动手操作
A. taller B. saw C. ton D. smaller E. bored F. happy G. size H. angry
I. visited J. younger K. sad L. older M. watched N. went O. longer
P. excited Q. won R. metre S. more T. kilogram U. tired V. read
如图，在平面直角坐标系中，抛物线y=ax2+bx+c的顶点坐标为（2，9），与y轴交于点A（0，5），与x轴交于点E、B．
