程控交换机供给用户端电压一般为()伏。A.60 B.48 C.24 D.30

题型:单项选择题

问题:

程控交换机供给用户端电压一般为()伏。

A.60

B.48

C.24

D.30

考点:铁路通信工技能考试铁路通信工技能考试题库
题型:单项选择题

You probably know you should say” please” and “thank you ” at restaurants. You probably know the rules of a library. You know you should respect and be nice to your classmates. But do you have music manners?

Keep It Down! You have to notice the volume of your music. You should not play your music so loud that everyone around you can hear it. Some people might even get angry. Usually, when you play the music loud on an MP3 player, other people can’t hear the words of the song. They just hear a loud sound. Not one wants to listen to this. Very loud music can also be bad for your cars, so even if you are alone when listening to our MP3 player, you shouldn’t have it turned up too high.

Take Them off! You need to know when to turn your MP3 player off and put it away. Libraries and schools don’t allow MP3 players. There are other places, like museums, that don’t have rules,

but is would be rude to have your MP3 player on. Sometimes, it just doesn’t make sense to listen your MP3 player at event. Why would you listen to music at a play, a movie or a sporting event?  your would miss what is going on and others would wonder why you even came.

Take One Out! Once is a while it’s okay just to take out one earphone and not other. Imagine you are listening your MP3 player when someone asks you the way. It would not be rude to take out one earphone, tell him the way, and put back the earphone and continue listening. You can also do this when you order food at a fast-food restaurant or when you answer the telephone and it’s not for you.

It’s Your Choice! There are times when you need to decide what is best. For example, some people can listen to music on their MP3 Players when read books, while others think it is disturbing. In cases like this, you need to do what seems right for you.

小题1:The underlined word volume in Paragraph Two probably means” _____.

A.the type of music

B.the amount of a sound

C.the length of a song

D.the colour of and MP3 player小题2:No one wants to listen to _____ from others’ MP3 player.

A.a loud sound

B.sad stories

C.a long movie

D.the words of a song小题3:We should turn down the music when we are alone because loud music _____.

A.is not enjoyable

B.makes us tired

C.is bad for MP3 players

D.huts our ears小题4:If we listen to our MP3 player at a play, _____.

A.the theater won’t allow it

B.the actors will get angry

C.others won’t hear the play well

D.we will miss part of the play小题5: We can take once earphone out when we _____.

A.show others the way

B.talk to fiends on the phone

C.watch a sporting event

D.have dinner with our parents小题6:It’s all right to use our MPS player in _____.

A.schools

B.libraries

C.restaurants

D.museums小题7: What can be the best title of this passage?

A.Music Lovers

B.Music Manners

C.MP3 Players

D.MP3 Earphones

题型:单项选择题

如果关于x的方程7x2+px+q=0的两个根为2和-3,那么二次三项式7x2+px+q可分解为(  )

A.(x-2)(x+3)

B.(x+2)(x-3)

C.7(x-2)(x+3)

D.7(x+2)(x-3)

题型:单项选择题

如果x=-3是方程x2+mx+3=0的一个根,那么m的值是(  )

A.-4

B.4

C.3

D.-3

题型:单项选择题

已婚妇女,29岁,妊娠20周,一日前出现少量 * * 流血,继而出现阵发下腹痛妇科检查窗口未开,胎膜未破。一日来 * * 流血量增多,腹痛加剧,妇科检查宫颈口已张开。此时正确诊断为()。

A.先兆流产

B.难免流产

C.不完全流产

D.完全流产

E.动能失调性子宫出血

题型:单项选择题

治寒湿偏盛之疟疾宜选用()

A.广藿香

B.苍术

C.草果

D.草豆蔻

E.白豆蔻

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