下列哪种蛋白质含有四级结构( ) A．肌红蛋白 B．胰岛素 C．胰蛋白酶 D

在所给的横线上改正下列词语中的错别字。

（1）玷污 笼罩 忍俊不禁 （2）决别 辜负 小心翼翼

（3）堕落 厄运 津津乐道 （4）嘹亮 盛名 害人听闻

更正：                                                                                                       

当气体膨胀时，哪一种压井方法把在环空产生的压力减至最小？（）

A、司钻法

B、等待加重法

鸡内金的功效特点是（）

A.消食兼能杀虫

B.消食兼能发表

C.消食兼能疏肝

D.消食兼能化石

E.消食兼能化痰

在春节、中秋节、情人节等节日即将来临的时候，许多商家都大作广告，以促销自己的产品。他们对市场进行细分的方法是( )。

A．地理细分

B．人口细分

C．心理细分

D．行为细分

Passage Two

One hot night last July,when our new baby wouldn’t or couhln’t sleep, I tried everything I could think of:a warm bottle, songs, gentle rocking. Nothing would settle him. Guessing that I had a long night ahead of me, I brought a portable TV into his room,figuring that watching the late movie was as good a way as any to kill of the hours till dawn. To my surprise, as soon as the TV lit up, the baby quieted right down, his little eyes focused brightly on the tube. Not to waste an opportunity for sleep, I then tiptoes out of the room,leaving him to watch the actors celebrate John Bellushi’s forty-fifth birthday.

My wife and I heard none of the baby that night, and the next morning when I went into his room, I found him still watching TV himself.

I found in my baby’s behavior a symbol of the new generation. My wife and I had given him some books to examine, but he merely spit upon them. When we read to him, he did not feel comfortable. And so it is in the schools. We find that our students don’t read and they look down upon reading and scold those of us who teach it. All they want to do is watch TV. After this experience with the baby, however, I have reached a conclusion : "Let them watch it ! "If television is that much more attractive to children than books,why should we fight about it Let them watch it all they want!

From this passage we know that the author is（）.

A．a doctor

B．a reporter

C．an editor

D．a teacher