某企业车间的水电费如下表所示,则其中的固定成本为()
A.2000
B.1000
C.1500
D.1200
参考答案:B
The headmaster told the boy________the angry teacher,but he refused to.[ ]
A.to apologize
B.apologize to
C.to apologize for
D.to apologize to
PPP验证成功后,将由Authenticate阶段转入什么阶段()。
A.Dead
B.Establish
C.Network
D.Terminate