题目

（贵州省兴义市第九中学2010届高三第一次月考） A It doesn’t matter when or how much a person sleeps, but everyone needs some rest to stay alive. That’s what all doctors thought, until they heard about Al Herpin. Al Herpin, it was said, never slept. Could this be true? The doctors decided to see this strange man themselves. Al Herpin was 90 years old when the doctors came to his home in New Jersey. They thought for sure that he got some sleep of some kind. So they stayed with him and watched every movement he made. But they were surprised. Though they watched him hou如果某地人口出生率为1.6%，死亡率为0.4%，其人口自然增长率为（　　）A. 20% B. 1.2% C. 1% D. 0.2%