试题与答案

如图所示,轻弹簧上端与一质量为m的木块1相连,下端与另一质量为M的木块2相连,整

题型:选择题

题目:

如图所示,轻弹簧上端与一质量为m的木块1相连,下端与另一质量为M的木块2相连,整个系统置于水平放置的光滑木板上,并处于静止状态.现将木板沿水平方向快速抽出,设抽出后的瞬间,木块1、2的加速度大小分别为a1、a2,重力加速度大小为g.则有(  )

A.a1=0,a2=g

B.a1=g,a2=g

C.a1=0,a2g

D.a1=g,a2g

答案:

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参考答案:A

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题型:阅读理解

“Dr.Papaderos,what is the meaning of life?”

The usual laughter followed,and people stirred(骚动)to go.Papaderos held up his hand and stilled the room and looked at me for a long time,asking with his eyes if I was serious and seeing from my eyes that I was.

“I will,answer your question.”

Taking his wallet out of his hip pocket,he fished into a leather billfold and brought out a very small round mirror,about the size of a quarter.And what he said went like this:

“When I was a small child,during the war,we were very poor and we lived in a remote village.One day,on the road,I found the broken pieces of a mirror.A German motorcycle had been wrecked in that place.

I tried to find all the pieces and put them together,but it was not possible,so I kept only the largest piece.This one,and,by scratching it on a stone.I made it round. I began to play with it as a toy and became fascinated by the fact that I could reflect light into dark places where the sun would never shine——in deep holes and crevices(裂缝)and dark closets. It became a game for me to get light into the most inaccessible places I could find.

I kept the little mirror,and,as I went about my growing up,I would take it out in idle moments and continue the challenge of the game.As I became a man,I grew to understand that this was not just a child’s game but a metaphor for what I might do with my life.I came to understand that I am not the light or the source of light.But light——truth,understanding,knowledge——is there,and it will shine in many dark places only if I reflect it.

I am a fragment(碎片)of a mirror whose whole design and shape l do not know.Nevertheless,with what I have I can reflect light into the dark places of this world——into the black places in the hearts of men—and change some things in some people.Perhaps others may see and do likewise.This is what I am about.This is the meaning of my life.”

小题1:On hearing the author’s question,Dr.Papedotes       at first.

A.laughed at his foolishness

B.wasn’t sure of the answer

C.doubted his seriousness

D.wasn’t interested at all小题2:How did Dr.Papaderos get the small round mirror when he was a child?

A.He found it on the road and made it round.

B.A dying German soldier gave him as a present.

C.He chanced to find it in the street while playing.

D.He put the broken pieces together and made it.小题3:Why did Dr.Papaderos like the small round mirror so much as a child?

A.Because he was too poor to afford other toys.

B.Because it could shine the places where tke sun couldn’t reach.

C.Because he believed it would bring good luck to him.

D.Because it tofd him a lot about what life really meant to him.小题4:The underlined“metaphor”in the 7th paragraph most probably means       .

A.symbol

B.source

C.light

D.purpose小题5:Which of the following might be the best title for the passage?

A.A Special Game in the Childhood

B.A Broken Piece of Mirror

C.Dr.Papaderos’Experience

D.The Meaning of Life

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