为下列句子排序组成一段对话。

1. Mr Baldwin is my music teacher.

2. What's your favorite subject?

3. Why do you like music?

4. My favorite subject is music.

5. Because it's relaxing.

6. Who's your music teacher?

正确的序号:__________________

工作面支架推拉头连接的标准是（）

A、正确使用标准连接销

B、每个销要配用标准垫圈

C、正确使用标准的开口销

D、严禁别销插不到位或单腿用别销