井邊有容量5公升跟3公升的兩個水桶,737Please respect copyright.PENANAEzP2BKYGG6
該如何利用這兩個水桶,裝出剛好4公升的水呢?737Please respect copyright.PENANAEbT4cWVqJM
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井邊有容量5公升跟3公升的兩個水桶,737Please respect copyright.PENANAEzP2BKYGG6
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該如何利用這兩個水桶,裝出剛好4公升的水呢?737Please respect copyright.PENANAEbT4cWVqJM
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737Please respect copyright.PENANA9oqxZ4OBvh
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