单选题:黄酮类化合孥勿的颜色加深,与助色团取代位置与数目有关,尤其在(  )

题目内容:
黄酮类化合孥勿的颜色加深,与助色团取代位置与数目有关,尤其在(  ) A.7,4'位
B.5位
C.3',4'位
D.6,7位
E.5,7位
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答案解析:

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