电梯安装工程，牵引绳头组合必须安全可靠，且每个绳头组合必须安_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题多项选择题

电梯安装工程，牵引绳头组合必须安全可靠，且每个绳头组合必须安装（）

A、防断裂装置

B、防螺母松动安装

C、安全装置

D、自动拧紧装置

E、防脱落装置

答案

参考答案：B, E

填空题

请根据各句上下文的意义，选择正确的单词填入空白处。

musician, instrument, loosely, passer-by, extra,
reputation, afterwards, frog, unknown, earn

1. My sister takes an interest in music and she can play some musical _______.
2. Sorry, I don't know where the post office is. I am a _______.
3. As soon as his first novel was published, he earned a _______.
4. _______ have very long back legs for jumping.
5. The old couple _______ their living by collecting and selling used plastic bottles.
6. X is often used to represent an _______ number.
7. After the lunch we parted, so I didn't know what happened to him _______.
8. I get a low salary so sometimes I work _______ to earn more.
9. He fastened the belt _______ around his waist.
10. Beethoven, a great German _______, lived between 1770 and 1827.

判断题

所谓开发地方课程和校本课程就是意味着要编写教材。( )