在探究杠杆平衡条件的实验中多次改变力和力臂的大小主要是为了a.减小�擦b.使每组数据更准确c.多次测量取平均值减小误差d.获取多组实验 Template




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tomski在探究杠杆平衡条件的实验中多次改变力和力臂的大小主要是为了a.减小�擦b.使每组数据更准确c.多次测量取平均值减小误差d.获取多组实验 coloring