容器开孔补强方法有（）。A、整体补强 B、局部补强 C、厚壁短管补强

Each person has his own way to have fun. Some like sports. Some like playing chess or cards. But a large number of people enjoy listening to music.

Nowadays, music has become an important part of our life. We can listen to music on CDs, on radio or on TV. Also, we can search the Internet to find the song we like. It’s the easiest way to enjoy the music that we like. Also we can download (下载）our favorite songs from the Internet for free. If we have a Walkman (随身听），we can hear music everywhere. It can give us pleasure if we are sad. It can cheer us up, too. When we are tired, it can make us relaxed.

Different people like different kinds of music. Young people like pop music. Maybe old people like gentle and quiet music. Different music can express different feelings. When we are happy, we like to listen to jubilant (欢快的) music. When we are unhappy, we want to hear soft music. We need different kinds of music in different moods. We can get different feelings from music. Music is the best friend of human beings. We can’t imagine what life would be like without music.

小题1:According to the first paragraph, we can know people play chess, cards or listen to music      .

A．for exercising

B．to learn more knowledge

C．for fun

D．to relax小题2:Which of the following is not mentioned in the passage?

A．Music can give us pleasure.

B．Music can make us relaxed.

C．Music can cheer us up.

D．Music can improve our listening skills.小题3:According to the last paragraph, we can know the old people like           probably.

A．gentle music

B．rock music

C．jazz music

D．pop music小题4:What does the underlined word “moods” mean in Chinese?

A．心情

B．喜怒无常

C．气氛

D．生气小题5:Which of the following is TRUE?

A．No one likes playing chess.

B．There are different kinds of music.

C．Listening to music can make us more tired.

D．Old people don’t like music at all.

在用计算器输入数据时，每输入一个数字，显示器上的数就向( )移一位。

将5（x+y）^-3写成只含有正整数指数幂的形式______．

一间会议室，长8.5米，宽6米，用长20厘米、宽10厘米的长方形砖铺地，要用多少块（）

A．2550

B．2500

C．2450

D．2650

煤矸石分离难易的评价尺度在哪？