井邊有容量5公升跟3公升的兩個水桶,723Please respect copyright.PENANACwgQn0H3be
該如何利用這兩個水桶,裝出剛好4公升的水呢?723Please respect copyright.PENANA2IBNEtdv5C
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井邊有容量5公升跟3公升的兩個水桶,723Please respect copyright.PENANACwgQn0H3be
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該如何利用這兩個水桶,裝出剛好4公升的水呢?723Please respect copyright.PENANA2IBNEtdv5C
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723Please respect copyright.PENANAbqWgk1zSh5
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