常用的数据交换技术有（）。 A.报文交换 B.线路交换 C.电路交换 D.分组交换

下列不属于生物的是（　　）

A．克隆羊

B．机器人

C．珊瑚虫

D．病毒

当塑化液接触粘膜后立即用棉球擦去，为避免烧伤应在粘膜上涂敷

A．碘甘油

B．甘油

C．龙胆紫

D．碘酒

E．浓台氏液

阅读理解。

         Childhood was an illusion(错觉)  and the illusion was this:everything was bigger. No, I

ruean everything, not just houses and shops and grown-ups, but colors and flowers and joumeys,

especially journeys which  seemed endless. "Are we there yet, Daddy?"

        Funfairs(游乐场)  were huge things that spread for miles around you with noise and lights

and exciting  danger. Rainy days at home when you were ill seemed  to last for ever. Being a

grown-up yourself was an un- thinkable distant possibility. Every sound was louder, every

game was grander, every pain was unbearable.

        As I've grown old, life has become smaller. Tastes  have dulled. Surprises have turned into

shocks. Days go  by unnoticed. How can I regain childhood when it was  an illusion?

        I have only one repeatable and wonderful way and even in this way I can regain only part

of that larger  world.l can play upon the stage like a child and make  the crowd laugh with them,

sonletimes helplessly like a child, and then, even though I'm a sixty-one-year-old man, I can almost

catch the colors and sounds and  stillness of those bigger years when I was little.

1. How does the author feel about his childhood?      

A. It was endless.

B. It was unpleasant.

C. He is glad that it is over.

D. He misses it as a grown-up.

2. The author thinks that everything was bigger in childhood because     ___  

A. children could not make proper judgments

B. children were cunous and eager about life

C. things appeared really big in children's eyes

D. to grow up seemed so long for children

3.The world seems to have become smaller to the author because _______.    

A. life is disappointing

B. time goes by too fast

C. he has had too many surprises

D. foods no longer taste delicious

4. The author enjoys playing on the stage so as to                 

A. act like a child

B. live an unusual life

C. make the crowd laugh

D. regain his childhood

右图为等量异种电荷产生的电场线，带电量为q的点电荷在两个异种电荷连线的垂直平分线上移动，则 (　　　)

A．当q>0时，电场力做正功

B．当q>0时，电场做负功

C．电场力一定不做功

D．电场力一定做正功

（）关于赌博所引出问题的讨论，开创了概率理论的建设。

A.巴斯卡和费马

B.格朗特

C.棣莫弗

D.贝叶斯