The line of computing jobs waiting to be run on a computer system might be a （）.The jobs are serviced in the order of their arrival,that is ,the first in is the first out.

A．queue

B．stack

C．array

D．record

下列情况会导致电机烧坏的是（）。

A、电机卡住

B、电机负载过轻

C、电机转速太快

D、电机没有负载