问题 问答题 简答题

桥式抓斗吊车正常运行时,若控制器立即打反档急刹车会产生什么结果?

答案

参考答案:

当桥式抓斗吊车正常运行时,若控制器立即打反档急刹车会由于车体重,惯性大产生很大的扭矩,损害传动系统,严重时会发生轴或破齿事故,致使电动机过载而烧坏等设备事故。所以在工作正常中除了特殊情况之外,不允许打反档急刹车。

阅读理解

阅读理解

     A large number of people in the world eat fast food. Whenever you go into a fast food restaurant,

you can see lots of people enjoying their meals there. How do you know in which country people like

fast food best?

     The English people are the world's biggest fans of fast food, while the French (法国人) are the least

interested in quick meals, according to a survey done last year.

     The survey of thirteen countries shows 45% of the English people say they can't give up fast food

because it's delicious. And 44% of Americans and 37% of Canadians say the same.

     The French, proud of their delicious and high-class cuisine, don't like fast food. 81% of them think it

is unhealthy, followed by 75% of the Japanese.

     How about the Chinese? How often do you have hamburgers or fried chicken? It doesn't matter

whether you like Western fast food or Chinese food. The most important thing is to keep a balanced

diet.

1. From the survey we know ________ like fast food best.

A. the Chinese

B. the French

C. Japanese

D. the English

2. The survey shows ________ of Americans like fast food.

A. 37%

B. 44%

C. 75%

D. 81%

3. According to the survey, some people can't give up fast food because ________.

A. it's cheap

B. it's safe

C. it's delicious

D. it's healthy

4. The word"cuisine"in the passage means ________.

A. food

B. house

C. water

D. country

5. The survey is about ________.

A. Western countries  

B. fast food  

C. restaurants in the world  

D.Chinese food

填空题