以下哪些接头是公头（针头）（）
A.NJ-13/8″C
B.NK-1/2″C
C.NK-7/8″C
D.N-J8C
参考答案：A, D
雷电流幅值（I）有么意义？
It demands artistic skill for a manager to ______ disputes among his employees.
A．rectify
B．rebuke
C．negotiate
D．reconcile
