在“研究杠杆平衡条件 的实验中1应先调节杠杆两端的平衡螺母使杠杆在 位置平衡如�现杠杆左端偏高则可将右端的平衡螺母� 调节或将 Template




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tomski在“研究杠杆平衡条件 的实验中1应先调节杠杆两端的平衡螺母使杠杆在 位置平衡如�现杠杆左端偏高则可将右端的平衡螺母� coloring