在桌面上放置4个半径为2的小球,用半球形的碗严密的盖住,问碗的最小半径?请严谨说明原因 知乎 Template




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tomski在桌面上放置4个半径为2的小球,用半球形的碗严密的盖住,问碗的最小半径?请严谨说明原因 知乎 coloring