logo - 刷刷题
下载APP
【多选题】

振荡和短路区别()。

A.
振荡时电流、电压变化速度较慢
B.
短路时电流、电压突变
C.
需装设高压线路因故障跳闸的联锁切机、切负荷
举报
题目标签:振荡短路
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, choose the best answer from the four choices marked A),...

A.
He collected it from the newspaper he subscribed to.
B.
He found it when thumbing through a magazine.
C.
He chanced upon it on a fridge when visiting a friend.
D.
He worked for the financial newspaper IBD.

【多选题】()属于非对称短路。

A.
单相短路
B.
两相短路
C.
两相接地短路
D.
三相短路

【单选题】次同步振荡的频率通常()。

A.
大于50赫兹
B.
小于50赫兹
C.
等于50赫兹
D.
50赫兹左右