题目内容
设全集U={1,2,3,4},则集合A="{1," 3},则CUA=( )
A.{1, 4} | B.{2, 4} | C.{3, 4} | D.{2, 3} |
B
试题分析:∵全集U={1,2,3,4},集合A="{1," 3},∴CUA="{2," 4},故选B
点评:熟练掌握补集的概念是解决此类问题的关键,属基础题
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题目内容
A.{1, 4} | B.{2, 4} | C.{3, 4} | D.{2, 3} |