井下保护接地系统的接地电阻一般不进行计算。
参考答案：对
简述发电机电气制动的构成原理？制动电阻的投入时间整定原则是什么？
I a bank account after I made﹩1 000 by doing a part-time job during the summer vacation.
A．borrowed
B．opened
C．entered
D．ordered
