外力干扰过大使身体重心超出其稳定极限时,人体常采用哪种模式保持平衡()
A.踝关节模式
B.膝关节模式
C.髋关节模式
D.跨步动作
E.下肢稳定
参考答案:D
The prize of the game show is $30,000 and an all expenses _______ vacation to China.
A.paying
B.paid
C.to be paid
D.being paid