根吸收水分和无机盐主要是由下面哪一结构完成的 A.根冠 b.伸长区 c.成熟区 d.分生区 评卷人 ——青夏教育精英家教�—— Template




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tomski根吸收水分和无机盐主要是由下面哪一结构完成的 a.根冠 b.伸长区 coloring