洋�是生物学实验的常用材料之一某同学利用洋�进行观察植物细胞有丝分裂的实验.1培养洋�根尖时如果没有经常换水会出现烂根现象原因是 Template




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tomski洋�是生物学实验的常用材料之一某同学利用洋�进行观察植物细胞有丝分裂的实验.1培养洋�根尖时如果没有经常换水会出现烂根现象原因是 coloring