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螢橋國中
GeoGebra
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拼砌四邊形
兩位數除以一位數(一)
兩位數加法
球体的体积推导
柱體建築師
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餘弦定理的圖形證明2
全等三角形
动态演示
[洋葱] 2019河北中考25 圆与四边形
二項分佈 的複本
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Planes
Vectors 2D (Two-Dimensional)
Optimization Problems
Cuboid
Random Experiments