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No Plagiarism!nMT7huraxLoAcFpWaOafposted on PENANA
井邊有容量5公升跟3公升的兩個水桶,635Please respect copyright.PENANAQ2vHpYAr1R
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該如何利用這兩個水桶,裝出剛好4公升的水呢?635Please respect copyright.PENANAhRgdp7Nzp7
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635Please respect copyright.PENANA7hKS92qRe6
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