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No Plagiarism!umd2ArBw1gMRQpdNzj3Qposted on PENANA 1. 把5L水桶裝滿倒進3L中,剩2L。419Please respect copyright.PENANATliWzbbKbT
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2. 3L水桶倒空,2L從5L水桶倒過來後,把5L再次裝滿。419Please respect copyright.PENANAfC3rdEY6bz
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3. 再從5L水桶倒出1L到3L水桶,就OK了。419Please respect copyright.PENANA6ObunA0rb8
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