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中三科學（光學）Basic Optics
反射 Reflection of Light by Plane Mirror
平面鏡成像 Plane Mirror
折射及全內反射 Refraction & Total Internal Reflection
凸透鏡 Convex Lens
凹透鏡 Concave Lens
中三科學（光學）Basic Optics
Autor:
Alex CHIK
反射 Reflection of Light by Plane Mirror
平面鏡成像 Plane Mirror
折射及全內反射 Refraction & Total Internal Reflection
凸透鏡 Convex Lens
凹透鏡 Concave Lens
Sljedeće
反射 Reflection of Light by Plane Mirror
Novi radovi
祖冲之的期望：内棋与外棋
圓周公式的應用
直線的斜率
球体的体积推导（优化版）
三位數除以一位數（一）
Istraži uratke
some pic
畢氏定理的證明(三移動)
How to draw a heptagon with ruler andcomp…
二階行列式-平行四邊形的面積
全排列
Otkrij teme
Eksponencijalne funkcije
Trigonometrija
Kosinus
Težište
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