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向量求和动画演示
Author:
孟洪刚
GeoGebra
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兩位數加法
四邉形 (四年級) 教師版
錐體建築師
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等的四邊形
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認識正方形
Quiz on Polar Coordinates (1) 極坐標測驗1
三角形中線定理求最小值
Copy of 分數與小數
第四次:20190308
Discover Topics
Pyramid
Right Triangles
Step Functions
Differential Equation
Coordinates