填空题

The______refers to the average number of children women will bear in their lifetime.

【参考答案】

total fertility rate (or TFR)
<上一题 目录 下一题>
热门 试题

填空题
Immigration now accounts for about______of the annual U.S. increase in population.
填空题
The South and West have experienced a continuous loss of population to the North.
相关试题