“丁零……”一阵上课预备铃声过后,喧闹的操场立刻安静下来,同学们兴趣未尽地收起了篮球、跳绳、毽子等向教室跑去。四年二三班的彭超正和同班的几个小球皮子孙铭、王大卫、李达等在玩篮球,听到铃 “Ding zero ... ” After a while preparing class ringtones, the noisy playground immediately quiet, students are not interested in putting away the basketball, skipping, shuttlecock and so on to run to the classroom. Peng Chao class four years two or three classmates with the same ball a few Sun Ming, David, Li Da, playing basketball, hear the bell