安全状况等级达不到3级的在用压力管道，能否使用是依据（）来确定。
A、检验报告
B、登记注册机构意见
C、安全评定
D、安全监察机构意见
参考答案：C
---You look very tired.
---Well, __________my lessons all the afternoon.
A．I have reviewed my lessons
B．I have been reviewing
C．I reviewed
D．I had reviewed
简述企业管理中例外原则的含义是什么？
