某静电场的电场线如图所示虚线表示一带电粒子仅在电场力作用下的运动轨迹ab为轨迹上的两点.以下判断正确的是 A.粒子带负电b.a点电势 Template




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tomski某静电场的电场线如图所示虚线表示一带电粒子仅在电场力作用下的运动轨迹ab为轨迹上的两点.以下判断正确的是 a.粒子带负电b.a点电势 coloring