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No Plagiarism!XmSvxMb4gv6UDv37AL73posted on PENANA
井邊有容量5公升跟3公升的兩個水桶,596Please respect copyright.PENANAKEZCTgDgAt
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該如何利用這兩個水桶,裝出剛好4公升的水呢?596Please respect copyright.PENANAGPxOkVQdpW
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596Please respect copyright.PENANAh10fgYLQsa
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15.158.61.55
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