Let's ___________ the address on the right.[ ]
A. writeing
B. writing
C. write
答案:C
m3表示3个m的积是多少。[ ]
已知i为虚数单位,若复数(a-1)+(a+1)i为实数,则实数a的值为[ ]
A.-1
B.0
C.l
D.不确定