问题 问答题 简答题

说明一下高旁快开的条件。

答案

参考答案:

前提条件是汽机在高缸运行;发生快开条件前一时刻的调压值大于30%;没有高旁快关信号。在上述三个条件满足的情况下,当BPC接受到如下信号时高旁快开:

汽机跳闸;发电机解列(主开关);汽机超速;甩负荷带厂用电及局域网工况。

高旁快开时通过动作就地的快开电磁阀,根据不同的调压信号发不同脉冲长度的信号,实现不同的快开位置,快开的瞬间指令根据预先设置的开度跟踪,快开结束后进入压力或温度调节方式。

阅读理解

阅读理解。

     Dreams are expressions of thoughts, feelings and events that pass through our mind while we are sleeping.

Everybody dreams. But only some people remember their dreams. Our dreams often include all the senses-smells, sounds, sights, tastes and things we touch. We dream in colour. Sometimes we dream the same dream over

and over again. These repeated dreams are often unpleasant. They may even be nightmares-bad dreams that

frighten us.

     Early in the twentieth century, two famous scientists developed their personal ideas about dreams.

Austrian psychiatrist Sigmund Freud published (出版) a book called "The Interpretation (诠释) of Dreams"

in 1900. Freud believed people often dream about things they want but can't have. These dreams

often have something to do with sex and aggression (侵犯行为). Swiss psychiatrist Carl Jung worked

closely with Freud for several years, but he believed dreams could help people grow and understand

themselves. He believed dreams provide solutions (解决办法) to problems we face when we are awake.

He didn't believe dreams hide our feelings about sex or aggression. Today we know more about the science

of dreaming because researchers can take pictures of people's brains while they are sleeping.

     Other researchers are studying how dreaming helps our bodies work with problems and very sad emotions. Robert Stick gold is a professor of psychiatry at Harvard University in Massachusetts. Doctor Stick gold says

that when we dream, the brain is trying to make sense of the world. He does not agree with Sigmund Freud

that dreaming is the way we express our hidden feelings and desire (愿望).

      Scientists believe it is important to keep researching dreams. Doctor Stick gold says it has been more than

one hundred years since Sigmund Freud published his important book about dreaming. Yet there is still no agreement on exactly how the brain works when we are dreaming or why we dream.

1. Dreams _____.

A. are remembered by everyone

B. express all that we think in our mind

C. include few senses and things we touch

D. are sometimes nightmares that repeat and frighten us

2. A book on dreaming was published by _____.

A. Sigmund Freud

B. Robert Stickgold

C. Carl Jung

D. the writer

3. In the passage, all the psychiatrists _____.

A. believe dreams can help people understand all the problems that they face

B. think dreams always hide someone's feelings about sex or aggression

C. study dream and dreaming and have their own ideas

D. have the same idea that people often dream about the things they want

4. From the passage, we know that _____.

A. Jung thought that dreams provide solutions to problems we face when we are sleeping

B. Freud developed the idea that dreams are expressions of people's hidden feelings

C. scientists have known quite well why we dream because they can take pictures of our brains

D. other researchers have discovered how dreaming helps our bodies work with problems and

     very sad emotions

5. Which would be the best title for the passage?

A. The Explanations of Dreams.

B. The Ways of Dreams.

C. The Solutions to Dreams.

D. The Mystery (奥秘) of Dreams and Dreaming.

单项选择题 A1型题