问题 问答题 简答题

高压隔离开关为什么不能用来断开负荷电流和短路电流?为什么能在变配电所设备中获得普遍使用?

答案

参考答案:

高压隔离开关因为没有专门的灭弧装置,所以不能用来断开负荷电流和短路电流。高压隔离开关能将电气设备与带电的电网隔离,保证被隔离的电气设备有明显的断开点,能安全地进行检修,因而获得普遍应用。

阅读理解

Children, especially boys, tend to idealise their fathers when they are young.Every little boy wants to grow up to be just like his father, and every little girl thinks her father is the smartest man on the earth. It’s not very easy to be a good father, but it’s not that difficult either. Children will truly enjoy spending time with their fathers, not just when they are kids, but even when they are adults.

Not all children communicate well with their fathers. Communication is often left to mothers, while fathers dispense advice as and when necessary. Don’t expect all conversations to centre around the dinner table. Go to your children’s bedrooms and talk to them about school, their teachers or their friends. Remember that the conversation cannot be one-sided. When your children open up to you, you also need to open up to them.

If your children come home from school feeling upset, go up to them and ask them what is the matter. And if it is something which seems to you to be a silly reason to be upset, don’t voice your opinion. It may be silly to you, but to your children it is important enough. So don’t wave the topic away by telling them not to bother about such stupid things. Simply discussing their problems with them will help them feel better.

Don’t shy away from having discussions about your teenage children’s love lives. Generally speaking, your children are definitely not going to discuss intimate details with you. Try to let them know that you are relaxed about topics on love. Tell your children how you met your wife. It is perfectly normal for children to go through feelings for the opposite sex as they grow up, and by keeping the topic closed for discussion, you are only shutting them off from discussing their feelings with you. All they will do is turn to their friends.

小题1:To children their fathers are usually very ______.

A.important

B.great

C.serious

D.strong小题2:From the second paragraph we can know that ______.

A.some children don’t like their fathers at all

B.talking with children around the dinner table is bad

C.it is better for mothers to communicate with their children

D.mothers usually communicate better with their children.小题3: Suppose your children are worried about something you should _____.

A.have a talk with them

B.express your option

C.keep silent

D.let them alone小题4:Your children would not like to discuss their love lives with you probably

because they think__________.

A.you are relaxed about topics on love

B.they should ask for help from their friends

C.they have already grown up

D.it is not normal to experience feelings of love

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