108新課綱｜國中｜九上數學｜【概念】特殊直角三角形的三角比
Synopsis
訂閱開啟小鈴鐺，就能即時收到最新課程上架通知喔！ 觀看時，請開啟CC字幕。 速度太快？調整播放速度為0.75倍速，放慢 ...
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