只要会操作，允许非信号工代替信号工传发信号。
参考答案：错
—We are going to Hawaii with my parents this month.
— [ ]
A. Have a good time!
B. Best wishes to you!
C. Congratulations I
D. Please go.
企业日常生产的基本环节不包括( )。
A．生产 B．包装 C．供应 D．销售
