A:①③⑤
B:①④⑤
C:②③⑥
D:②④⑥
已知函数f(x)=ax2+2x+1,-2<x≤0ax-3,x>0有3个零点,则实数a的取值范围是 ____.
— Mum, I've got ________ important to tell you.
— What's up(怎么了)?