Mexico and the USA share a common border on the northern side of Mexico. However, despite the close physical proximity(临近), there are a lot of differences between their social conduct.Americans belong to diverse ethnic (种族) as well as national origins, despite which, all of them have mixed perfectly with the mainstream of American culture. Officially, six different races of people have been recognized by the government of the United States, which include White or European Americans, American Indians and Alaska Natives, Native Hawaiians and other Pacific Islanders, Black or African-Amer