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No Plagiarism!aBEMIeLExplh2L1j7tHkposted on PENANA
井邊有容量5公升跟3公升的兩個水桶,497Please respect copyright.PENANA8xjRACB3OI
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該如何利用這兩個水桶,裝出剛好4公升的水呢?497Please respect copyright.PENANAT9GJaIXBop
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497Please respect copyright.PENANASS9iDz90cn
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172.70.130.60
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