The population decreased from 1840s until about 1970, largely because of _______.
A.a low birth rate
B.a high death rate
C.a low employment rate
D.a high emigration rate
正确答案是D
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明:本文由翰林刷题小程序授权发布,如需转载请注明出处。