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【判断题】

CO2气体保护焊的熔滴过渡形式主要有滴状过渡、短路过渡和潜弧射滴过渡三种。( )

A.
正确
B.
错误
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】滴状罐是属于()。

A.
固定顶罐
B.
活动顶罐
C.
浮顶罐
D.
特形罐

【单选题】CO2气体保护焊的优点是( )。

A.
生产效率高
B.
温度高,能量集中
C.
能焊接易氧化的有色金属
D.
具有较大冲击力

【单选题】Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, choose the best answer from the four choices marked A),...

A.
He collected it from the newspaper he subscribed to.
B.
He found it when thumbing through a magazine.
C.
He chanced upon it on a fridge when visiting a friend.
D.
He worked for the financial newspaper IBD.

【多选题】()属于非对称短路。

A.
单相短路
B.
两相短路
C.
两相接地短路
D.
三相短路