问题 判断题

为了解决串补电容在距离保护的背后,造成的距离保护失去方向性,解决的办法是增加电抗继电器与距离继电器按或门条件工作。

答案

参考答案:错

解析:

题目来源:高压电网继电保护原理及技术

专业类型:继电保护

设备类型:线路

难度等级:一般

电压等级:220kV

知识点:保护原理

问答题
阅读理解

Tom arrived at the bus station quite early for the London bus. The bus for London would not leave until five to twelve. He saw a lot of people waiting in the station. Some were standing in lines, others were walking about. There was a group of school-girls. Their teacher was trying to keep them in order. Tom looked around but there was nowhere for him to sit.

He walked into the station café. He looked up at the clock there. It was only twenty to twelve. He found a seat and sat down, facing a large mirror on the wall. Just then, John, one of Tom’s friends, came in and sat with Tom.

“What time is your bus?” asked John.

“Oh, there is plenty of time yet,” answered Tom.

“Oh, I’ll get you some more tea then,” said John.

They talked while drinking. Then Tom looked at the clock again.

“Good heavens! It’s going back-ward!” he cried. “A few minutes ago it was twenty to twelve and now it’s half past eleven.” “You are looking at the clock in the mirror,” said John.

Tom wanted to kick himself for being so foolish. The next bus was not to leave for another hour. He has never liked mirror since then.

小题1:Tom went into the station café because _______.

A.John asked him to have a cup of tea

B.he wanted a drink there

C.he would meet a friend of his

D.it was early yet and he could find a place to sit小题2:What time was it in fact when he looked at the clock in the mirror?

A.Half past twelve.

B.Half past eleven.

C.Twenty to twelve.

D.Half past one.小题3:When we look at a clock in the mirror we’ll see _______.

A.the right time

B.it is going slower

C.it is going backward

D.it is going fast小题4:Which of the following is true?

A.Tom missed his bus.

B.He liked mirror even before.

C.The next bus would leave soon.

D.Tom arrived in London on time.