问题 问答题 简答题

压力测点位置的选择应符合哪些规定?

答案

参考答案:

压力测点位置的选择应符合下列规定:

1)测量管道压力的测点,应设置在流速稳定的直管段上,不应设置在涡流的部位。

2)压力取源部件与管道上调节阀的距离:上游则应大于2D;下游应大于5D(D为工艺管道内径)。

3)测量低于0.1MPa的压力的时,应尽量减少液柱引起的附加误差。

4)炉膛压力取源部件的位置锅炉厂规定,宜设置在燃烧室中心的上部。

5)锅炉一次风管或二次风管的压力测点至燃烧器的管道阻力应相等。

6)中储仓式制粉系统磨煤机前、后风压的取源部件,前者应装设在磨煤机入口颈部,后者应装设在靠近粗粉分离器的气粉混合物管道上。

7)汽轮机润滑油压测量点选择在油管路末段压力较低处。

阅读理解

When someone has deeply hurt you, it can be extremely difficult to let go of your anger. But forgiveness is possible—and it can be surprisingly helpful to your physical and mental health. Indeed, research has shown that people who forgive report more energy, better appetite(胃口) and better sleep patterns. “People who forgive show less anger and more hopeful,” says Dr. Frederic Luskin, who wrote the book Forgive for Good. “So it can help save on the wear and tear on our system and allow people to feel more energetic.”

So when someone has hurt you, calm yourself first. Take a couple of breaths and think of something that gives you pleasure: a beautiful scene in nature, someone you love. Don’t wait for an apology. “Many times the person who hurt you may never be thinking of apologizing,” says Dr. Luskin. “They may have wanted to hurt you or they just don’t see things the same way. So if you wait for people to apologize, you could be waiting a very long time.” Keep in mind that forgiveness does not necessarily mean accepting the action of the person who upset you. Mentally going over your hurt gives power to the person who brought you pain. Instead, learn to look for the love, beauty and kindness around you. Finally, try to see things from the other person’s perspective(视角). You may realize that he or she was acting out of ignorance(无知),fear—even love. To gain perspective, you may want to write a letter to yourself from that person’s point of view.

小题1:The text is mainly written to explain ___.

A.how to keep yourself from being hurt

B.how to stay mentally healthy

C.how and when to remain calm

D.why and how to pardon others小题2:According to the writer, what is the right way to calm down after being hurt?

A.Try to figure out why you get hurt.

B.Write a letter to the person who hurts you.

C.Persuade yourself to accept what others have done to you.

D.Think about pleasant things and forget about the hurt.小题3:Dr. Luskin advised us not to wait for an apology after being hurt because___.

A.we are not patient enough

B.we’d feel worse accepting other’s apology

C.people seldom want to apologize

D.people don’t mean it when they apologize

单项选择题