题目内容
合点是指
2021-12-21
A.由表皮细胞特化而成的突起物
B.种皮上维管束汇合处
C.乌药药材呈纺锤形，有的中间收缩成连珠状
D.药材横切面上棕红色的麻点
E.药材横断面呈黄色，形成层为一棕色环
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