轨迹一直以来是解析几何的热点,也是考查学生应用知识能力的有效内容之一,但一旦轨迹与立体几何交汇起来,就使原本平平淡淡的问题变得生机盎然,丰富多彩了,也使几何问题得以回归,得以融合了,下面就立体几何中的“轨迹问题”作个引探,以期抛砖引玉. The trajectory has always been a hotspot of analytical geometry, and it is also one of the effective contents of the ability to examine students’ application knowledge. However, once the trajectory intersects with the three-dimensional geometry, the problem of the original mundane light is full of vitality, rich and colorful, and also makes geometric problems. To be able to return, to be integrated, the following on the “geometry problem” in the three-dimensional geometry to make a probe, with a view to throwing bricks cited jade.