药品生产验证包括
A．系统验证
B．设备安装、运行、性能确认
C．厂房验证
D．设施安装、运行、性能确认
E．产品验证
参考答案：B,C,D,E
— You were out when I dropped in at your house.— Oh, I ____ for a friend from England at the airport.
燃气是人工煤气、（）、液化石油气三类的统称。
A.天燃气
B.沼气
C.油制气
D.煤气
