【单选题】Since the molecules of a gas are much too far from eachother to repel or attract each other it is very easy to compass agas, while a solid or liquid is almost incompressible,becausethe repulsions of t...
A.
该句是一个复合句,其主句是 it is very easy to compass a gas, while a solid or liquid is almost incompressible 。
B.
Because 引导的原因状语从句中包含了一个定语从句,先行词是 t he electrical charges 。