基尔霍夫定律是电路理论中最基本也是最重要的定律之一，它概括了哪类电路遵循的基本规律？
A、集总参数电路 
B、分布参数电路
C、实际电路
D、虚拟电路

A．building charity school across England.
B．sending both his sisters to the United States.
C．going to India as a missionary.
D．joining the army to fight overseas.