— __________ you got a computer?
— Yes, I have. [ ]
A. Do
B. Will
C. Have
D. Are
答案:C
先化简,再求值:5(3x2y﹣xy2)﹣4(﹣xy2+3x2y),其中x=﹣2,y=3.
SIN840C 可以()。