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简述EH油站工作原理。

答案

参考答案:

油泵启动后(最大流量约为100L/min),经过吸油滤器,从油箱中吸入抗燃油。从油泵出来后的压力油,通过流量计后经过油站出口组件,一路进入高压蓄能器,即向蓄能器充油;一路进入和该蓄能器相连的EH液压控制系统中。在充油过程中,系统流量会逐渐减少,油压开始升高。当油压到达泵的调整压力时,泵的变量机构起作用,并改变泵的输出流量,直到泵的输出流量和系统流量相匹配时,泵的变量机构便维持在某一位置,从而稳定系统油压在14.5MPa。当系统流量改变时,泵会自动调整输出流量。而在系统瞬间大油量时,供油则主要由蓄能器完成。对应于系统正常运行,泵的额定压力设置为14.5MPa。而当系统压力达到17±0.5MPa时,溢流阀将动作,起到过压保护作用。

阅读理解

阅读表达。

     Having one of those days or weeks when everything seems to annoy you? Even if you do nothing about it,

your bad mood will probably go away after some time. But with a little effort, you can forget it much faster,

often within a day or two. 

     ●Walk it off

     Exercise is the most popular way to remove bad mood. A person who's in a bad mood has low energy and

high tension. Taking a fast ten-minute walk, or taking some quick exercise can do wonders towards changing

that bad mood. 

     ●Tune it out

     Listening to your favorite music for a while can also make ten- sions go away quickly, because music starts

associations with past positive experiences we've had. 

     ●Give yourself a pep talk

     Stop and listen to what's on your mind. Bad moods are often started by too many negative thoughts. Write

them all down on paper, including the pessimistic messages you've been giving yourself and then give optimistic

answers. 

     ●Avoid things that won't improve your mood

     TV may not help much you need to increase your energy level and stimulate your mind. And before you

reach for that piece of cake and coffee, think about how _____ are linked. Sugar and caffeine contribute to

depressed moods while carbohydrates, such as potatoes and pasta (意大利面食), produce a calming effect in

people who have a desire for them.

1. What's the general idea of this passage? (Please answer within 10 words.)

    _____________________________________________________________________________________

2. Translate the underlined sentence into Chinese.

    _____________________________________________________________________________________

3. Please design a pessimistic situation and then find an optimistic solution,following the third suggestion.

    (Please answer within 20 words.) 

    Situation: _____________________________________________________________________________

    Solution: _____________________________________________________________________________

4. Fill in the blank in the last paragraph with proper words. (Please answer within 10 words.)

    _____________________________________________________________________________________

5. What do most people do to beat the bad mood according to the passage? (Please answer within 10 words.)

   ______________________________________________________________________________________

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