已知抛物线y=ax2+bx+c的图象顶点为(-2,3),且过(-1,5),则抛物 发布时间:2017-05-12 15:47 │ 来源:www.tikuol.com 题型:填空题 问题: 已知抛物线y=ax2+bx+c的图象顶点为(-2,3),且过(-1,5),则抛物线的表达式为______.
题型:填空题 --- What did Lucy do yesterday afternoon? --- She ____ her parents do the housework.A.helpB.helpedC.will helpD.is helping 查看答案