1.(2017·高考浙江卷)已知集合P={x|-1<x<1},Q={x|0<x<2},那么P∪Q=( A )
A.(-1,2) B.(0,1)
C.(-1,0) D.(1,2)
2.(2018·高考浙江卷)已知全集U={1,2,3,4,5},A={1,3},则?UA=( C )
A.∅ B.{1,3}
C.{2,4,5} D.{1,2,3,4,5}
3.(2018·丰台区二模)已知A={x|x>1},B={x|x2-2x-3<0},则A∪B=( D )
A.{x|x<-1或x≥1} B.{x|1<x<3}
C.{x|x>3} D.{x|x>-1}
解析:A={x|x>1},
B={x|x2-2x-3<0}={x|-1<x<3},则A∪B={x|x>-1}.故选D.
4.已知集合A={-2,0,2},B={x|x2-x-2=0},则A∩B=( B )
A.∅ B.{2}
C.{0} D.{-2}
5.已知集合A={1,2,3,4},B={x|x=n2,n∈A},则A∩B=( A )
A.{1,4} B.{2,3}
C.{9,16} D.{1,2}
6.已知集合M={x|(x-1)2<4,x∈R},N={-1,0,1,2,3},则M∩N=( A )
A.{0,1,2} B.{-1,0,1,2}
C.{-1,0,2,3} D.{0,1,2,3}