所谓看板就是一种作为信号性或指令性的传递卡片，应用与生产过程的各个环节，是控制和掌握零部件在各生产环节之间的生产时间、数量、进程的一种凭证依据。
参考答案：对
句型拓展。
1. What are you doing for vacation ?(作回答)
______________________________
2. I am leaving for Beijing next weekend.(提问划线部分)
_____ _____ you leaving for shanghai?
3. He is going to Beijing with his father.(提问划线部分)
_____ is he going to Beijing _____ ?
4. We are staying there for two days. (提问划线部分)
_____ _____ are you staying there?
5. They often go to Beijing for vacation.(提问划线部分)
_____ _____ they often go?
某大型企业应用了信息系统，其分布在各地的下属部门向总部递交数据时，一般采用的方式是通过________。
A．软盘
B．光盘
C．U盘
D．网络
shanghai?