A:违背规律必然受到规律的惩罚
B:认识并遵循事物发展的规律性
C:充分发挥正确意识的积极作用
D:要坚持从实际出发
— How are you today, Kate?— I feel even now. I don't think this medicine is good for me.
若二次函数y=ax2+bx+c (a≠0)的图象与x轴有两个交点,坐标分别为(x1,0),(x2,0),且x1<x2,图象上有一点M (x0,y0)在x轴下方,则下列判断正确的是