天津是中国北方重要的经济中心和最大的“水旱码头”，海上运输和陆路交通十分发达，具有很强的对内、对外辐射功能。在中国民用航空发展史上，尤其是在新中国民航建立之初，天津有着非常重要的影响力，发挥了举足轻重的作用。（一）中国第一条民用航空线第一次世界大战后，各? Tianjin is an important economic center in northern China and the largest “drought and wharf”. Its maritime transport and land transportation are well developed and have strong internal and external radiation functions. In the history of China’s civil aviation development, especially at the founding of New China Civil Aviation, Tianjin had a very significant influence and played a pivotal role. (A) China’s first civil aviation line After the First World War, each?