晶闸管的正向阻断峰值电压,即在门极断开和正向阻断条件下,可以重复加于晶闸管的正向峰值电压,其值低于转折电压()
A. 对
B. 错
TheGPIRSis()
An average of FMS1 position and FMS2 position
B. An hybrid position composed of the GPS and IRS positions
C. An average of the three IRS positions
D. An average of the three IRS positions and the RADIO position
列车乘务人员在车站停车或区间被迫停车时,严禁从列车通过的邻线一侧下车进行任何检查作业()
A. 对
B. 错
BSP青藏车综合柜PLC电池需要每5年更换一次()
A. 对
B. 错