問(wèn)題補(bǔ)充:?jiǎn)芜x題 若曲線C:y=x3-2ax2+2ax上任意點(diǎn)處的切線的傾斜角都是銳角,那么整數(shù)a的值等于?
A.-2
B.0
C.1
D.-1
答案:C