问题
单项选择题
埋弧焊时焊接速度过高，则会造成()等缺陷。
A．下塌
B．咬边
C．热裂纹
D．焊瘤
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
埋弧焊时焊接速度过高，则会造成()等缺陷。
A．下塌
B．咬边
C．热裂纹
D．焊瘤
参考答案：B
| 从方框内选单词，用其适当形式填空。每空限填一词，每词限用一次。 | |
2. The person is very . He can give us a satisfied answer. 3. What should we do to help stop ? 4. A serious language should not make such foolish mistakes. 5. What do you think is the most invention? 6. Since then, the of basketball has risen worldwide. |
