A:1+i
B:1-i
C:-1+i
D:-1-i
在空间直角坐标系中,已知A(m,n,1),B(3,2,1)关于z轴对称,则m+n=____
My idea ________ to be true.
繁茂____
索性____
居然____
挨近____
What was the boy searching ________?