最佳答案
The United States in the North Central and North America also includes the territory of Alaska and the Pacific northwest of the Hawaiian Islands in Central. North and the Canadian border, south through the Gulf of Mexico, west Pacific, East Bin Atlantic. Coastline of 22,680 kilometers. Most areas of continental climate, the southern subtropical climate. Big temperature difference between north-central plains。 美国位于北美洲中部，国土还包含北美洲西北部的阿拉斯加跟平静洋中部的夏威夷群岛。北与加拿大年夜交界，南靠墨西哥湾，西临平静洋，东濒大年夜西洋。海岸线22680公里。大年夜部分地区属于大年夜陆性景象，南下属亚热带景象。中北部平原温差很大年夜。