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No Plagiarism!iVwEfc4qH961HMygLGT9posted on PENANA
井邊有容量5公升跟3公升的兩個水桶,598Please respect copyright.PENANAlpUElYDKXM
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該如何利用這兩個水桶,裝出剛好4公升的水呢?598Please respect copyright.PENANAm2rEkE2Uon
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598Please respect copyright.PENANA7P7jwLgkZW
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