鳞状细胞癌的好发部位是()
A.头面部
B.颈部
C.躯干
D.足底
参考答案:A
设函数f(x)=x3-3ax2+3bx的图象与直线12x+y-1=0相切于点(1,-11).
(Ⅰ)求a,b的值;
(Ⅱ)讨论函数f(x)的单调性.
I _________ wash the kitchen. [ ]
A. is going to
B. going to do
C. am going to