根据图中所示的光线传播情况，在适当位置上放一平面镜．
先作出反射光线、入射光线的角平分线，即为法线，镜面应过反射点与法线垂直，如图：
— What are they doing?
— ___________________[ ]
A. They are singing.
B. This is Jenny's family.
C. She is standing.
养老保险视同缴费年限包括哪些？
