如图一带电粒子射入电场中运动轨迹如图中虚线所示ab为粒子运动路径上的两个点下列说法正确的是 A.粒子带正电b.粒子在a点的加速度 Template




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tomski如图一带电粒子射入电场中运动轨迹如图中虚线所示ab为粒子运动路径上的两个点下列说法正确的是 a.粒子带正电b.粒子在a点的加速度 coloring