励磁系统通常情况下,对A套而言,PT1为励磁PT,PT2为仪表PT;对B套而言,PT1为仪表PT,PT2为励磁PT。
举一反三
- Using the notation Pt to designate this period's price level and Pt-1 to designate last period's price level, the formula for measuring the inflation rate from last period to this period is A: [(Pt - Pt - 1) / Pt] × 100. B: [(Pt -1 - Pt) / Pt - 1] × 100. C: [(Pt - Pt - 1) / Pt - 1] × 100. D: [(Pt -1 - Pt) / Pt] × 100.
- 下列电池中电动势E最大的是 A: Pt | H2 (2 pø) | H+ (a = 1) || H+ (a = 1) | H2 (pø) | Pt B: Pt | H2 (pø) | H+ (a = 1) || H+ (a = 0.5) | H2 (pø) | Pt C: Pt | H2 (pø) | H+ (a = 1) || H+ (a = 1) | H2 (pø) | Pt D: Pt | H2 (2 pø) | H+ (a = 1) || H+ (a = 0.5) | H2 (pø) | Pt
- 将反应H2(pθ)+1/2O2(pθ)= H2O(l) 设计成电池,下列正确的是( ) A: Pt | H2(pθ)| H+(α)| O2(pθ)| Pt B: Pt | O2(pθ)| OH-(α)| H2(pθ)| Pt C: Pt | O2(pθ)| OH -(α1)|| H+(α2)| H2 (pθ)| Pt D: Pt | H2(pθ)| H+(α1)|| OH -(α2)| O2(pθ)| Pt
- 若Pt表示静态投资回收期,Pt′表示动态投资回收期,对于一个确定项目来说,( )。 A: Pt大于Pt′ B: Pt等于Pt′ C: Pt小于Pt′ D: 无法确定Pt与Pt′的大
- 下列关于Pt与Pt的说法正确的是 A: Pt与Pt是同一种核素 B: Pt与Pt的质量数相同 C: Pt与Pt互为同位素 D: Pt与Pt的中子数均为78