美国概况练习题：1 The traditional dividing line in America between “east” and “west” is_.2 The earliest part in America to be found and taken over by early settlers is _.3 The largest racial group in the whole population of U.S.A is_.4 Before 2000, the largest minority group in the United States is_.5 _has the worlds oldest written constitution and political party.6 The economic problem caused by the depression in 1929 was eventually solved by_.7 In the United States, primary
