精选优质文档-倾情为你奉上第二节分类突破一、原文词汇类(2017江苏)Population ChangeWhy is the worlds population growing？The answer is not what you might think.The reason for the explosion is not that people have been reproducing like rabbits，but that people have stopped dropping dead like flies.In 1900，people died at the average age of 30.By 2000 the average age was 65.But while increasing health was a typical feature of the 20th century，declining birth rate could be a defining one of the 21st.Statistics
