PART TWO The United States of American
1.Population, race and ethnic groups 人口和种族
1)introduction 概要
the third most populous country in the world,with 255.5 million people.
a nation of immigrants.Immigration accounts for a major source of population
growth.There are many racial and ethnic groups. Between 80% and 90% of immigration ot the United States now is from Asian and Hispanic counties.The first immigrants in American history came from England and Netherlands. Population movements are common ...