操作定义
参考答案：
一个概念应由测定它的程序来下定义。布里奇曼对一个心理现象根据它们的程序下定义叫操作定义。
— Did you see the beginning of the film?
— No. It ________ for 20 minutes when I got to the cinema. [ ]
A. has been on
B. had been on
C. had begun
D. has begun
下列不属于检察官职业道德特征的有( )。
A．自律性
B．强制性
C．表率性
D．正当性
