- _________are his football clothes?
- Under the bed.
A:Where
B:Who
C:Whose
D:What
如图,已知双曲线C:x2a2-y2b2=1(a>0,b>0)的右顶点为A,O为坐标原点,以A为圆心的圆与双曲线C的某渐近线交于两点P、Q,若∠PAQ=60°且OQ→=3OP→,则双曲线C的离心率为( )
— Mom, where is my eraser? Please help me it.
— Oh, it's in the schoolbag.
关于食物中的水说法不正确的是( )