下列运算正确的是[ ] A．5a2-3a2=2 B．2a2+3a2=5a4 C．

阅读理解。

     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.

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

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

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

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

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

6. It's all right to use our MPS player in _____.

A. schools

B. libraries

C. restaurants

D. museums

7. What can be the best title of this passage?

A. Music Lovers

B. Music Manners

C. MP3 Players

D. MP3 Earphones

读下图，完成下列问题。

小题1:甲城与我国上海市的纬度位置大致相当，但两地气候特点不同，造成这种差异的主要因素是     

A．太阳辐射

B．大气环流

C．距海远近

D．洋流小题2:近年来，乙处海域面积的变化趋势及其原因是

A．缩小—蒸发量大，且几乎无河流汇入

B．缩小—非洲板块和印度洋板块的消亡边界

C．扩大—非洲板块和亚欧板块的生长边界

D．扩大—非洲板块和印度洋板块的生长边界

强文化

下表中列举的史实是全球化进程中的一些重要事件，表中推论符合史实的选项是[ ]

建设社会主义新农村，最重要的是发展农业和农村经济。( )