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keddy940199
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
找出對稱軸
三位數除以一位數(一)
三位數除以一位數(二)
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椭圆画法wj
立體線圈
tetrahedron_refection
二進位翻牌
Solid geometry
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Integral Calculus
Vectors 3D (Three-Dimensional)
Arithmetic
Multiplication
Trigonometry