600本金不倒翁倍投法带图

简介：There were originally only two cafeterias in No. 2 Middle School. Due to the enrollment of freshmen from Su Can and others in No. 2 Middle School, the school population increased sharply. School leaders could only start to expand the cafeteria during the summer vacation. Otherwise, you would still want students from three grades. They all flocked to a canteen.