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dragon(龙)
Author:
赵林
GeoGebra
New Resources
異分母分數減法
算柱 (兩位數)
【案例】2018年全国1卷理科12题
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
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由拉線80303林心怡
圓與正三角形上動點連線上中點的軌跡
串珠(大小不同)
Copy of 信心水準與信賴區間
二项式定理
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Hypergeometric Distribution
Pie Chart or Circle Chart
Orthocenter
Cube
Frequency Distribution