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={1,2}, ={2,3},则( ) A.{4,5} B.{2,3} {1} {2}
{1,2,3,4,6} {1,2,3,4,5} {1,2,5} {1,2}
{1,3,4} {1,4} {3,4} {1,3}
{1,2,3,4,6} {1,2,3,4,5} {1,2,5} {1,2}
{2,4,5} {1,3,4} {1,2,4} {2,3,4,5}
={1,2,4},集合 ={3,6},则∁U.(A.∪B.)=( ) A.{1,2,4}B.{1,2,4,5} {2,4} {5}
{1,2,3,4,5} {1,4} {1,2,4} {3,5}
{2,4,5} {1,3,4} {1,2,4} {2,3,4,5}
{1} {3,5} {1,2,4,6} {1,2,3,4,5}
={1,2,3}, ={2,4},则(∁U.A.)∪B.为( ) A.{1,2,4}B.{2,4,5} {0,2,4} {0,2,3,4}
{1} {3,5} {1,2,4,6} {1,2,3,4,5}
{1,2,3} {1,3,5} {1,4,5} {2,3,4}
{1} {3,5} {1,2,4,6} {1,2,3,4,5}