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【简答题】
划擦法操作是在焊机电源开启后,将焊条末端对准焊缝,并保持两者的距离在 以内,依靠手腕的 ,使焊条在零件表面 一下,并立即 2 mm ~ 4 mm ,电弧引燃,然后开始正常焊接。
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皮皮学刷刷变学霸
举一反三
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as
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overestimate
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【单选题】How to approach Reading Test Part Four •This part of the Reading Test tests your vocabulary •Read the whole text quickly to find out what it is about. As you read, try to predict the words that might ...
A.
consolidating
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amalgamating
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incorporating
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integrating
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