利用如图所示的装置做如下实验小球从左侧斜面上的o点由静止释放后沿斜面�下运动并沿右侧斜面上升.在斜面上先后铺垫三种粗糙程度逐渐降低的材料后 Template




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tomski利用如图所示的装置做如下实验小球从左侧斜面上的o点由静止释放后沿斜面�下运动并沿右侧斜面上升.在斜面上先后铺垫三种粗糙程度逐渐降低的材料后 coloring