问题 问答题 简答题

在什么情况下,压力容器可以允许不设置检查孔?

答案

参考答案:

容器若符合下列条件之一,则可不必开设检查孔:

①筒体内径小于等于300mm的压力容器;

②容器上设有可拆卸的封头、盖板或其它能够开关的盖子,其封头、盖板或盖子的尺寸不小于所规定检查孔的尺寸;

③无腐蚀或轻微腐蚀,无需做内部检查和清理的压力容器;

④制冷装置用压力容器;

⑤换热器。

阅读理解

阅读短文,根据其内容回答问题。

    Many people have jobs. They go to work nearly every day. Some people are lucky. Either they have

very interesting jobs or they make a lot of money Most people are not so lucky. Either their jobs are not

very interesting or they don't make much money. 

    The most interesting jobs are often the most difficult. People take a long time to learn how to do them.

Doctors study for at least six years after finishing school. 

     Some young people have interesting and high-pay jobs. Many young players do their work successfully.

Football and tennis stars are usually under 35 years old. Older people usually can not play these sports very

well. They cannot move fast enough. Golf, however, is a good sport for older people. Many golf players

are quite old, but they can play it successfully.

     Most people work until they are 60 or 65 years old. Then they retire (退休) and have a lot of free time.

Some people never retire though. These people usually have very interesting jobs Writers, artists, scientists

and actors (演员) usually work until they die. Their work is their life.

1.Do most people have interesting and high-pay jobs?

     ______________________________________________________________________________

2.Why do some jobs have to be taken a long time to learn?

     ______________________________________________________________________________

3.What sports are young people good at?

     ______________________________________________________________________________

4.Why is golf a good sport for older people?

     ______________________________________________________________________________

5.When do some people who have interesting jobs retire?

     ______________________________________________________________________________

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