问题 问答题 简答题

如何测试轨距杆绝缘?

答案

参考答案:

(1)中间加绝缘的的轨距杆:将万用表放在2.5V的交流挡,一表笔搭在轨距杆的铁板上,另一表笔分别搭在两个轨面上测;若测出电压,说明另一端杆与夹板间绝缘破损;

(2)两端加绝缘的轨距杆:将万用表入夏2.5V的交流挡,将一表笔搭在轨距杆上,另一表笔分别对两轨面测,若测出电压,则说明轨距杆的另一端绝缘破损;

(3)粘接式绝缘轨距杆:每年结合春、秋检,由工务配合拆卸下道,用兆欧表测试其不小于1MΩ。

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Before you make friends, you have to decide who you want to be your friends. Most people like to have friends who like to do the same kind of things they do.

The quickest way to make a friend is to smile. When you smile, people think you are friendly and easy to talk to. It may not be easy at first to smile, but remember most people will stay away from a scared or angry looking face.

One easy way to start a conversation with someone is to say something nice about him. Think about how great you feel when someone says something nice to you. Doesn’t it make you want to keep talking to that person?

Ask your new friends questions about themselves. Who’s their favorite singer, where do they live, what do they do after school are all good questions to start a conversation. Make sure you have something to add to the conversation, too. When someone asks you a question, do have an answer for them. There’s nothing that will stop a conversation quicker than a shrug (耸肩) for an answer.

Kids who show an interest in other kids and who are kind and friendly make good friends. Remember, everyone wants to be around people who like to do similar things and people who are nice to them.

小题1:This passage gives us some advice on _________.

A.how to make friends

B.what kind of person you can make friends with

C.how to start a conversation

D.the importance of smile小题2:Most people like to make friends with those______.

A.who are sad every day.

B.who share the same interest

C.who are fond of talking

D.who say bad things to them小题3:According to the third paragraph, most people enjoy talking to one _______.

A.who is always smiling

B.who seems to be friendly

C.who praises them

D.who points out their shortcomings.小题4:The underlined (划线的)part in this passage means “_______”.

A.being very proud

B.making no answer

C.knowing nothing

D.not hoping to answer