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三原色（颜色相加与相乘）
Author:
阳光
Topic:
Constructions
GeoGebra
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GeoGebra笔记功能体验课件
画直线等分三角形的面积
異分母分數減法
拼砌四邊形
【案例】2018年全国1卷理科12题
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Key stage 1
大斜方截半立方體
Angle at centre twice angle at circumference
光的折射
抛物线的参数方程的副本
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Cylinder
Frequency Distribution
Statistics
Probability
Cuboid