如图所示虚线表示等势面有一带电粒子只在电场力作用下运动的轨迹如图中实线所示abc为轨迹上三个点依此可判断出 A.该粒子带正电b Template




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tomski如图所示虚线表示等势面有一带电粒子只在电场力作用下运动的轨迹如图中实线所示abc为轨迹上三个点依此可判断出 a.该粒子带正电b coloring