在实验探究过程中如果有多种因素同时影响某一实验结果当�们要探究其中的一种因素时就要保持其他因素保持不变以探究此种因素对实验结果的影响 Template




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tomski在实验探究过程中如果有多种因素同时影响某一实验结果当�们要探究其中的一种因素时就要保持其他因素保持不变以探究此种因素对实验结果的影响 coloring