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【多选题】
选择高频焊工艺参数，主要包括电源频率、（）、输入功率、焊接速度及焊接时的顶锻压力等。A.
会合角
B.
管坯坡口形状
C.
触头感应圈
D.
阻抗器的安放
E.
焊接电流
手机使用
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反馈参考答案：
举一反三
【单选题】-Do you know now? -In the People’s Hotel.
A.
where is Tom working
B.
where did Tom work.
C.
where Tom is working
D.
where Tom worked.
【单选题】你问你同桌Tom 会不会游泳时，应说： . [ ]
A.
Do you swim, Tom?
B.
Do you like swimming, Tom?
C.
Can you swim, Tom?
【简答题】Tom: What do you do in your free time? Jack: I always listen to music, and 小题1:______ Tom: Well, I see. You like music very much! 小题2:______ Jack: My father often reads newspapers. 小题3:______ Tom: Do ...
【单选题】— Do you know _________ now? — In the People’s Hotel.
A.
where is Tom working
B.
where Tom is working
C.
where did Tom work
D.
where Tom worked
【单选题】Find out the right structure of the sentence“We call the boy Tom”.
A.
S+V
B.
S+V+P
C.
S+V+DO+OC
D.
S+V+IO+DO
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