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

游客2024-09-26  12

问题 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.

选项 A、and
B、or
C、but
D、as

答案 D

解析 固定搭配题。not so much…as表示“与其说是……还不如说是”,故D正确。
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