【单选题】【消耗次数：1】
以下哪个条件不能确认新型冠状病毒感染?
①
同一份标本中新型冠状病毒2个靶标（ORF1ab、N）实时荧光RT-PCR检测结果均为阳性
②
两种标本实时荧光RT-PCR检测同时出现单靶标（ORF1ab或N）阳性
③
同种类型标本两次采样检测重复出现单个靶标阳性（ORF1ab或N）
④
单种标本单次单靶标阳性（ORF1ab或N）
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