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【单选题】
关于定量PCR的描述，不正确的是
A.
定量 PCR 在封闭状态下进行，有效避免了产物的实验室污染
B.
TaqMan 探针技术中 TaqMan 探针的位置位于两条引物之间
C.
定量 PCR 可用于病原体的核酸检测
D.
定量 PCR 是半定量检测 PCR 产物的方法
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