Look at the picture. Who is the girl? She is my friend. Her name is Alice Black. She is an English girl.

    Alice has a big family. Her grandparents have two daughters and one son — her father. Alice lives with her grandparents, parents, two brothers and one sister. Alice has two dogs — Bobby and Tony. Bobby is black and Tony is white. Alice likes them very much. Alice is a middle school student. She has a good friend at school. Her name is Helen. They are cousins, too.

如图，在平面直角坐标系xoy中，已知抛物线经过点A（0，4），B（1，0），C（5，0），抛物线对称轴l与x轴相交于点M．