“Who cares?”才是正确形式。从语法看,“who”作为疑问代词单独使用时,默认第三人称单数,谓语动词需用“cares”,如“Who is coming?”“Who knows”均体现此规则;仅当“who”引导定语从句且先行词为复数(如“people who care”)时,“care”才适用。日常口语中“Who care?”是不规范缩略,类似“I ain\'t”,正式写作(如学术论文、辩论)需用“cares”以保严谨。其固化还因单数形式强化“没人在乎”的反问语气,逻辑更清晰。综上,“w...