—Mr. Smith, would you please speak a little more ________?—Sorry! I thought you could follow me.
A:quietly
B: slowly
C:quickly
D:politely
下列没有错别字的一组是( )
如图,抛物线y=﹣x2+bx+c交x轴于点A(﹣3,0)和点B,交y轴于点C(0,3).