矩阵乘法规律k(AB)=(kA)B
A. 对
B. 错
I just want to hear your ____________.
A. voice
B. sound
C. noise
D. vest
I didn't go to any Halloween parties this year, I wasn't really in the ______.
A. would
B. mood
C. model
D. mock
Hey, Sam,_______on one second, please.
A. hold
B. told
C. held
D. hole