如图所示仅在电场力作用下一带电粒子沿图中虚线从a运动到 b则 A.电场力做正功 b.动能减� C.电势能增加 D.加速度增大 题目和参考 Template




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tomski如图所示仅在电场力作用下一带电粒子沿图中虚线从a运动到 b则 a.电场力做正功 coloring