对学生的空间想像能力的考查,新考纲提出了更高要求“能够想象几何图形的运动和变化情况”,因此空间图形中求动点轨迹的一类题型便应运而生.由于正方体是空间图形中较简单但又十分重要的几何体,以正方体为背景的轨迹问题更受命题者的青睐.这类问题考查的知识并不是很难,但提法? The examination of students’ spatial imagination, the new syllabus proposes a higher demand “to be able to imagine the movement and change of geometry”, and therefore a type of question for the trajectory of the movement point in the space graph emerges. Since the cube is a space In the graphic, the simpler but very important geometry, the trajectory problem with the cube as the background is more favored by propositioners. The knowledge of such questions is not difficult, but the reference?