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    The main reason for the population growth isn’t so much a rise in birth rates a fall in death rates as a of improvements in medical care. A. and; difference B. as; consequence C. but; result D. or; cause 【查看更多】

     

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    The main reason for the population growth isn’t so much a rise in birth rates _______a fall in death rates as a ___ of improvements in medical care.

        A. and; difference       B. as; consequence       C. but; result        D. or; cause

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