设全集 U={1,2,3,4,5,6}U = \{1,2,3,4,5,6\}U={1,2,3,4,5,6},集合 A={2,4,6}A = \{2,4,6\}A={2,4,6},则 CU(A)C_U(A)CU(A)(即 AAA 关于全集 UUU 的补集)等于( )