坚持党的基本路线不动摇，关键是坚持改革开放不动摇。

判断：___________      ­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­

理由：

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钨极氩弧时，常采用直流正接。