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【单选题】
在牛黄解毒片的显微化学反应中,取本品研细,加乙醇10mL,温热10分钟,滤过,取滤液5mL,加镁粉少量与盐酸0.5mL,加热,即显红色,为鉴别方中哪味药材的反 应
A.
大黄
B.
牛黄
C.
黄芩
D.
雄黄
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