斜井运送人员前，必须检查人车的连接装置、保险链和防坠器，并必_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

斜井运送人员前，必须检查人车的连接装置、保险链和防坠器，并必须先放（）次空车。

A.1

B.2

C.3

D.4

答案

参考答案：A

填空题

用方框里适当的短语完成句子。

have nothing to do out of breath dozens of see sb.writing do with lie reading
hear sb.singing in the beginning in the end get ready to

1. I’m      leave the theater for another.
2. The man       but to lie down on the grass in the garden last week.
3. The old man goes upstairs       .
4. The composer didn’t know what he      the concert.
5. There are       musical instruments in the orchestra.
6. Li Ping likes       in bed,but his parents said it’s too bad for eyes.
7. When I went into the classroom,I       the girl       at the desk.
8. When the teacher walked past,he       the students       .
9.       he didn’t like reading English but       he liked it.

问答题简答题

简述天然树脂类涂料的组成及配制方法。