问题 问答题 简答题

何谓未被平衡欠(过)超高?

答案

参考答案:超高值是根据平均速度算出的,当实际行车速度大于平均速度时,实设超高则偏低,出现离心力未被平衡的状态,称为欠超高;当实际行车速度小于平均速度时,实设超高则偏高,出现向心力未被平衡的状态,称为过超高。

阅读理解

阅读理解。

     Good evening, ladies and gentlemen:

     May I draw your attention to the "Safety in Flight" booklet, which you'll find in the pocket on the

back of the seat in front of you? We do ask you to read it. You'll also find a magazine, which you may

find interesting. Smoking is not allowed during the flight. If you have any questions during the flight, please do not hesitate (犹豫) to ask the two flight attendants. Would you now please ensure that your seat belts

are safely fastened in preparation for take-off? We wish you a pleasant flight. Thank you.

根据短文内容,选择正确答案。

1. When is the announcement made on the plane?

A. During the flight.                                          

B. Just before landing.

C. Shortly before taking off.                              

D. Shortly after taking off. 

2. Is smoking allowed during the flight?

A. Yes, but only during day flight.

B. Yes, but only in the toilet.

C. Yes, but only in a certain area of the plane.

D. No, it is not allowed.

3. What are passengers advised to do after they sit on the seat?

A. To read the signs.

B. To ask questions.

C. To read the "Safety in Flight" booklet.

D. To find out where they can smoke.

4. The word "fasten" means ______.

A. 穿上                      

B. 松开                        

C. 系紧                        

D. 加快

5. What can we know from the passage?

A. The plane is going to fly over land.

B. The plane is going to across the ocean.

C. Meals will be served during the flight.

D. The passengers will have a night flight.

解答题