井邊有容量5公升跟3公升的兩個水桶,509Please respect copyright.PENANAc5gXEguucC
該如何利用這兩個水桶,裝出剛好4公升的水呢?509Please respect copyright.PENANAWGCqbTYbRJ
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井邊有容量5公升跟3公升的兩個水桶,509Please respect copyright.PENANAc5gXEguucC
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該如何利用這兩個水桶,裝出剛好4公升的水呢?509Please respect copyright.PENANAWGCqbTYbRJ
8964 copyright protection505PENANAXu4dM8NV62 維尼
509Please respect copyright.PENANAQOjLwaYpzi
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