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play tennis
Author:
李春培
play tennis
GeoGebra
New Resources
兩位數除以一位數（二）
找出對稱軸
四邊形的特性
四邉形 (四年級) 教師版
直角坐標平面上的旋轉變換
Discover Resources
Locus 軌跡(3T)
S5 geometry
底圖為圓，截面為半圓
平面與正立方體的截痕
operations of matrix 2rd ver
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Linear Programming or Linear Optimization
Kite
Vectors
Statistical Characteristics
Optimization Problems