如图所示小球沿轨道由静止从a处运动到d处的过程中忽略空气阻力和�擦力仅有动能和势能互相转化.则 A.小球在a处的动能等于在d处的动能 b Template




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tomski如图所示小球沿轨道由静止从a处运动到d处的过程中忽略空气阻力和�擦力仅有动能和势能互相转化.则 a.小球在a处的动能等于在d处的动能 b coloring