双子叶植物维管束多为A．有限外韧型B．无限外韧型C．周韧型D．双韧型E．周木型

作者: rantiku 人气: - 评论: 0

问题双子叶植物维管束多为

选项 A．有限外韧型 B．无限外韧型 C．周韧型 D．双韧型 E．周木型

答案 B

解析

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