问题
单项选择题
根据《弧焊设备第12部分:焊接电缆耦合装置》(2013)绝缘电阻,新的耦合装置经温热处理后的绝缘电阻应不低于()±МΩ。
A.2
B.2.5
C.3
D.3.5
答案
参考答案:B
根据《弧焊设备第12部分:焊接电缆耦合装置》(2013)绝缘电阻,新的耦合装置经温热处理后的绝缘电阻应不低于()±МΩ。
A.2
B.2.5
C.3
D.3.5
参考答案:B
选词填空。(用方框中所给的词的适当形式填空) | |
everyday. 2. Don't worry about your mother's _______. 3. Thanks for _______ me to visit next week. 4. There are _______ of people buying things on weekends. 5. Please tell me the _______ story, we want to know all about it. |