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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 for Florida and Texas, the top 10 in rate of growth is composed of Western states with 7.5 million people-about 9 per square mile.
    The flight from over crowdedness affects the migration from snow belt to more bearable 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.
The census distinguished itself from previous studies on population movement in that______.
选项 A、it stresses the climatic influence on population distribution
B、it highlights the contribution of continuous waves of immigrants
C、it reveals the Americans’ new pursuit of spacious living
D、it elaborates the delayed effects of yesterday’s "baby boom"
答案C
解析 从文章第6段的内容可知，人口普查官员说，并不是所有的迁移都是因为人们想搬出寒带地区；从第7段的内容可知，人口统计学家发现，向南部、西部地区的不断迁移还伴随着一种与此相关却又与从前不同的现象：愈来愈多的美国人明显不再只寻找有更多就业机会的地方，他们还在寻找人口较少的地区；从文章第11段的第1句话可知，1980年人口普查的数据戏剧性地显示，美国人主要是到西部地区寻找宽敞的生活空间。据此可知，如今的美国人注重的是宽敞的生活空间。C项与文章的意思相符，因此C项为正确答案。
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