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正餘弦函數疊合
Author:
陳隆期
GeoGebra
New Resources
異分母分數減法
拼砌四邊形
【案例】圆柱体内放置一个大球六个小球
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
Discover Resources
[S2] a revised version of Jane’s GeoGebra file (modified by the author)
七巧板
Angle between 2 planes
网络资源使用说明
百分數、分數和小數互化
Discover Topics
Definite Integral
Scalene Triangles
Linear Regression
Logarithm
Step Functions