The chief reason for the population growth isn’t so much a rise in birth rates ________ a fall in de

题目简介

The chief reason for the population growth isn’t so much a rise in birth rates ________ a fall in de

题目详情


The chief reason for the population growth isn’t so much a rise in birth rates ________ a fall in death rates as a result of improvements in medical care.
A.and B.asC.butD.or
题型:单选题难度:偏易来源:不详

答案

B

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