井邊有容量5公升跟3公升的兩個水桶,736Please respect copyright.PENANATJ6P0QZl8P
該如何利用這兩個水桶,裝出剛好4公升的水呢?736Please respect copyright.PENANADYhlZZ8W4w
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井邊有容量5公升跟3公升的兩個水桶,736Please respect copyright.PENANATJ6P0QZl8P
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該如何利用這兩個水桶,裝出剛好4公升的水呢?736Please respect copyright.PENANADYhlZZ8W4w
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736Please respect copyright.PENANA955f1CpYcK
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