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No Plagiarism!rI59oRnlg2947ApQgQQcposted on PENANA
井邊有容量5公升跟3公升的兩個水桶,619Please respect copyright.PENANA1wdrgOxS1Y
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該如何利用這兩個水桶,裝出剛好4公升的水呢?619Please respect copyright.PENANAIBQWzWr7uo
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619Please respect copyright.PENANAjcckSr1rq3
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