【判断题】联锁设备分为集中联锁(继电联锁和计算机联锁)和非集中联锁(臂板电锁器联锁和色灯电锁器联锁)。
【单选题】The air-blast circuit breaker makes use the arc-quenching properties of ()
B.
a strong magnetic field
D.
dry and clean compressed air
【判断题】The electric locomotive usually uses the air blast circuit breaker as the main circuit breaker.
【简答题】IMF发放贷款的额度 () A、根据会员国的实际需要 B、没有最高界限 C、根据IMF规定的最低界限 D、与会员国缴纳的份额成正比