【简答题】如图所示电网中线路AB及BC均装有三段式距离保护(第Ⅲ段采用全阻抗继电器),试整定计算保护1各段的动作阻抗ZDZ,并进行灵敏度校验(若灵敏度不满足要求,不要求采取措施)。第Ⅲ段灵敏度校验按近后备进行校验。设线路长l=60km,线路阻抗按0.4Ω/km计算,K I K =0.85,II段K II K =0.8,III段K III K =1.25,K h =1.15,K zq =2.5,相邻线路BC考...
【单选题】Usually the low interest rate currency trades at a______to the high interest rate currency in the forward market.
【简答题】Liner rate are usually high.
【单选题】按照我国的技术要求,距离保护振荡闭锁使用()方法。
A.
由大阻抗圆至小阻抗圆的动作时差大于设定时间值即进行闭锁
B.
由故障起动对I、II段短时开放,之后发生故障需经振荡闭锁判别后动作
【简答题】In India there is a high divorce rate
【单选题】下列对工作分析访谈法的优点陈述错误的是
D.
可以唤起工作者的职责意识,规范其行为,从而有利于以后岗位描述的推行
【多选题】What caused the high incarceration rate in the US?
B.
Expansion of private prisons
C.
“Tough-on-crime” policy
【单选题】A high rate of separation between oil and water is favored by ().
A.
large size of oil globule