井邊有容量5公升跟3公升的兩個水桶,472Please respect copyright.PENANA4xQpEUGFAN
該如何利用這兩個水桶,裝出剛好4公升的水呢?472Please respect copyright.PENANAT3qVi4TNHZ
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井邊有容量5公升跟3公升的兩個水桶,472Please respect copyright.PENANA4xQpEUGFAN
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該如何利用這兩個水桶,裝出剛好4公升的水呢?472Please respect copyright.PENANAT3qVi4TNHZ
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472Please respect copyright.PENANAFJ85UdD2TI
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