Hello, I'm Jim. I'm in an English school. Our school starts at nine o'clock. It finishes at half past three. There are nine boys and ten girls in my class. We have our class rules: Don't be late. Don't sleep. We can listen carefully (仔细听) in class, and we try hard. So we all study hard. At break time(休息时间), we can play lots of games.
帛画 | 掠走 | 宝库 | 智慧 | 结晶 |
蜡烛油。请在图中用带箭头的线段画出热的传递过程和和方向,并且用1、2、3、4表示蜡烛油熔化的先后顺序。