电压互感器的误差与哪些因素有关?
参考答案:①电压互感器的励磁电流;
②互感器绕组的电阻、感抗及漏抗;
③二次负载大小及功率因数;
④一次电压波动情况。
You were my ________ when I was weak;you were my voice when I couldn't speak.[ ]
A.ability
B.strength
C.energy
D.force
联胺与氧反应生成(),因此不会增加锅水溶解固形物。
A、二氧化碳和水
B、二氧化硫和水
C、氨气和水
D、氮气和水