The real-name system _______ train tickets will be sold based on real names is aimed to fight ticket-scalping, which has long been a headache for Chinese travelers.A.whichB.thatC.from whichD.in which
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D解析考查定语从句关系词的选择。根据句子结构可知，该句为定语从句，先行词system在定语从句中从当状语，故选择where=in which 意为在这项实名制的系统中