曾和一位同事在一起探讨过这样一件事一件在上体育课的过程中他与学生发生的非常不愉快的事情:一位平时不喜欢上体育课的学生在上双杠支撑摆动成分腿坐杠上前进时,把裤裆给撕坏了,学生感觉很没面子,与老师发生了争执,结果在放学后老师发现自己的自行车气门芯不见了…… He and a colleague have discussed such a thing in the course of a physical education class that he and the student had a very unpleasant thing: a student who does not like to take a physical education class on the parallel bars supporting the swinging component legs to sit As the bar moved forward, the crotch was torn off. The student felt very unfamiliar and had a dispute with the teacher. As a result, the teacher found his bicycle valve core was gone after school...