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chen mingchuan
GeoGebra
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【案例】2013年安徽高考15题
拼砌四邊形
找出對稱軸
兩組對邊相等的四邊形
兩組對邊相等和有直角的四邊形
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滑桿ｋ控制ｋ_1,k_2,k_3三數值
Rounding Quiz (Combined) 小數位及有效數字：同步測驗
香港貨幣
畢氏定理證明（Ｉ）
連連看！橢圓在哪裡？
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Probability
Differential Calculus
Arithmetic Operations
Linear Functions
Linear Regression