一、单元分析公路是孩子们所熟悉的。当孩子们走出家门或走出校园,他们就接触到了公路。随着他们生活经验圈和视野的不断扩大,盘山公路、修建公路的材料、公路上的桥梁、自行车以及公路上川流不息的车流,都将成为孩子们研究的对象。孩子们虽然对公路有着丰富的体验,但是公路是怎样修建的? First, the unit analysis Highway is familiar to children. When children get out of their home or out of school, they come into contact with the road. As their living experience and vision continue to expand, the Panshan Highway, the materials used to construct the roads, the bridges on the roads, the bicycles and the steady flow of traffic on the roads will all become the targets of the children’s studies. Although children have a wealth of experience on the road, but how to build the highway?