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世界人口问题 医疗卫生事业的发展使得人口出生率和成活率迅速提高,死亡率大幅度下降,引起全球人口急剧增长。世界人口递增的时间越来越短。工业革命时期18xx年到1839年,世界人口由10亿增加到20亿,到1960年为30亿,1975年为40亿,1987年7月为50亿。
和谐的人口 中国的人口问题和环境问题几乎是同时被人们重视起来的。人们将中国人口数量过多作为环境恶化的根本原因,将人口与环境对立起来,使很多人认为,要想从根本上解决中国的环境问题,就应该努力地削减中国的人口。
Population Burden many countries will experience aging populations in the next century because of declining birth and mortality rates. china will soon join their ranks.
Population expansion population expansion is one of the most serious problems in the world. with better hygienic conditions and better medical care, fewer babies die today. but the birth rate remains unchanged.
人口爆炸时代 我生活的时代是一个人非常多的痛苦时代。昨天,我的好友来找我玩,可找了大半天也找不到我,为什么?因为我家兄弟太多了,我是133大,而且样子和我差不多的就有40人!
人口控制 progress in science and the improvement of living conditions have led to the rapid growth of the world population. modern medicine, for example, has made it possible for babies to grow up healthily and for people to
人口问题 nowadays,population as well as environment has become a very important problem.with the development of china ,the population is growing faster and faster,though,chinese government has put forward strageties, such as
计划生育好 我国是人口大国,上一次人口调查人口在13亿左右,是世界上人口最多的国家,人口总数的三人之一。我国地大物博、石油、陆地、矿产资源应有尽有。我国资源多,人口也多,资源总会有用没的时候,可是人总要繁衍生息。