补油后要检查瓦斯继电器，及时放出气体，（）h无问题再将重瓦斯_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

补油后要检查瓦斯继电器，及时放出气体，（）h无问题再将重瓦斯接入跳闸位置。

A.3

B.6

C.12

D.24

答案

参考答案：D

选择题

The boy, ________ with his school work every day, felt rather tired and wanted to have a whole day to relax.

A．occupying

B．having occupied

C．occupied

D．being occupied

单项选择题

涠12-1油田应急关断PLC的CPU模块1785-L40E的面板CHANNEL2是（）通信通道口

A、RS422数据

B、DH+数据

C、REMOTEI/OSCANNER数据

D、15-PINETHERNET数据