井邊有容量5公升跟3公升的兩個水桶,855Please respect copyright.PENANA4F2CA9sblf
該如何利用這兩個水桶,裝出剛好4公升的水呢?855Please respect copyright.PENANAPdYaIOlKBu
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井邊有容量5公升跟3公升的兩個水桶,855Please respect copyright.PENANA4F2CA9sblf
1234 copyright protection851PENANAqC52hWLM7h 尼
該如何利用這兩個水桶,裝出剛好4公升的水呢?855Please respect copyright.PENANAPdYaIOlKBu
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855Please respect copyright.PENANAXK12VXCx62
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216.73.216.69
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