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蜗牛壳模型
Author:
孟宝兴
GeoGebra
New Resources
三位數除以一位數（一）
兩位數加法
球體建築師
球体的体积推导
柱體建築師
Discover Resources
三角柱算體積
餘弦的定理
reflectional symmetry_1
Locus (Two points 1)
正四面體碎形
Discover Topics
Continuity
Median Line
Straight Lines
Statistical Characteristics
Trigonometry