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拜厄钢琴基本教程70音阶练习65交替音阶·反向音阶
前面是左右手的交替音阶，后面是左右手的反向音阶。
拜厄钢琴基本教程-练习72/82
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App00:53打开App观看
前面是左右手的交替音阶，后面是左右手的反向音阶。
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