问题 问答题 论述题

如何对压力(差压)变送器进行密封性检查?

答案

参考答案:

平稳地升压(或疏空),使变送器测量室压力达到测量上限值(或当地大气压力90%的疏空度)后,切断压力源,密封15min,在最后5min内通过压力表观察,要求其压力值下降(或上升)不得超过测量上限值的2%。差压变送器在进行密封性检查时,高低压力容室连通,并同时引入额定工作压力进行观察。

阅读理解

“The only thing holding you back is yourself. Never say never”, said a rising 17-year-old singer, Justin Bieber, who was just an ordinary boy in Canada a few years ago.

After the accident of falling from the 18th floor and lying in the snow for three hours, my hands were frozen and my spinal cord (脊髓)was seriously injured. All the doctors and professors in the famous hospitals in Beijing told me that there was little chance for my hands and my body to recover (康复).

After half a year of medical treatments and recovering exercises, I could not make any more progress for over a year. What was worse , I suffered a lot from depression (绝望). On top of this, I suffered from insomnia, making every minute of the night seem to last forever. Hopelessly, mom and I came back to my hometown, which is small town in Guangdong.

At that time, I thought that I would never be able to walk again. I would never love and be loved. I would never be able to earn even a penny. I would never be able to repay the kindness I got from my parents and many nice people. Life was meaningless.

Now two years has passed. My hands are 80% recovered. I can even type faster than a healthy person! Up to now, I have worked for a law firm as an interpreter for half a year already. Although I don’t earn as much as before, I am able to pay for the food and clothes I need. What’s more, I even have extra money to buy thanksgiving presents for my parents and my boyfriend. Through my blogs (博客) , many people get to know me and like me. I can bring happiness to them. I can help those who are still suffering from depression and the pain of illnesses by chatting with them….You see, I am living a meaningful life and I am happier than ever I could have dreamed.

So, my friends, never say never. As long as you are alive, there is always hope and possibilities. It is never too late to take action to realize your dreams.     (382 words)

小题1:What’s the writer’s present job?

A.A singer.

B.A typist .

C.A professor .

D.An interpreter.小题2:What does the underlined word “insomnia” in the third paragraph mean in Chinese?

A.失眠

B.失忆

C.麻木

D.低烧小题3:All of the following words can be used to describe the writer’s present life EXCEPT___________.

A.helpful

B.meaningful

C.painful

D.hopeful小题4:According to the passage, which of the following statements about the writer is TRUE?

A.She gets a lot of help through her blogs.

B.She is in love with a young man at present.

C.She got medical treatment soon after the accident.

D.She had no job and earned little before the accident.

多项选择题