[填空题]

In the 20th decennial U. S. census, taken in 1980, the resident population in the United States numbered 226, 547,346. About 188.3 million (83.2%) were classified as white, 26.5 million (11.7%) as black, ll.7 million (5.1%) as members of other races.
The history of the United States is really the story of various immigrants groups working together to build a unique nation. During the 1500s, French and Spanish explorers visited the New World. But the first Europeans who came to stay were mostly the English. In 1790, when the first U. S. census was taken, the white population of the 13 original states totaled slightly more than 3 million. About 75 percent of these first Americans were of British ancestry; the rest were German, Dutch, French, Swiss, and Spanish. The English gave the new nation its language, its laws and its philosophy of government
The composition of the American population:
Census of 1980: the number of the United States is (46) .
Ab

[填空题]

 

In the 20th decennial U. S. census, taken in 1980, the resident population in the United States numbered 226, 547,346. About 188.3 million (83.2%) were classified as white, 26.5 million (11.7%) as black, ll.7 million (5.1%) as members of other races.
The history of the United States is really the story of various immigrants groups working together to build a unique nation. During the 1500s, French and Spanish explorers visited the New World. But the first Europeans who came to stay were mostly the English. In 1790, when the first U. S. census was taken, the white population of the 13 original states totaled slightly more than 3 million. About 75 percent of these first Americans were of British ancestry; the rest were German, Dutch, French, Swiss, and Spanish. The English gave the new nation its language, its laws and its philosophy of government
The composition of the American population:
Census of 1980: the number of the United States is (4

[单项选择]The government requires that a census be taken every five years so that accurate statistics may be ______ .
A. composed
B. complemented
C. completed
D. compiled

[单项选择]If an occupation census had been taken in the eleventh century，it would probably have revealed that quite 90%of the people were country dwellers who drew their livelihood from farming，herding，fishing，or the forest．An air photograph taken at that time would have revealed a sprinkling of villages，linked together by un—surfaced roads and more than 10，000 persons．A second picture，taken in the mid—fourteenth century would show that the villages had grown larger，more numerous，and also more widespread，for Europeans had pushed their frontier outward by clearing，draining，and settling new areas．There would be more people on the road，rivers and seas，carrying food or raw materials to towns which had increased in number，size and importance． But a photograph taken about 1450 would reveal that little further expansion had taken place during the preceding hundred years．
Any attempt to describe the countryside during those centuries is beset by two difficulties．In the first place we have to exam
A. misleading
B. faultless
C. contradictory
D. oversimplified