | C.[-2,1) | D.(-∞,-2)∪(1,+∞) |
A.[1,2] | B.[0,2] | C.[1,4] | D.[0,4] |
A.{0,1,3,5,7} | B.{0,1,3,5,7,9} |
C.{1,3,5.7} | D.{1,3,5,7,9} |