在高级中学物理课本(甲种本)第一册第二章第十二节《竖直上抛运动》中谈到:“由于上升运动和下降运动的加速度矢量大小是相同的,我们也可以把竖直上抛运动看做是一个统一的匀变速运动(以下简称”统一运动“),而上升运动和下降运动不过是这个统一运动的两个分过程。”这是合理的。由于学生知识准备不足,在这 In the second chapter of the second edition of High School Physics Textbook (A kind of book), Chapter 12, “The Vertical Throw Motion”: “Because the magnitude of the acceleration vector is the same for the ascending motion and the descending motion, we can also The vertical throwing movement is regarded as a uniform uniform variable speed movement (hereinafter referred to as ”unified movement“), and the ascending and descending movements are just two sub-processes of this unified movement.” This is reasonable. Due to lack of student knowledge preparation, here