— In the present, most of us have no enough money to afford the houses.
— Yes, they are too expensive in Shenzhen.
A:Now
B:Before
C:Soon
如图,抛物线y=﹣ 12 x2+mx+n与x轴交于A、B两点,与y轴交于点C,抛物线的对称轴交x轴于点D,已知A(﹣1,0),C(0,2).
以下关于超重和失重的描述正确的是( )