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时间轴--大人物
Author:
浅蓝色
GeoGebra
New Resources
常见四边形是否是双心四边形
第三周作业效果演示
平行線的判定
撒针估算面积实验
活动三：应用性质
Discover Resources
proof 49 黃彥淇
Rolling Circle
练习及小结
尝试绘本
拋物線(左右型)標準式
Discover Topics
Calculus
Vectors 2D (Two-Dimensional)
Differential Calculus
Polygons
Orthocenter