【单选题】设集合U={x|x是小于9的正整数},集合A={1,2,3},集合B={3,4,5,6},则? U A∩? U B=( )
【单选题】设集合P={1,2,3,4},Q={x|3≤x<7,x∈N},则P∪Q=( )
【单选题】设集合U={x∈N|0<x≤8},S={1,2,4,5},T={3,5,7},则S∩(C U T)= [ ]
【单选题】若集合U={1,2,3,4,5,6,7},A={1,3,5,7,},B={1,3,5,6,7},则集合? U (A∩B)是( )
【单选题】已知全集U={1,2,3,4,5,6},集合A={x|x 2 -7x+10=0},B={2,3,6},则集合(? U A)∩B=( )