涂刷冷底子油的作用是（）。A、防止油毡鼓泡 B、防水 C、气密_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

涂刷冷底子油的作用是（）。

A、防止油毡鼓泡

B、防水

C、气密性、隔热性较好

D、粘结防水层

答案

参考答案：D

填空题

请在方框内选择适当词语填入句中，使其完整流畅。

English doctor students front play
There colour under singing summer

1. ________ are 20 books on the desk.
2. What's this in ________?
3. We are ________. We like school.
4. The library is in ________ of the lab.
5. I can _______ the piano.
6. What ________ are trees? They're green.
7. My mother is a ________ in a hospital.
8. It's hot in ________. I like swimming.
9. My shoes are ________ the bed.
10. I like ________. I can sing many songs(歌曲).

判断题

矿山电气设备、线路必须有可靠的避雷、接地装置，并定期进行检修。