He has lived at     for 30 years.

A．No. 101 heping Street

B．101 Heping Street

C．Heping Street 101

D．Heping Street No. 101

并励直流发电机只要主磁路有剩磁，电枢绕组与励磁绕组连接正确，并保证后续磁场与剩磁同方向，就能建立工作所需的电压。