周末,江南中学吴晓宇、贾波特和刘一休三位同学一起从郊外野炊归来。回来的路上,他们坐在大巴车上,留恋地看着窗外的景色。好动的刘一休,屁股上似乎被扎了针,扭来扭去,不时看看这儿,动动那儿。突然,他眼珠一转,诡秘地对着吴晓宇和贾波特一笑:“我们这次旅行,选用最快最好的交通工具是汽车,其次是骑自行车,然后是步行。还是有车轮子好啊!我们回去一起上网,探讨一下‘车轮’的前世今生吧!就权当是一个课外实践活动。” Weekend, Jiangnan Middle School Wu Xiaoyu, Jia Bote and Liu Yixiu three students returned from a picnic in the suburbs. On the way back, they sat in the bus, nostalgia looked at the scenery outside the window. Reluctant Liu a break, buttocks seems to be tied needle, twisting, from time to time to see here, move there. Suddenly, he turned his eyes, secretly facing Wu Xiaoyu and Jia Boer smile: "This time we travel, choose the fastest and best means of transport is the car, followed by riding a bike, then walking. Well, let’s go back online and explore the past and present of Wheel, which is an extracurricular practice.