问题
填空题
PLC机与PLC机之间的连接，构成（）系统。
答案
参考答案：同位机
搜题请搜索小程序“爱下问搜题”
PLC机与PLC机之间的连接，构成（）系统。
参考答案：同位机
| 小医生, 下列各句均有一处错误, 请找出并改正。 | |
| 1.He went to bed after he finishing his homework. 2.We’ll go for a picnic if it will be fine tomorrow. 3.She arrived at Beijing the day before yesterday. 4.They took the ill man to the hospital. 5.After a long walk he was tired, so he stopped having a rest. | _____ _____ _____ _____ _____ |