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难集 王 衍射 答案
Author:
沉蕊沁芳
GeoGebra
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【案例】2018年全国1卷理科12题
球体的体积推导
球体的体积推导（优化版）
漂亮的摇摆曲线
双心四边形
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Circle on a Sphere
認識函數
擴分
test
两平面夹角1
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Straight Lines
Percentages
Triangles
Correlation
Linear Equations