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 Manygirlsgotoyourhouse.Theybringalltheirpetdogs.Inall,...
问题详情: Manygirlsgotoyourhouse.Theybringalltheirpetdogs.Inall,thereare22headsand72feet.Howmanygirlsanddogsarethereintheroom?       A.6girlsand16dogs                   B.7gi...
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