同一时刻，身高2.26m的姚明在阳光下影长为1.13m；小林浩在阳光下的影长为0

求二项式（2-x）¹⁰展开式里含x⁷项的系数．

柴油机雾化不良，则会造成混合气燃烧不完全而冒白烟。

作文（60分）阅读下面的文字，根据要求作文。有人说：过一种平衡的生活——学些东西，想些问题，做些事情，打打球，唱唱歌，画画画儿……针对这种说法，同学们展开了热烈的讨论。请根据以上材料，结合自己的体验与感悟，写一篇不少于800字的文章。要求：①题目自拟，立意自定，文体自选；②不得抄袭，不得套作；③用规范汉字书写。

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

关于项目信息门户和项目管理信息系统的说法错误的是( )。

A．建设项目管理信息系统是基于数据处理设备的为项目管理服务的信息系统
B．主要用于建设项目的投资控制
C．由于业主和承包方项目管理目标和利益的不同，因此他们都必须有各自的项目管理信息系统
D．项目信息门户是项目参与各方可以共同使用的，为建设项目参与各方信息交流和共同工作共同使用的和互动的管理工具