Don't talk ____ (loud) in the library.
0.34÷0.57的商精确到0.01是( )
如图,抛物线y=ax2+bx+c(a≠0)的图象过点M(﹣2, 3 ),顶点坐标为N(﹣1, 433 ),且与x轴交于A、B两点,与y轴交于C点.