计算题:某台300MW发电机组年可用小时为7900.23h,运行小时数为5341.6h,求该机组备用小时数。
高压隔离开关在调试时,三相同期允许误差为()。
A. ±1mm
B. ±2mm
C. ±3mm
D. ±4mm
密封镉镍电池每个单体电池额定电压为1.2v,充电至()时应停止充电。
A. 0.5v
B. 1v
C. 1.2v
D. 1.6v
Which three are the phases of the Cisco Smart Business Roadmap?()
A. foundation
B. optimized
C. implemented
D. growth
E. finished
F. beginning