8.如图仅在电场力作用下一带电粒子沿图中虚线从a运动 到b实线表示电场线则 A.电场力做负功 b.电势能增加 c.动能增——青 Template




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tomski8.如图仅在电场力作用下一带电粒子沿图中虚线从a运动 到b实线表示电场线则 a.电场力做负功 coloring