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  3. Emerging from the 1980 census is the picture of a nation developing more and more regional competition, as population growth in

Emerging from the 1980 census is the picture of a nation developing more and more regional competition, as population growth in

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问题     Emerging from the 1980 census is the picture of a nation developing more and more regional competition, as population growth in the Northeast and Midwest reaches a near standstill.
    This development—and its strong implications for U. S. politics and economy in years ahead—has enthroned the South as America’s most densely populated region for the first time in the history of the nation’s head counting.
    Altogether, the U. S. population rose in the 1970s by 23. 2 million people—numerically the third largest growth ever recorded in a single decade. Even so, that gain adds up to only 11. 4 percent, lowest in American annual records except for the Depression years.
    Americans have been migrating south and west in larger number since World War II, and the pattern still prevails.
    Three sun belt states—Florida, Texas and California—together had nearly 10 million more people in 1980 than a decade earlier. Among large cities, San Diego moved from 14th to 8th and San Antonio from 15th to 10th—with Cleveland and Washington D. C. , dropping out of the top 10.
    Not all that shift can be attributed to the movement out of the snow belt, census officials say, nonstop waves of immigrants played a role, too—and so did bigger crops of babies as yesterday’s "baby boom" generation reached its child bearing years.
    Moreover, demographers see the continuing shift south and west as joined by a related but newer phenomenon: more and more Americans apparently are looking not just for places with more jobs but with fewer people, too. Some instances:
    Regionally, the Rocky mountain states reported the most rapid growth rate—37. 1 percent since 1970 in a vast area with only 5 percent of the U.S. population.
    Among states, Nevada and Arizona grew fastest of all: 63. 5 and 53. 1 percent respectively. Except from Florida and Texas, the top 10 in rate of growth are composed of Western states with 7. 5 million people—about 9 per square mile.
    The flight from overcrowdedness affects the migration from snow belt to more bear-able climates.
    Nowhere do 1980 census statistics dramatize more the American search for spacious living than in the Far West. There, California added 3. 7 million to its population in the 1970s, more than any other state.
    In that decade, however, large numbers also migrated from California, mostly to other parts of the West. Often they chose—and still are choosing—somewhat colder climates such as Oregon, Idaho and Alaska in order to escape smog, crime and other plagues of urbanization in the Golden State.
    As a result, California’s growth rate dropped during the 1970s, to 18. 5 percent—little more than two thirds the 1960s growth figure and considerably below that of other Western states.
It can be inferred from the passage that______.
选项 A、at present, most Americans migrate south and west
B、few people left the Golden state California in 1970s
C、the population in America increased 10 million more in 1980 than a decade earlier
D、American people don’t like living in a city with cold climate
答案A
解析 据本文第4段可知，“自从第二次世界大战以来，美国人口一直大幅度向南方和西部地区迁移，到目前为止，这一趋势仍然不减”，目前美国人还是向南部和西部迁移，因此选A项。
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