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  3. We can begin our discussion of“populationas global issue”with what most persons mean when they discuss“the population problem”：t

We can begin our discussion of“populationas global issue”with what most persons mean when they discuss“the population problem”：t

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问题 We can begin our discussion of“populationas global issue”with what most persons mean when they discuss“the population problem”：too many people on earth and a too rapid increase in the number added each year．The facts are not in dispute．It was quite right to employ the analogy that linked demographic growth to  “a long，thin powder fuse that burns steadily and haltingly untilit finally reaches the charge and explodes．”
    To understand the current situation，which is characterized by rapid increases in population，it is necessary to understand the history of populationtrends．Rapid growth is a comparatively recentphenomenon．Looking back at 8,000 years of demographic history，we find that populations have been virtually stable or growing very slightly for most of human history．For most of our ancestors，life was hard，often nasty，and very short．There was high fertility in most places，but this was usually balanced by high morality．For most of human history，it was seldom the case that one in ten persons would live past forty，while infancy and childhood were especially risky periods．Often，societies were in clear danger of extinction because death rates could extend their birth rates．Thus，the population problem throughout most of history was how to prevent extinction of the human race．
  This pattern is important to notice．Not only does it put the current problem of demographic growth into a historical perspective，but it suggests that the cause of rapid increase in population in recent years is not a sudden enthusiasm for more children，but an improvement in the conditions that traditionally have caused high mortality．
  Demographic history can be divided into two major periods：a time of long，slow growth which extended from about 8000 B
Which statement is true about populationin crease?
选项 A、There might be an increase of 2．2 billionpersons from now to the year 2000．
B、About 50，000 babies are born every six hours at present．
C、Between 8000 BC and the present，the population increase is about 80，000，000 person severy year.
D、The population increased faster between8000 BC and 1 650 than between 1 650 and the present．
答案A
解析 四个选项都是关于人口增长的数字，可定位至文章最后一段，根据Between 1650 and the present,the population has increased from 500 million to more than 4 billion．And it is estimated that by the year2000 there will be 6．2 billion people throughout the world．由此可知，目前人口为40亿，到2000年估计可以达到62亿，相比之下增加了22亿，即2．2 billion。故A项正确。故本题选A。
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