—Mum, can I have something _______?
—Oh, dear. You can only drink some water. There is _______ in the kitchen.
A:to drink; nothing else
B:drinking; something else
C:to eat; something else
D:eating; nothing else
如图是二次函数y=ax2+bx+c图象的一部分,图象过点A(﹣3,0),对称轴为直线x=﹣1,给出四个结论:
①b2>4ac;②2a+b=0;③a+b+c>0;④若点B(﹣52,y1)、C(﹣12,y2)为函数图象上的两点,则y1<y2,
其中正确结论是( )
①韩 ②赵 ③楚 ④魏