给航天员带到太空的食物中，至少应该含有哪些成分？为什么需要这些成分哪？

阅读理解。

     I'll tell you a story about a Chinese student. It happened when he studied in England. His family name

was Sun. It is spelt S-U-N, just the same as the English word "sun", the sun in the sky.

     England is a country with bad weather. It is often cloudy or misty and it rains now and again, so the

people don't get much sunshine in the year.     

     When the Chinese student arrived at London Airport, a tall English policeman with a long face checked

his passport. The policeman was interested to find the Chinese name "Sun" in the passport. He thought it

was pronounced just like the English word "sun", so he said to the Chinese student, "I see your name is

Sun. You are wanted here."

     What a surprise to hear that! Everybody knows if you are wanted by the police, you must have

broken the law. So he asked the policeman: "Is there anything wrong with my passport? Do I have to go

back to China right now?" "Go back?" shouted the policeman, "Now you are here, we'll never let you go

away." "What's happened? What have I done?" asked the Chinese student in surprise. He thought he was

going to be arrested.

     It was only then that the policeman began to smile.

     He said, "You don't know what you have done, Mr. Sun? You've brought sunshine to England. So

we don't want you to go away."

1. Where did the story take place?  [ ]

A. At a railway station.

B. At an airport.

C. In a school.

D. At a police station.

2. Mr. Sun was surprised because _____. [ ]

A. the police man took away his passport

B. there was something wrong with his passport

C. the police man was not happy

D. the police man asked him to come to him

3. From the passage we know that _____. [ ]

A. the weather was not fine in England all year round

B. the Chinese students aren't popular in England

C. the policeman was interested in Chinese name

D. Mr. Sun doesn't learn English well

4. The word "arrested" in the passage means _____. [ ]

A. 拘捕

B. 休息

C. 介绍

D. 通知

5. What will be the possible end of the story? [ ]

A. Mr. Sun lives in England for ever.

B. Mr. Sun was taken to the police station.

C. The police man said good-bye to Mr. Sun with a smile.

D. Mr. Sun and policeman will understand each other better.

Do you have trouble getting started in the morning? Do you have problems learning early in the day? If you do, you are not alone, _小题1:__ They learn better at night than they do in the morning.

To investigate when cockroaches(蟑螂) learn best, researchers at Vanderbill University tested the insects for which odor(peppermint 薄荷 or vanilla 香草) they preferred. Most cockroaches preferred the smell of vanilla to that of peppermint at all times. __小题2:__ Therefore, the scientists trained the cockroaches to prefer the peppermint smell by rewarding the insects with a taste of sugar water when they approached a peppermint smell. _小题3:__

When the cockroaches were trained at night, they remembered the new associations(peppermint＝sugar water; vanilla＝salt water) for up to 48 hours. However, if the cockroaches were trained in the morning, they quickly forgot which smell went with which water. __小题4:_

So, cockroaches learn better at night than they do in the morning. _小题5:_ Because of this, it is likely that information they gather at night will be more useful to them. These experiments provide some clues about the interactions between body rhythms, learning and memory.

A．When these insects moved toward a vanilla smell, on the other hand, they were punished with a taste of salt.

B．This result thus shows that the time when they were trained decided the effect of their learning.

C．They are often more active and tend to search for food during the night.

D．They were also found to like sugar water, but not salt water.E．Cockroaches have the same problem!

F．But they prefer warm conditions found within buildings.

G．Pest species adapt easily to their environment.

一位远视+3.00D的年轻患者，在注视33cm处的视标时，他要付出的调节是多少（）。

A.6.00D

B.7.00D

C.4.00D

D.5.00D

E.8.00D

培训师的角色有哪些

肱骨中段粉碎性骨折，选用哪种手术方法较好

A．加压钢板固定
B．髓内针固定
C．手法复位，夹板固定
D．普通钢板固定
E．骨牵引治疗