.用∈或∉填空:
(1)若A={x|x2=x},则-1________A;
(2)若B={x|x2+x-6=0},则3________B;
(3)若C={x∈N|1≤x≤10},则8________C;
(4)若D={x∈Z|-2<x<3},则1.5________D.