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简谱乐理知识34：键盘演示C调 D调 F调音阶，这是学习乐器的基础
结合键盘讲解示范C调、D调、F调的音阶，这是学习乐器的基础，这节课大家一定要掌握住C大调的音级关系：全全半 全全全半
零基础学简谱乐理知识视频合集25/91
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