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相机光圈模拟（3D）
Author:
孟宝兴
Topic:
Mode
GeoGebra
New Resources
第八周作业
異分母分數減法
畫出對稱圖形
兩組對邊相等的四邊形
兩位數加法
Discover Resources
包含除法（1 ÷分數）
Elementary school math
複合圖形(八)
圖解直式開方
中国纸质灯笼
Discover Topics
Differential Equation
Right Triangles
Piecewise Functions
Scalene Triangles
Triangles