If the percent increase in population from 1910 to 1920 had been approximately the same as the percent increase from 1900 to 191

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问题
If the percent increase in population from 1910 to 1920 had been approximately the same as the percent increase from 1900 to 1910, the 10-year increase, in millions, from 1910 to 1920, would have been approximately

选项 A、3
B、6
C、16
D、19
E、29

答案D

解析 标题:美国的人口(1890-1980年官方的统计结果)若1910年至1920年人口增长的百分数与1900至1910年人口增长的百分数相同,那么以百万为单位,从1910至1920年的十年期间人口大约会增长多少?
解:本题的正确答案为(D)。从人口数据表中可知,1900至1910年人口增长的百分比为:16/76×100%,若按照这个比率计算,1910至1920年人口的增长量为:92×16/76 =19.37
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