如图是用小麦苗来验证植物生长需要无机盐的实验图解以及小麦苗根尖结构示意图.请回答问题1在实验中为了保证单一变量的原则a图中甲乙组 Template




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tomski如图是用小麦苗来验证植物生长需要无机盐的实验图解以及小麦苗根尖结构示意图.请回答问题1在实验中为了保证单一变量的原则a图中甲乙组 coloring