110kV电缆终端按照外绝缘介质的不同分为哪几类？外绝缘介质分别是什么？

阅读理解。

     Feb.3,2006-According to CCTV 4,Chinese scientists have recently taken the lead in building the first

full super-conducting experimental nuclear fusion (核聚变) device known  as"artificial sun"in the world,

which will produce energy like the sun.

    It is reported that this device consists of five layers of components(成分)from inside to outside and the

circulating magnet container in the innermost layer looks like a giant" swim ring". In experimental tests,the

temperature of inner" swim ring" will reach as high as 100 million degrees Celsius. Therefore,such

component is a significant part to stimulate solar fusion reactions.

    Wan Yuanxi,who is in charge of the project called Experimental Advanced Super-conducting

Tokamak( EAST) ,an important scientific project under China's ninth five-ycar plan,explained the reason

why the sun always gives off light and why the energy it produces will not decrease. Under high pressure

and high temperature, fusion reactions will take place from inside to outside of the sun.

     Such fusion reactions will give rise to a great deal of energy to enable the sun to continuously emit light

and heat. However,fusion reactions on the sun are uncontrollable,just like an H-bomb explosion seen on

the earth. A huge amount of energy will be produced in a minute,which may be destructive. In order to

make use of such energy,a transformation from the process of energy production to a stable,sustainable

and controllable process is needed. EAST is serving to initiate such a transformation. Under magnetic

force,the op-

eration of hydrogen plasma isotope (同位素) will be restrained in the" swim ring" and high density

collision will happen, namely the fusion reactions. The hydrogen isotope got from one liter of seawater

can produce energy equal to 300 liters of gasoline through complete fusion reactions.

    Wan said that we can get endless clean energy by producing such a device for accomplishing fusion

reactions,which is equal to one or a few small suns made by human beings themselves so that they can

ceaselessly obtain energy from nuclear fusions.

1. What's the best title for the passage?

A. Wan Yuanxi and His Invention.

B. The Sun and the" Artificial Sun".

C. How to Produce the" Artificial Sun".

D. China Built the World's First"Artificial Sun".

2. What does the underlined word" artificial". ( in Para. 1 ) mean?

A. Not real.                        

B. Man-made.

C. Actual.                          

D. Ancient.

3. Which of the following is NOT true?  

A. The temperature of the innermost part of the " artificial sun" will reach as high as 100 ,000 ,000?.

B. EAST is an important scientific project under China's ninth five-year plan.

C. Such fusion reactions in the" artificial sun" will give us limited energy.

D. The hydrogen isotope got from one liter of seawater can produce energy equal

     to 300 liters of gasoline through complete fusion reactions.

4. What's the purpose of making the" artificial sun" ?     

A. To get more energy.

B. To get more light.

C. To have the sun shining for us in 24 hours

D. To study the inside of the real sun.

阅读理解。

     Doctors say anger can be an extremely damaging emotion, unless you leam how to deal with it. They warn

that anger can lead to heart disease, stomach problems, headaches, emotional problems and possibly cancer.

     Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm

reasonable way. Others burst with anger, and scream and yell. But other people keep their anger inside. They

can not or will not express it. This is called repressing anger.

     For years many doctors thought that repressing anger was more dangerous to a person's health than

expressing it. They said that when a person is angry, the brain releases the same hormones (荷尔蒙). They

speed the heart rate, raise blood pressure, or sugar into the blood, etc. In general the person feels excited and

ready to act.

     Some doctors say that both repressing and expressing anger can be dangerous. They believe that those who

express anger violently may be more likely to develop heart disease, and they believe that those who keep their

anger inside may face a greater danger of high blood pressure.

     Doctors say the solution is learning how to deal with anger. They say the first step is to admit that you are

angry and to recognize the real cause of the anger, then decide if the cause is serious enough to get angry about.

If it is, they say, "Do not express your anger while angry. Wait until your anger has cooled down and you are

able to express yourself calmly and reasonably."

     Doctors say that a good way to deal with anger is to find humor in the situation that has made you angry.

They said that laughter is much healthier than anger.

1. "Damaging emotion" means that _____. [ ]

A. the emotion is harmless

B. the emotion is hannful

C. the feeling is veiy strong

D. the feeling is hard

2. What statement is right?[ ]

A. Were you angry,you would be cancered (得癌症).

B. Once you are angry,you must be cancered.

C. Angry as you are often,you can't be cancered.

D. Anger may cause you a cancer.

3. Expressing anger violently _____ repressing it according to some scientists. [ ]

A. is just the same as

B. is more harmful than

C. is no better than

D. is much better than

4. According to the author, you'd better _____. [ ]

A. never be angry

B. cool it down before you express it

C. laugh and laugh when you get angry

D. admit you are wrong when you are angry

变频调速系统中的变频器一般由（）组成。

A.整流器、滤波器、逆变器

B.放大器、滤波器、逆变器

C.整流器、滤波器

D.逆变器

一台路由器的路由表如下所示。当它收到目的IP地址为40.0.2.5的数据报时，它会将该数据报( )。

A．投递到20.0.0.5

B．直接投递

C．投递到30.0.0.7

D．抛弃