一、案例描述初中二年级26班的一节体育课,我刚做完投篮的示范动作,突然,一个纸飞机飞向篮板,并掉落在我的脚边,“哈哈哈”一阵哄笑声瞬时爆发了。我弯腰捡起纸飞机,平举起 First, the case description of the second grade junior high school 26 class section of a physical education class, I just finished shot demonstration, and suddenly, a paper plane flew to the rebound and fell on my feet, “ha ha ha ” burst of laughter The sound broke out instantly. I stooped to pick up the paper plane and raise it flatly