下列牙拔除使用扭转力为主的是（）
A.上颌中切牙
B.下颌中切牙
C.上颌磨牙
D.下颌双尖牙
E.上颌双尖牙
参考答案：A
Once telling him the truth，________.
A．he will be nervous all the time
B．he will find himself nervous all the time
C．you will find him nervous all the time
D．everyone will find him nervous all the time
在加权平均法下，每股净利润的计算公式为（）
A.
B.
C.
D.
