问题 选择题 已知P={-2,0,1},Q={x|-1≤x≤1},则P∩Q=( )A.{-2,0,1}B.{0,1}C.∅D.{0} 答案 ∵P={-2,0,1},Q={x|-1≤x≤1},∴P∩Q={0,1}.故选B