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变化率问题
Author:
杨晓晨
GeoGebra
New Resources
垂直線的斜率
第八周作业1
撒针估算面积实验
活动三：应用性质
祖冲之的期望：内棋与外棋
Discover Resources
扣球路徑求直線方程式
concyclic by Mr LO WY
周界-平移法(練習三)
圓錐曲線Conic Section
对角线交点
Discover Topics
Variance
Real Numbers
Kite
Set Theory
Parabola