α-鸢尾酮香料的分子结构如图，下列说法不正确的是 [ ] A．α-鸢尾酮可与某种

阅读理解。

     I have a good friend. His name is Jim. Jim is an English boy. He comes to China with his parents.

They come to China to work. Jim comes here to study. He is in No. 5 Middle School.      

     He is never (从不)  late for school.  He studies hard at school. He can read and write English well.  

He can also speak a little French. He often helps us with our English, and we help him with his Chinese.

After class he likes playing football, swimming and running. He makes many friends here. We are glad to

stay with him.

     On weekends he often helps his mother clean the house, do some housework or do some shopping.

He likes living here. He thinks Chinese food is very good. He likes Chinese students very much. We all

like him, too.

1. Where is Jim from?         

A. France.                      

B. China.         

C. The UK.                     

D. The US.

2. Why do Jim's parents come to China?         

A. Because they want to study.         

B. Because they come to China to work.         

C. Because China is interesting.         

D. Because they like Chinese food.

3. Jim is good at _____.       

A. Chinese                      

B. English         

C. French                      

D. math

4. What doesn't Jim often do on weekends?         

A. Help his mother clean the house.         

B. Do some housework.         

C. Play computer games.         

D. Do some shopping.

5. Which of the following is NOT right?        

A. Jim often helps his mother.         

B. Jim likes Chinese food.

C. Jim is a popular student.

D. Jim doesn't like going shopping.

胃癌最好发的部位是

A．胃小弯

B．胃体部

C．胃底部

D．胃窦部

E．贲门部

阅读理解。

     Lunar New Year has long been the most important cultural celebration on the Chinese calendar. And

even for those who scoff (嘲笑) at superstition (迷信), Chinese New Year customs can  bring a welcome sense of renewal to a seemingly endless winter.

1. Clean Your House

     The Chinese make sure to sweep every corner of a room to rid their homes ghosts and bad luck

associated with the old year. If negative spirits don't hide in your living room, chances are a layer of dust

and grime (污垢) from dry heat and slushy (有泥有雪的) boots does. Get a jump on your spring

cleaning while the weather outside's still frightful enough to keep you stuck indoors

2. Get a Mini Makeover

     In China, it's customary to get a haircut and new clothes for the new year. The idea is that with a new

look, bad spirits won't recognize a person and follow them into the new year.

3. Make Apologies

     Carrying grudges (怨恨) into the new year is a no-go according to Chinese tradition, so differences

with family, friends, and associates must be settled before New Year's Eve. If your shoulders are

sagging(向下凹,下陷) from the weight of a grudge or two, take the initiative to resolve them.

4. Pay Off Your Debts

     Like grudges, old debts are a bad omen (预兆) for a new year. No matter which calendar you follow,

there's no time like the present to settle any outstanding accounts and repay loans from friends and

relatives.

5. Spend Time With Your Family

     In China, offices and stores close down for Chinese New Year and people spend days travelling to

their hometowns to reconnect with family, feast, and simply enjoy the company of their loved ones.

1. According to the passage, Chinese New Year customs          .

A. are foolish acts associated with superstition      

B. bring happiness to Chinese people

C. imply the ending of the winter                

D. are neglected by many people

2. Traditionally, the purpose of cleaning the house is to          .

A. get rid of evils and misfortune                

B. find out the bad spirits in the rooms

C. clean up all the dust and grime                

D. keep away the bad weather

3. Customarily, what may happen if you began a new year without a new look? 

A. Your friends will not recognize you.            

B. You will be looked down upon.

C. You will be seen as lack of good luck.          

D. You will be followed by a bad guy.

4. According to the passage, which of the following is also Chinese tradition?

A. Exchanging gifts.    

B. Have family union.    

C. Share debts.    

D. Set goals.

重症肌无力常与哪一种疾病同时存在（）

A.甲状腺肿瘤

B.甲亢

C.胸腺肿瘤或胸腺增生

D.系统性红斑狼疮

E.多发性神经炎

在计算机网络中，实现数字信号和模拟信号之间转换的设备是 【12】 。