一条光线在物体表面上�生反射反射光线与入射光线垂直则 A.入射角为45°b.入射角为90°c.反射角为90°d.入射光线垂直物体表面 Template




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tomski一条光线在物体表面上�生反射反射光线与入射光线垂直则 a.入射角为45°b.入射角为90°c.反射角为90°d.入射光线垂直物体表面 coloring