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  3. It will come as no surprise that the earth is going to be a much more crowded place in the next century. From a global populatio

It will come as no surprise that the earth is going to be a much more crowded place in the next century. From a global populatio

admin2010-09-10  47
问题     It will come as no surprise that the earth is going to be a much more crowded place in the next century. From a global population of about 5. 4 billion today, the United Nations Fund for Population Activities says we’ II see a rise to 8. 2 billion people in 2025. The U. N. expects the total population to stabilize (稳定) at Il. 6 billion sometime later in the 2000 s.
    More than ninety percent of the population growth will occur in developing countries. Eighteen of the world’ s twenty largest cities will be in these lands as the number of urban-dwellers (城市居民) swells from roughly two billion to 5.1 billion. The Unites States and Europe, which in 1950 accounted for twenty-two percent of the world’ s population, will be home to less than nine percent of its people in 2025. By contrast, Africa’ s share of the total will climb from nine percent in 1950 to nearly twenty percent by 2015. Ethiopia should double in size to almost 100 million people. In about the same time period, India will overtake China as the world’ s most populous country.
    For the United States, the big news won’ t be an abundance of new faces; experts predict the country will grow from its present 250 million population and stabilize at about 350 million sometime before the middle of the 21st century. The important changes will be in American ethnic (种族的) makeup. Twenty years from now, the United States white, non-Hispanic majority will peak at 195 million, and then may decline in numbers. Asian-Americans will become an increasingly important minority, while African-Americans--whose population growth rate is slowing dramatically--will become the second-largest minority behind Hispanics, a half million of whom are now thought to be emigrating to the United States legally and otherwise, each year.
Today people in the US account for about ______ percent of the global population.
选项 A、9
B、4.6
C、22
D、6. 5
答案B
解析 细节题。考生需要经过定位和计算才能得出答案。首先应该分别对现在美国和世界的人口进行定位，它们分别位于第一段第二句From a global population of about 5.4billion today和第三段第一句experts predict the country will grow from its present 250 million population，经过简单的除法计算可知答案为B。
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