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Ifyouseesomeonedrowning,speedisveryimportant.Onceyouget...
問題詳情:Ifyouseesomeonedrowning,speedisveryimportant.Onceyougethimoutofthewater,ifheisn’tbrathing,youhavefourminutesbeforehisbrainiscompletelydestroyed.Supporthisneck,movehisheadbackandpresshischinup...