一、单项选择题
1.已知集合A={-1,1,2,4},B={x||x-1|≤1},则A∩B=()
(A){-1,2}.(B){1,2}.
(C){1,4}.(D){-1,4}.
2.(2+2i)(1-2i)=()
(A)-2+4i.(B)-2-4i.
(C)6+2i.(D)6-2i.
3.中国的古(试读)...