牙轮绕钻头轴线所做的旋转运动称为（）。
A、钻头的自转
B、钻头的公转
C、牙轮的公转
D、牙轮的自转
参考答案：C
郄穴多用于治疗
A．头面躯干和内脏病
B．急性病
C．脏腑病
D．局部与全身病
E．其所属范围的病证
__________no one for him to turn to, Li Lan suddenly felt helpless and hopeless.[ ]
A. There was
B. As it was
C. For there was
D. There being
