问题
单项选择题
停工检修装置的物料必须全部退净，确属无法退出，所连接部位的管线必须（），并挂有内有物料，严禁动火的明显标牌。
A、水封
B、氮气保护
C、关闭阀门
D、加盲板
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
停工检修装置的物料必须全部退净，确属无法退出，所连接部位的管线必须（），并挂有内有物料，严禁动火的明显标牌。
A、水封
B、氮气保护
C、关闭阀门
D、加盲板
参考答案：D
| 完形填空。 | |||
| This is my 1 picture. My grandfather and grandmother 2 old. My father is 3 English teacher. He is 4 . My mother is a worker. 5 are students. We are in NO.2 Middle School. We 6 in the same grade. My brother is 7 Class 2, Grade 8. I'm in Class 3, Grade 7. 8 name is Lin Tao. My brother's name is Li Hai. He is 14. I'm only 9 . Our family all like us 10 . | |||
|