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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.
We can see from the available statistics that______.
选项 A、California was once the most thinly populated area in the whole U. S.
B、the top 10 states in growth rate of population were all located in the West
C、cities with better climates benefited unanimously from migration
D、Arizona ranked second of all states in its growth rate of population
答案D
解析 本题可参照文章的第8段和第9段。从中可知，据报道，从区域上来看，落基山脉地区各州成为人口增长最快的地方。从各州的情况来看，内华达州和亚利桑那州的人口增长速度最快——分别为63．5％和53．1％。除了佛罗里达州和得克萨斯州以外，人口增长率排名前十位的都位于西部。据此可知，内华达州的人口增长速度最快，亚利桑那州的人口增长速度第二。D项与文中的意思相符，因此D项为正确答案。
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