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三角函数值
Author:
谭伟
GeoGebra
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判斷球體
算柱 (兩位數)
拼砌四邊形
四邉形 (四年級) 教師版
【案例】2018年全国1卷理科12题
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图形
比例
兩位數除法
選修數學
弦心距
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Scalene Triangles
Probability
Differential Calculus
Correlation
Real Numbers