桥是人类克服江河阻隔的产物。有了桥 ,人在大地上就能通行无阻了。所以桥可以说是道路的衔接与延伸。人常说 ,我走过的桥比你走过的路还多呢。看是一句大话 ,但也正好说出了桥与路的关系。最早的桥是什么时候出现的 ?据建筑学家考证 ,我国最早的桥建于商代 ,距今约三千五百年 Bridge is the product of human barriers to overcome the rivers. With the bridge, people will be able to gain access to the earth. Therefore, the bridge can be said that the convergence and extension of the road. People often say that the bridge I walked was more than the one you walked through. See is a big talk, but also just that the relationship between the bridge and the road. When is the earliest bridge appears? According to architectural research, our country’s oldest bridge was built in the Shang dynasty, dating back about 3,500 years