（）是集散控制系统的中枢，它连接DCS的监测站、控制站、操作站以及上位机等部分，实现数据、指令和其他信息的相互传递，从而实现整个系统协调一致的工作，进行数据和信息共享。

A.操作工

B.通信网络

C.控制计算机

D.工程师

短文改错

     Attention please,everyone.We have accepted the weather forecast on the radio this morning that there

will have a heavy rain tonight.Be sure shut the windows and doors until you leave your classrooms.The

sports meet that we planned to hold on tomorrow will be put off.After it becomes fine,we'll make other

announcement.We will have classes on Wednesday as usually.Since it is colder tomorrow,please dress on

more clothes in time.Those who comes to school by bike,don't keep your umbrella open while riding.

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