— 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
小强在显微镜下观察到了洋葱表皮细胞后,兴奋地向同学描述,并把显微镜轻轻挪动给同组同学,但别人却看不清物像.你认为最可能的原因是( )
已知O为△ABC的外心,|AB→|=16,|AC→|=102,若AO→=xAB→+yAC→,且32x+25y=25,则|AO→|=____
____