A:This is my face.
B:This is my ear.
(1+i)20-(1-i)20的值是( )
If you have any trouble, you can call me for help at any time.
请按照要求画图:
①在甲图中,画出入射光线AO经平面镜后的反射光线;
②在乙图中,利用平面镜成像特点画出图中物体AB在平面镜中所成的像;
③在丙图中,画出BC的入射光线和AO的折射光线.