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No Plagiarism!31n0fpyOq7tmCmtq7QmNposted on PENANA
井邊有容量5公升跟3公升的兩個水桶,587Please respect copyright.PENANA0RTJjJ3u0G
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該如何利用這兩個水桶,裝出剛好4公升的水呢?587Please respect copyright.PENANAQDtpnrXjlL
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587Please respect copyright.PENANALEdCp4zdKv
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15.158.61.46
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