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乘法计时训练
Author:
孟宝兴
Topic:
Multiplication
GeoGebra
New Resources
兩位數加法
讀磅
圓周公式的應用
球体的体积推导（优化版）
圓的切線方程
Discover Resources
扇形動畫
三角排列
雙曲線3--等軸法
钟表制作成功啦
椭圆的参数方程的副本
Discover Topics
Pythagoras or Pythagorean Theorem
Secant Line or Secant
Coordinates
Straight Lines
Polygons