下列哪一项是在设计换流变压器短路阻抗时无需考虑的?()
A.限制阀臂及直流母线短路时的故障电流
B.运行中的无功损耗
C.直流系统容量
D.换相压降
参考答案:C
---Tomorrow we’ll go to the zoo for our class trip. How will we get there?
--- You can get there , but I’ll walk there.
A.by bus
B.by a bus
C.take a bus
D.with a bus
领导者的法定权力表现在哪些方面?