如右图所示,在大门两侧围墙的里面有两个固定的摄像头(高度低于围墙)。请问:如果墙外站着6个人,那么哪几个人能够被摄像头拍到?也许有的同学会认为,对于围墙外的情况摄像头应该是一览无余的,更何况有两个摄像头呢!事实真的如此吗?这里要注意的是,这两个摄像头都装在围墙里面,而且位置比围墙低,再加上摄像头是固定不动的,因此 As shown on the right, there are two fixed cameras (less than the enclosure) inside the enclosure on each side of the gate. Excuse me: If there are 6 people outside the wall, which few people can be photographed by the camera? Maybe some students will think that for the situation outside the wall camera should be sweeping, not to mention two cameras it! So? It should be noted here that these two cameras are mounted inside the fence, and the location lower than the wall, coupled with the camera is stationary, so