一、选择题
1.集合M={2,4,6,8,10},N={x|-1<x<6},则M∩N=()
(A){2,4}.(B){2,4,6}.
(C){2,4,6,8}.(D){2,4,6,8,10}.
2.设(1+2i)a+b=2i,其中a,b为实数,则()
(A)a=1,b=-1.(B)(试读)...