People say that Vancouver is Canada's most beautiful city, ______by mountains and the Pacific Ocean.
A:surrounding
B:surrounded
C:being surrounded
D:is surrounded
如图所示,小聪通过一平面镜看到小猫要偷吃小鱼.图中画出了一条光的传播路径.请你完成该路径的光路图.
横行相加得____,竖行相加得 ____。