一、前言美国三面环海,北面有五大湖,海岸线的长度约22000多公里,湖岸线的长度约17500公里。全国有34个州属沿海州。美国海岸以沙质海岸为主,沿岸沙岛——泻湖构成东海岸南段和得克萨斯州海岸的鲜明特征,东海岸北段属狭湾型海岸,为 I. Introduction The United States is surrounded by the sea on three sides with the Great Lakes in the north. The length of the coastline is about 22,000 kilometers and the length of the coastline is about 17,500 kilometers. There are 34 states in the country along the coast. The coast of the United States is dominated by the sandy coast. Sand Island - Lagoon is a distinctive feature of the southern coast of the East Coast and the coast of Texas. The northern coast of the East Coast is a narrow bay coast