植物的根长度能够不断增加这是因为a.根冠部分的细胞不断地增多b.成熟区的细胞不断地分裂 c.伸长区的细胞不断地伸长 d.根毛区的部位不断�上 Template




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tomski植物的根长度能够不断增加这是因为a.根冠部分的细胞不断地增多b.成熟区的细胞不断地分裂 c.伸长区的细胞不断地伸长 d.根毛区的部位不断�上 coloring