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yikki:已知喝掉的总量中有一杯橙汁。只统计喝的次数与量忽略加水的次数与量,以免混淆。喝了两个半杯一个全杯共2杯,其中一杯橙汁,所以一样多? (2014-10-21 16:04)
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HELVETICA:哈哈,很多人都会被迷惑的反正一杯橙汁都喝掉了。加了2次水,每次半杯。就是一杯水也喝掉了。还有来回找钱的事,也有人迷糊。 (2014-10-21 18:00)
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