题目内容
板蓝根药材的鉴别特征有
2021-10-23
A.根头部略膨大，可见轮状排列的暗棕色叶柄残基
B.断面可见数轮同心环纹
C.气微，味微甜而后苦涩
D.薄壁细胞含草酸钙族晶
E.水煎液置紫外灯下观察显蓝色荧光
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