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kwwong
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
四邊形的特性
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橢圓
坐标变换
Measuring Volume 3
Pyth2LK
运动变化的二次函数图象.许兴华数学
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Prism
Constructions
Logic
Tree Diagrams
Dilation