搜题请搜索小程序“爱下问搜题”
问题 判断题

PSL-621C线路保护的启动元件包括突变量启动元件，零序电流辅助启动元件和静稳破坏检测元件，任一启动元件动作则保护启动。

答案

参考答案：对

解析：

题目来源：南自PSL-620C线路保护装置说明书

专业类型：继电保护

设备类型：线路

电压等级：110KV

知识点：保护原理

改错题

短文改错

I used to feeling pressured to do well in exams. I was such afraid of falling behind that I kept thinking about studying every minute of the day. The pressure makes me out of breath. To my disappointed, the more worried I was about my studies, the less effective I became. Later, I realized I just took pressure too serious. So I tried taking things easy by taking part in various activity out of class, enjoying music and even daydreaming about fun things.

To my delight, this worked! Gradually，I became more anxious about exams and began to take pleasure in my studies. Pressure cannot avoided. What counts is how to deal with properly, but above all, how to turn it into pleasure or challenge.
查看答案
名词解释

混合液挥发性悬浮固体浓度
查看答案