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MGSM / 卢克正在沙滩上建沙堡。他最后注意到,沙堡每一层的面积都是下一层面积的一半。如果他建了一座 4 层沙堡,其中顶层的面积为 16,则一层的平均面积是多少?

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卢克正在沙滩上建沙堡。他最后注意到,沙堡每一层的面积都是下一层面积的一半。如果他建了一座 4 层沙堡,其中顶层的面积为 16,则一层的平均面积是多少?

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