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

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

The chief reason for the population growth isn’tso much a rise in birth rates ________ a fall in death rates as a result ofimprovements in medical care.

A．and

B．as

C．but

D．or

 

试题答案

【答案】

B

【解析】略

 

标签：soisngrowthinrise

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