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一、歌诀法我把第一个框题“世界面积最大的国家”编为:海岸长——东、北、西三面分别濒临太平洋、北冰洋、大西洋的12个边缘海,海岸总线长约4万千米。邻国多——南面和西面同14个国家接壤。纬度高——大部分地区位于北半球的中高纬度(40°N～70°N)经度广——跨经度170°(20°E～170°W)。跨两洲——地跨欧、亚两洲。面积大——面积1700多万平方千米,居世界首位。人口多——约有1.5亿人,居世界第六位。多民族——境内有100多个民族。
First, song and dance method I put the first box title “The country with the largest area in the world” as: Coast leader - East, North, West, respectively, bordering the Pacific Ocean, the Arctic Ocean, the Atlantic Ocean, 12 fringe sea, coastal bus length 4 thousand kilometers. Many neighboring countries - the south and the west border with 14 countries. Latitude is high - most of the area is located in the mid-high latitudes of the Northern Hemisphere (40°N～70°N) longitude – 170° (20°E～170°W) across longitude. Across two continents - across Europe and Asia. Large area - more than 17 million square kilometers, ranking first in the world. It has a large population - about 150 million people, ranking sixth in the world. Multi-ethnic - There are more than 100 nationalities in the territory.