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平行1
Author:
Hui Sir
GeoGebra
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【案例】2018年全国1卷理科12题
畫出對稱圖形
四邉形 (四年級) 教師版
判斷球體
兩位數除以一位數（二）
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方格紙上畫正方形2
根據百分率找數量（一）: 例3
方向餘弦
ｃｉｒｃｌｅ ｓｅｇｍｅｎｔ３
初中动点问题的制作方法-单位向量法
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Translation
Confidence Interval
Vectors
Linear Regression
General Quadrilateral