问题 问答题 简答题

计算题:某铸钢车间10t铸造天车,起升机构采用6×37—14—左交,在其磨损严重区段发现一个捻距内有13根断丝,问该绳是否可继续使用?

答案

参考答案:

钢丝绳总丝数为m总=37×6=222根

铸造天车吊钢水等危险品,其标准报废断丝数为m<sub>废</sub>=m<sub>总</sub>×10%×50%=222×10%×50%=11.1根

一个捻距内实际断丝数13根大于标准断丝数11根,故该绳应报废更换新绳。

阅读理解

阅读理解。

     People from other countries will find many different surprising things in Britain.

     Greek: A man from Greece sees a special way of driving in Britain. People drive on the left in the British

street, but the British people never feel surprised. The Greek man said,"I've been in Britain for nearly a month

now. But at first, I couldn't always remember to drive on the left. Every time, my friend reminded me."

     Japanese: Japanese people can't understand why British people keep their shoes on at home. In Japan,

people walk in the room without shoes. If visitor keeps his shoes on at home in Japan, the Japanese people

think he is very impolite.

     Spanish: The Spanish people mind the way that the British people greet each other. They themselves seem

to be afraid of touching (接触).When they meet, they just smile or nod but never kiss or hug (拥抱) in Spain.

But the British people think kissing is a very usual greeting when they meet!

     There is an old saying, "When in Rome, do as Romans do."When we go to a foreign country, we should

follow the etiquette of country.

1. The Greek visitor _______.

A. always drives on the left

B. used to drive on the left

C. drove correctly in Britain with his friend's help

2. _______ think it's impolite to wear shoes at home.

A. The Japanese

B. The Greek

C. The English

3. When greeting, the Spanish _______.

A. kiss each other

B. hug each other

C. smile at each other

4. _______ seem not to be afraid of touching each other.

A. The Spanish

B. The British

C. The Japanese

5. Etiquette in the world _______.

A. is the same

B. is important

C. is sometimes different and interesting

选择题