The women’s club _________ Lin, a foreign company employee who used to pay little attention to her appearance, to improve her dress style and become more confident and open-minded.

A．enabled

B．had enabled

C．has enabled

D．enables

如图所示，大人和小孩做跷跷板游戏，小孩离转轴距离比较大，则在跷跷板转动过程中有

A．小孩的线速度比较大

B．小孩的角速度比较大

C．小孩的向心力比较大

D．小孩的向心加速度比较大