在宽带ISDN参考模型中，协议分为3个层面，这3个层面是A．控制面、连接面、用户面

阅读理解。

     Many people have, to work on the weekend. Some people do not mind. Other people think it is terrible.

One man thinks that working on the weekend can be dangerous. He is John Brown. Mr. Brown works in

an office in New York.

     On Saturday, May 24, 1986, he went to the office to do some work. When he got in the elevator to go

home, it stopped between floors. Mr. Brown could not get out of the elevator. He was trapped (困住)! He

started to shout, but nobody heard him. Then Mr. Brown remembered that it was a holiday in America.

Nobody was going to come to work until Tuesday! There was nothing for Mr. Brown to do.

     He had to wait until one of his coworkers (同事) came to work and found him. With nothing to eat

or-drink, Mr. Brown ended up sleeping for most of the time.

     Early on Tuesday morning, the president of the company came into work and found the elevator was

not working. When the elevator was opened, Mr. Brown came out cold, weak, and tired. He had been in

the elevator for sixty-two hours!

     Now Mr. Brown says, "I only use elevators if they have telephones in them."

1. What does Mr. Brown think of working on the weekend?

A. It is happy.

B. He doesn't mind.

C. It can be dangerous.

D. He refuses to do it.

2. How long was he in the elevator?

A. From Saturday to Monday.

B. From Tuesday to Saturday.

C. More than three days.

D. More than two days.

3. Why did Mr. Brown spend so long in the elevator? Which of the following is NOT a reason?

A. It was a three-day holiday.

B. He had no food or drink.

C. The elevator stopped between two floors.

D. There was no telephone in the elevator.

4. How was Mr. Brown able to get out of the elevator?

A. The president discovered the elevator wasn't working.

B. The elevator started to work soon again.

C. His coworker who worked on the weekend helped him out.

D. His coworkers found him when they came back to work on Monday.

5. What is the best title (题目) for this story?

A. A Busy Weekend

B. An Interesting Elevator

C. Trapped in an Elevator

D. Elevator Safety

Look! The duck is swimming ____________ the lake.[ ]

A. in

B. at

C. near

读图4—26，回答问题：(8分)

(1) 图中的褶皱是         ，其顶部缺失的原因是                        。

(2) 若该地区富含石油、天然气，则宜在甲、乙两处的         开采。原因

是                                             。(2分)

(3)图中②处以流水的       和       作用为主，③处以流水的       作用为主。

患者女，60岁。右侧肢体震颤，表情淡漠，步态不稳3个月。体检：双侧上肢静止性震颤，右侧肢体出现铅管样肌强直，肌力、反射、感觉均正常，慌张步态，以下哪种药物不能服用（）

A.美多巴

B.左旋多巴

C.苯海索

D.利舍平

E.溴隐亭

气温的日、年变化是由于地球自转引起的太阳高度角的变化造成。