如图所示，S′为发光点S在平面镜MN中的像，若S发出的一条光线SO经平面镜反射后过P点，请在图中找出发光点S的位置，并完成光路．

​

    Do you know what the White House is? Perhaps some of you do，while others don't.

    The White House is a house in Washington. The president of the U.S.A. lives in it. It's really white. But do you know why the White House is white? The story happened in 1812. That year England was at war with America. The British army got to Washington and set the president's house on fire. In 1814，in order to hide the marks of the fire，the stone walls of the president's house were painted white and it has been the “White House” ever since.

依据“站得高看得远”的道理，我们应站在什么地方才能看的最远              （    ） 

在地图大小相同的情况下，比例尺越大，图上表示的（　　）