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Frank Greer, a pediatrician at the University of Wisconsin in Madison, said the ideal way to achieve the goal of healthy bones is to make sure children exercise and consume up to ______ milligrams a day of calcium.

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A,C00

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Frank Greer, a pediatrician at the University of Wisconsin in Madison, said the ideal way to achieve the goal of healthy bones is to make sure children exercise and consume up to ______ milligrams a day of calcium. 您的浏览器不支持 audio 元素。