问题
填空题
点焊前必须对工件进行（）、（）和（）处理。
答案
参考答案：酸洗；喷砂；打磨
搜题请搜索小程序“爱下问搜题”
点焊前必须对工件进行（）、（）和（）处理。
参考答案：酸洗；喷砂；打磨
| 从A、B、C中选择恰当的一项填入括号内，补全对话。 |
( ) 1. | A. Hi, John. B. Hello. What's your name? C. See you, John. |
( ) 2. | A. Hi, thank you. B. Good morning, Miss. C. OK. Great. |
( ) 3. | A. Hello. Let's go to school. B. Nice to meet you. C. Good afternoon. |
( ) 4. | A. Fine. This is Tom. B. Very well. Thank you. C. How are you, Mike? |
( ) 5. | A. I like red. B. Me too. C. Good morning. |
( ) 6. | A. Hi, Zoom. B. Hello, this is Zoom. C. I'm fine, thank you. |