A:should
B:must
C:could
D:might
Name
Age
Height
Weight
Sarah
11
1.52 metres
35 kilograms
Liu Yun
13
1.60 meters
41 kilograms
Mike
10
1.65 meters
40 kilograms
参考句型: Sarah is . . . than Liu Yun. Liu Yun is . . . than Mike.
在大型游乐场里,小明乘坐如图所示匀速转动的“摩天轮”,正向最高点运动.对此过程,下列说法正确的是( )
若以F1(﹣3,0),F2(3,0)为焦点的双曲线过点(2,1),则该双曲线的标准方程为____