A、south
B、north
C、east
D、west
European in the 15th century have long been known as Indians because 【M2】______
of the belief prevalent at time of Columbus that the Americas were the 【M3】______
outer reaches of the Indies. Most scholars agree that Native Americans
came into the Western Hemisphere from Asia by the Bering Strait in a 【M4】______
series of migrations. From Alaska they spread to the east and south. 【M5】______
Several separate waves of migration are said to count for the many native 【M6】______
linguistic families, while the common origin used to explain the physical 【M7】______
characteristics that Native Americans have in common--Mongoloid
features, coarse, straight, black hair, dark eyes, sparse body hair, and
a skin colour range from yellow-brown to reddish brown. Many scholars 【M8】______
accept evidence of Native American existence in the Americas back more
than 25,000 years. In pre-Columbian times the Native American
population of the area north of Mexico is estimated to be between one and 【M9】______
two million. From prehistoric times until recent historic times there were
roughly about six major cultural areas, excluding that of the Arctic i. e. ,【M10】______
Northwest Coast, Plains, Plateau, Eastern Woodlands, and Southwest.
Information about particular groups can be found in separate articles and in
separate biographies and subject articles.
【M1】
A、serial model
B、race model
C、resonance model
D、parallel model
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