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No Plagiarism!MMfFns2iTaaHJ5UEX6xcposted on PENANA
井邊有容量5公升跟3公升的兩個水桶,486Please respect copyright.PENANA9wzHEgSWX0
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該如何利用這兩個水桶,裝出剛好4公升的水呢?486Please respect copyright.PENANAF1IIG32mzn
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486Please respect copyright.PENANARnYOz8Ye8z
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172.69.59.61
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