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如图，在光滑绝缘的水平面上有两个质量均为m，均带正电的小球A、B，A球所带电量qA小于B球所带电量qB．在某时刻，A的速度大小为2v方向向右，B的速度大小为v方向向左，两小球速度方向在一条直线上，在...
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高三下学期物理《》真题及答案
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