涠12-1油田PRIMARY ESD PLC与SECONDARY ESD PLC之间_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

涠12-1油田PRIMARY ESD PLC与SECONDARY ESD PLC之间是通过中控系统内部（）相连

A、光纤

B、通信总线

C、微波通信

D、卫星通信

答案

参考答案：B

选择题

—Is there anything wrong, Bob? You look sad.

—Oh, nothing much. In fact , I ____ of my friends back home.

A．have just thought

B．was just thinking

C．would just think

D．will just be thinking

问答题简答题

如何防止室内电线起火？