库仑力与万有引力之间的关系是___ The relationship between the Coulomb Force and the Universal Gravitation Force is___
A、都与距离平方成反比 It's inversely proportional to the square of the distance
B、都是吸引力 It's all attraction
C、都是排斥力 It's all repulsive
D、又可能是吸引力又可能是排斥力 It could be attraction or it could be repulsion