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S4E14 圣诞树
Author:
宋晓燕
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數（二）
算柱 (兩位數)
四邊形的特性
第八周作业
Discover Resources
Conjecture (Tropical Hoehn's Conjecture)
切割線性質
數列
圓方程式
mjnsl8ba, 數列級數圖形3
Discover Topics
Function Graph
Solids or 3D Shapes
Normal Distribution
Derivative
Difference and Slope