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选用适当的符号填空:
已知集合A={x|x2-1=0},则有:
1________A,{-1}________A,________A,{-1,1}________A;
用适当的符号填空:
(1)A={1,2,3},B={1,2,3,4},则A________B;
(2)0________{0};
(3)0________;
(4)________{0};
(5){0,1}________{(0,1)}.
用适当的符号(∈,,=,,)填空:
(1)0________{0},0________,________{0};
(2)________{x|x2+1=0,x∈R},{0}________{x|x2+1=0,x∈R};
(3)________{a+b|a,b∈Q};
(4)设A={x|x=2n-1,n∈Z},B={x|x=2m+1,m∈Z},C={x|x=4k±1,k∈Z},则A________B________C.