问题
问答题 简答题
铝及铝合金焊接时，防止烧穿的方法有哪些？
答案
参考答案：铝及铝合金焊接时，防止烧穿的方法有：
1.改进操作技术，工作时集中精力；
2.调整焊点间距；
3.工件对准，装夹好；
4.保证气焊熔剂质量。
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铝及铝合金焊接时，防止烧穿的方法有哪些？
参考答案：铝及铝合金焊接时，防止烧穿的方法有：
1.改进操作技术，工作时集中精力；
2.调整焊点间距；
3.工件对准，装夹好；
4.保证气焊熔剂质量。
| 阅读短文,然后根据内容从方框中选中10个单词,并用其适当形式填空. | |
Seagulls swim well, but they do not often dive for fish. They are also good at 5 with their large wings. When a seagull is flying, he 6 his legs under his body. Tom often watched them 7 closer to the ground because he liked the way they 8 the air with their wings and brought down their feet before they 9 the ground. Mary liked to see them gliding (滑翔) over the sea as they often do, without their 10 moving, but she said she didn't like the noise they make. |