某同学设计了一个验证“幼嫩叶片可以产生生长素生长素能阻止叶柄脱落 的结论的实验 实验材料如图所示生长�育相同的同种植物若干含生长素的 Template




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tomski某同学设计了一个验证“幼嫩叶片可以产生生长素生长素能阻止叶柄脱落 的结论的实验 实验材料如图所示生长�育相同的同种植物若干含生长素的 coloring