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光的反射
Author:
樊双平
GeoGebra
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三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
找出對稱軸
異分母分數減法
兩位數除以一位數（二）
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Clock
畢氏定理的證明(三移動)
複合圖形表面積(一)
F2_Ch11.1_三角學(對鄰斜)
翰林卷第10题
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Symmetry
Linear Functions
Hypothesis Testing
Optimization Problems
Surface