某同学从生物学资料中得知“植株上的幼叶能合成生长素防止叶柄脱落 为了验证这一结论该同学利用如图所示的植株进行实验实验中所需要的步骤是 Template




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tomski某同学从生物学资料中得知“植株上的幼叶能合成生长素防止叶柄脱落 为了验证这一结论该同学利用如图所示的植株进行实验实验中所需要的步骤是 coloring