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黎曼和與積分
Author:
蕭富偉
GeoGebra
New Resources
判斷球體
球体的体积推导（优化版）
兩位數加法
兩組對邊相等的四邊形
球体的体积推导
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Clock24hour
拋射問題
超快國旗
未完成
开关灯
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Straight Lines
Rotation
Linear Regression
Trigonometry
Prism