问题 选择题

下列结构中,由神经元的突起汇集的部位是(  )

A.大脑皮层

B.脑神经

C.神经中枢

D.脊髓灰质

答案

神经系统由脑、脊髓和它们所发出的神经组成,脑和脊髓是神经系统的中枢部分,叫中枢神经系统;由脑发出的脑神经和由脊髓发出的脊神经是神经系统的周围部分,叫周围神经系统.神经系统的结构和功能的基本单位是神经元.神经元(又叫神经细胞),神经元的基本结构包括细胞体和突起两部分,神经元的突起一般包括一条长而分支少的轴突和数条短而呈树枝状的树突,轴突以及套在外面的髓鞘叫神经纤维,有神经纤维再构成神经,大脑皮层、神经中枢和脊髓灰质主要是由神经元的细胞体构成的,可见C符合题意.

故选:C

多项选择题
完形填空

第二节:完形填空(共20小题;每小题1.5分,满分30分)

阅读下面短文,掌握其大意,然后从21-40各题所给的四个选项(A、B、C和D)中,选出最佳选项。 

I started to win competitions. We had very little money. My father had to borrow$5000 to pay for a 21 to the International Young Pianists Competition in Germany when I was 12. I realized later how 22 pressure (压力)he was under as I looked at the invitation to the competition. Tears streamed 23 his face when it was announced that I ’d won—— earning enough money to pay  24  the money we borrowed .

It was soon clear that I couldn’t  25 in China forever. To become a world-class 26 , I had to play on the world’s big stages. So later, my father and I  27 to America, so I could attend a famous university to study  28 . the school paid for my apartment and even lent me a piano . At night, I would stay in the living room just to touch the keys.   

29 I was in America, I wanted to become famous, but my new teachers 30 me that I had a lot to learn, I spent two years practicing, and by 1999 , I had worked hard enough for opportunity to come, one morning later, I got a  31 .The great pianist Andre Watts, who was to 32 at Chicago’s Ravinia Festival, had become ill. I was asked to  33 him. That performance was for me at the moment. After violinist Isaac Stern  34 me, I played Tchaikovsky’s (柴可夫斯基的)Piano Concerto No. 1. My father’s mouth hung  35 throughout the whole song.

Afterward, people celebrated—maybe they were a bit  36 –and asked me to play another one . I played until 3:30 a.m. I felt that something big was going to_37_. Sure enough, gigs(短期表演)started pouring in.

My father and I had often practiced a piece of music called “Horses”, a fun piece for piano and erhu. One night in Carnegie Hall, after I played Chopin(肖邦), I brought Dad out on the stage , and we played our special music. People 38 crazy—they loved it. My father couldn’t sleep for days. He was too happy to sleep.

There have been lots of 39 in Carnegie Hall, but for me, playing there was especially sweet. Together, my father and I worked to 40 the lucky place where a good chance caught sight of me , and let me shine. At last I made it.

21.A. trip                 B. travel            C. tour              D. voyage

22.A. many         B. old              C. much          D. long 

23.A. on            B. down            C. across           D. through 

24.A .for            B. back            C .off            D .over

25.A. study        B. work            C. play           D. stay

26.A musician     B. physician          C. politician       D. singer

27.A. moved      B. removed         C. settled            D. fled

28.A. performance B. instruments       C. music               D. dance

29.A. Even if               B. Such as           C. Now that           D. Only if 

30.A. reminded     B. requested          C. asked              D. ordered

31.A. performance B. chance            C. visit                  D. ticket

32.A. perform    B. join               C. appear       D. attend 

33.A .act           B. take             C. replace       D. place

34.A.visited               B. told               C. asked             D. introduced

35.A .open           B. closed           C. covered       D. round

36.A .upset          B .drunk            C. confused       D. anxious

37.A. break         B. come             C .end             D .happen

38.A. grew                B. went              C. became          D. was

39.A. people       B. guests             C. concerts        D. dramas

40.A .arrive        B. get                C. win            D. reach