【单选题】【消耗次数：1】
正常工作的发动机，其机油泵的限压阀应该是
①
经常处于关闭状态
②
热机时开，冷机时关
③
经常处于溢流状态
④
热机时关，冷机时开
参考答案：
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相关题目
【单选题】
以下哪个原因会造成汽车的发动机暖机时频繁失速
①
怠速控制阀有故障
②
水套侧盖衬垫损坏、螺钉松动或螺钉未按规定顺序紧固
③
机体上的水堵封水不严
④
在天气炎热或高原地区起动汽车
【简答题】
起动发动机时,需要提供强大的电流,它是由[填空]提供的。
随机题目
【多选题】
_____________ , you are perfect in mind and body.
①
In time
②
In a word
③
In short
④
In sum
【多选题】
_____________ the bad weather, they did experiments on ways of storing solar energy.
①
Though
②
Although
③
Despite
④
In spite of
【多选题】
You speak ____________ you had really been there.
①
as soon as
②
as many as
③
as if
④
as though
【多选题】
I hope I can ________________ soon.
①
make my English better
②
make my English worse
③
improve my English
④
invent my English
【多选题】
_____________ , he began to write a report.
①
Finish the exploration
②
Having finished the exploration
③
The exploration finished
④
The exploration finish
【单选题】
The government enacted new laws to ________________ terrorism(恐怖主义).
①
fight for
②
fight against
③
fight in
④
fight at
【单选题】
Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people keep their anger inside. They can not or will not express it. This is called repressing anger. Many doctors think that repressing anger is more dangerous to a person’s health than expressing it. They say that when a person is angry, the brain gives out the same hormones (荷尔蒙) as that are produced during tense and nervous situations. They speed the heart rate and raise blood pressure, so the person feels excited and ready to act. Repressing these feelings will only make the feelings continue, and this can lead to many medical problems. To prevent these problems, these doctors suggest letting the anger out by expressing it freely. But recently some other doctors question this. They say that people who express anger repeatedly and violently become, in fact, more but not less angry. And this could cause medical problems. However, some doctors say that both repressing and expressing anger can be dangerous. They believe that those who express anger strongly may be more likely to develop heart diseases, and that those who keep their anger inside may face a greater danger of high blood pressure. Doctors say the solution is to learn how to deal with anger. The first step is to admit that you are angry and to recognize the real cause of the anger, and then to decide if the cause is serious enough to get angry about. If it is, do not express your anger while angry. Wait until your anger has cooled down, and express yourself calmly and reasonably. Doctors also say that a good way to deal with anger is to find humor in the situation that has made you angry, for laughter is much healthier than anger.What is the main idea of this passage?
①
Anger should be dealt with in a proper way.
②
Different people deal with anger in different ways.
③
Doctors suggest dealing with anger by repressing it.
④
The best way to deal with anger is to laugh when angry.
【单选题】
It is _____________ that today people in some remote areas know about the rest of the world.
①
difficult
②
amazing
③
inferior
④
superior