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1、Situation: The United States is situated in the central part of North America with its two youngest states: Alaska in the northwestern part of North America and Hawaii in the central Pacific. The country is bounded by Canada on the north and by Mexico and the Gulf of Mexico on the south with the Atlantic Ocean on the east and Pacific Ocean on the west.The total area of the country is 9,372,614 square kilometers. The total population is about 283,000,000(2001).The whole country includes 50 states and a federal district, the District of Columbia, which is the seat of the Federal Government。

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