四川省德阳市2015
高考英语阅读理解练习（3）及答案 阅读理解 prolonging human life has increased the size of the human population. many people alive today would have died of childhood diseases if they had been born 100 years ago. because more people live longer, there are more people around at any given time. in fact, it is a decrease in death rates, not an in
