The car is too expensive. He can't afford____ (pay) for it.
如图,将矩形ABCD绕点A顺时针旋转90o后,得到矩形AB’C’D’,若CD=8,AD=6,连接CC’,那么CC’的长是( )
画出图形的另一半,使它成为一个轴对称图形.
如图是光源S经平面镜反射的两条光线,请画图确定光源位置,并完成光路图.