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重难题组周练（1）——二次函数
Author:
程洁
Topic:
Quadratic Functions
GeoGebra
New Resources
球體建築師
四邊形的特性
兩位數除以一位數（二）
四邉形 (四年級) 教師版
畫出對稱圖形
Discover Resources
畢氏定理的證明(三移動)
複合圖形(二)
p05 eqidistant from two lines
普一甲詹詠宇4
立體旋轉卡片
Discover Topics
Reflection
Means
Dilation
Differential Equation
Solids or 3D Shapes