在探究“影响�擦力大小的因素 实验中同学们猜想�擦力的大小可能与以下因素有关�接触面所受的压力�接触面的粗糙程度�接触面积的大小� Template




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tomski在探究“影响�擦力大小的因素 实验中同学们猜想�擦力的大小可能与以下因素有关�接触面所受的压力�接触面的粗糙程度�接触面积的大小� coloring