若单项式2x2m﹣3y与x3y3n﹣2是同类项，则符合条件的m，n的值为 [ ]

PU—402的出口压力突然升高的原因，可能是（）。

A、PU—402前的过滤器堵塞

B、PU—402后的管道堵塞

C、回流阀开度太大

补写出下列名句名篇中的空缺部分。

（1）仰观宇宙之大，_______________，所以游目骋怀，足以极视听之娱，信可乐也。（王羲之《兰亭集序》）

（2）_______________，使我不得开心颜？（李白《梦游天姥吟留别》）

（3）出师未捷身先死，_______________。（杜甫《蜀相》））

（4）冰泉冷涩弦凝绝，凝绝不通声暂歇。_______________，_______________。（白居易《琵琶行》）

（5）_______________，千载谁堪伯仲间！（陆游《书愤》）

We live in a dangerous world. The figures for crime go up year by year. If you were attacked in the street, would you be able to defend yourself? Not very well probably, especially if someone was pointing a gun at you. We all see a lot of violence of films, but recently some programs on television showed how people can defend themselves without guns. For example, in one film a woman was attacked from behind. She threw the man, who was heavier and stronger than she was, over her head. Then she held him tightly on the ground. How? She knew Judo.

Jiu-jitsu, as judo is sometimes called, means "muscle science" in Japanese. The student of judo needs to learn a lot about the body, its bones and muscles. Judo uses a number of "falls", "holds" and "throws". Someone who does not know judo cannot defend himself against them. If you know judo you can defend yourself against a person who is stronger than you. You had better not practice judo on your friends unless they can fall without hurting themselves! Being strong is one thing, but using the body wisely is another. In judo, you use the other person's body to help you. You "throw" him to the ground and "hold" him there, so that he cannot move. Of course, it takes time and practice, but knowing judo is useful. In a violent world you ought to be able to defend yourself.

小题1:According to passage, in fact "judo" is ______.

A．the same as "Jiu-jitsu"

B．a kind of fighting

C． a kind of muscle science

D．is helpful to a strong man小题2:Why does the writer say the world is dangerous?

A． The number of violence and crime is increasing every year.

B．Because many people carry guns.

C．Because there too many films.

D．Because people are not able to defend themselves.小题3:Which of the following statement is true about the woman in the passage?

A．The woman held the man over her head.

B．The woman was heavier than the man.

C．The woman was able to defend herself.

D．The woman attacked the man from behind.小题4:If a man knows judo, he ______.

A．will be good at muscle science.

B．will be able to avoid being attacked from his back.

C．may defeat any strong person.

D．can help himself by using the other person's body小题5:What's the best title for this short passage?

A．How to defend oneself

B．Violence in films

C．How to practise judo

D．Something about judo

在Outlook中可以借助（）的方式传送一个文件。

A.FTP

B.导出

C.导入

D.附件

现实生活中人们订阅报刊一般通过邮局进行，而现在有一种报刊可以不通过邮局发行，它是通过（）进行传输的。

A.局域网

B.校园网

C.报刊发行专用网

D.Internet