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No Plagiarism!M58Fu31AhoBcYBint55Zposted on PENANA
井邊有容量5公升跟3公升的兩個水桶,628Please respect copyright.PENANASKPnRk79BB
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該如何利用這兩個水桶,裝出剛好4公升的水呢?628Please respect copyright.PENANAXbgnSfxfJO
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628Please respect copyright.PENANAxEesOgbCAb
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