【摘 要】
：
在人们为“人口爆炸”的危机而担忧时,人口学家却指出,从21世纪下半叶开始世界人口将呈迅速下降之势。这其中有什么奥秘呢?另外,当我们得知几个百年以后全世界的人口总数有可
论文部分内容阅读
在人们为“人口爆炸”的危机而担忧时,人口学家却指出,从21世纪下半叶开始世界人口将呈迅速下降之势。这其中有什么奥秘呢?另外,当我们得知几个百年以后全世界的人口总数有可能比现在的美国人口还少时,似乎不妨替后世的人们操操闲心,感觉一下是喜还是忧,抑或是既喜亦忧……
When people are concerned about the crisis of “population explosion,” demographers point out that the world population will decline rapidly from the second half of the 21st century. What is the secret of this? In addition, when we know that after a few centuries the total population of the world may be less than the present population in the United States, it seems as if we can enjoy the happiness of future generations, feel happy or worried, or Is both happy and sad ......
其他文献
In 1840, times were hard for BentleyHarcourt. He had a farm in Yorkshire,but it didn’t make money. He wanted tomarry, but decided to wait until bettertimes ca
破产制度是社会发展到一定程度的产物,是市场经济运行机制的必然选择。破产作为一种特殊诉讼程序,其产生和存在的根本原因在于商品经济和市场经济条件下的资源重新配置要求做
The ship was at the end of its long journey, and thepeople were looking over the side. They werewaiting to get off.A very rich woman in the ship was talking to
Jane Edwards wanted to know herfortune.She went to see an oldwoman who told people their fortune.Jane wanted to know her fortune becauseshe was not happy.She h
Oliver Langley,the manager of an office in Humbervale,lived in a house in Wilton Street,less than two milesfrom the office.He was therefore able to drive home
从事体育工作多年来,通过平时的业余训练,我发现短跑训练中协调放松能力的培养非常关键。难怪有人认为:“短跑的胜利,一定属于掌握了放松跑的人。”本文就协调放松能力的培养
曾在科索沃和东帝汶进行过艰苦的战事报道的获奖女记者认为妇女不需要使用特有的媚术也能成功地采访到一篇篇精彩的战争故事。
Winning female journalists who have had ha
在初中的各门学科中,化学是一门比较特殊的学科,因为在化学的教学中处处有实验,可以说实验贯穿了化学学习的所有阶段,所以实验的内容非常重要,需要教师精心安排,实验的形式也
The Japanese have one of the most advanced mass railroadsystems in the world.The Shinkansen,referred to as the BulletTrain,covers thousands of kilometers of tr
一、事故经过2016年6月26日5时54分,湖南省衡阳市骏达旅游客运有限公司(以下简称骏达公司)驾驶人刘大辉驾驶湘D94396号大客车从位于衡阳市蒸湘区阳辉村的家中出发,按照骏达公