双子叶植物根类药材横切面上通常可见的一圈环纹是A.木栓形成层 B.皮层纤维束环带 C.内皮层 D.形成层 E.环髓纤维

作者: tihaiku 人气: - 评论: 0
问题 双子叶植物根类药材横切面上通常可见的一圈环纹是
选项 A.木栓形成层 B.皮层纤维束环带 C.内皮层 D.形成层 E.环髓纤维
答案 D
解析

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