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testing2
Author:
iedc
GeoGebra
New Resources
第三周作业效果演示
第八周作业2
盈利與虧蝕
活动三：应用性质
百分數及其應用
Discover Resources
立體幾何
GGB10
滑杆的數字接力賽-平移旋轉三角形填滿四邊形(加邊框)
定积分的概念（移动端）的副本
滚动的四面体
Discover Topics
Probability
Interest Calculation
Differential Equation
Special Points
Linear Regression