Is it good for elementary school students to always show that they help teachers do things?

The fact that the pupil is good at expressing himself and letting the teacher know his strengths, and that she is willing to help the teacher with his work, shows that he is a helpful person, which is very good.

Discharge cooling is another type of convection cooling. Unlike regenerative cooling, the coolant used for exhaust cooling absorbs heat to the thrust chamber and is discharged out of the combustion chamber instead of entering the combustion chamber to participate in combustion. Direct drain coolant reduces the thrust chamber specific impulse, so the coolant flow for drain cooling needs to be minimized while only using drain cooling at the outlet section of the nozzle that is relatively less heated.

There is also radiative cooling, in which the heat flow is transferred from the combustion products to the thrust chamber, and then the heat is radiated by the thrust chamber wall to the surrounding space. Radiative cooling is characterized by simplicity and small structural mass. It is mainly used in the extension section of large nozzles and the thrust chamber of small thrust engines using high-temperature resistant materials.

When cooling in the thrust chamber of the tissue, a relatively low temperature liquid or gas protective layer is established on the surface of the thrust chamber wall to reduce the heat flow to the thrust chamber wall, reduce the wall temperature, and achieve cooling. Internal cooling is mainly divided into three methods: internal cooling (shield cooling), membrane cooling and diaphoretic cooling of head tissues. After the internal cooling measures are adopted in the thrust chamber, the mixing ratio near the wall of the combustion chamber is different from the optimal mixing ratio in the central area (in most cases, the near-wall layer rich in fuel is used) due to the need to reduce the temperature of the protective layer, resulting in the uneven distribution of the mixing ratio along the cross-section of the combustion chamber, so that the combustion efficiency is reduced to a certain extent.

Membrane cooling is similar to shield cooling in that it cools the thrust chamber wall by establishing a uniform and stable coolant film or air film protective layer near the inner wall surface, except that the coolant used to establish the protective layer is not injected by the injector, but is supplied through a special cooling belt. The cooling band is generally arranged in a cross-section of the combustion chamber or the convergence section of the nozzle. There can be several cooling bands along the length of the combustion chamber.

In order to improve the stability of the membrane, the coolant often flows through the gaps or small holes in the cooling belts, and when sweating is used, the thrust chamber wall or part of the inner wall is made of porous material with a pore diameter of tens of microns. Porous materials are usually sintered with metal powders or pressed with metal mesh. In this case, the number of pores per unit area is increased by making the micropores in the material as evenly distributed as possible.

The liquid coolant penetrates into the inner wall, creating a protective film that reduces the density of the heat transferred to the wall. When the flow rate of liquid coolant used for sweat cooling is above a certain threshold, a liquid film is formed near the wall of the thrust chamber. When the coolant flow rate is below the critical flow, the inner wall temperature will be higher than the coolant boiling point at the current pressure, and some or all of the coolant will evaporate, forming an air film.

In addition to the above thermal protection, there are other thermal protection methods such as: ablation cooling, thermal insulation cooling, hot melt cooling and composite protection of chamber walls. 3. Thermal protection scheme of high enthalpy gas generator Based on the above methods and the actual situation, the thermal protection method of high enthalpy gas generator is obtained.

The combustion chamber of a high-enthalpy gas generator differs from that of a liquid rocket engine, eliminating the front thrust chamber part, making its structure simpler and more effective. Then, the thermal protection involved is the thermal protection part of the combustion chamber wall. As the fuel enters the combustion chamber, it quickly decomposes and releases large quantities.

I think it's a good thing, it can exercise children's hands-on ability, which is beneficial to children's growth.

It's a good thing. It can not only exercise hands-on ability, but also have more opportunities to get along with teachers and children, and improve communication skills.

This is to be courteous, but also want to show their own performance, this kind of performance hopes to be recognized by the teacher and other students, is a competitive performance, is a good performance, needs encouragement, can come in shifts, of course, who performs well, can hold 2 more times, they will be proud of this, but they need to enlighten them, can not take this thing as a show off capital, there are many ways to contribute to the class collective, can reflect their own value.

There is no good or bad, helping the teacher can make the teacher have a good impression of you, but in college, students are in charge of students, and they can't be said to care. It's that the teacher is rarely involved in the affairs of the class. If you want to be a class leader, it's best to do more practical things for your classmates.

So that everyone can trust you, that time of election. Everyone knows it.

That's how college is, if you take the initiative to do something, the teacher will appreciate you, but your classmates may not appreciate you, and they will think that you are a teacher, but it doesn't matter, what matters is your own future and destiny. Generally speaking, proactive people are easy to join the party, easy to have a good relationship with teachers, get high scores, and easy to have what good counselors think about you.

I've got your back!

So so. The registration of new students is prepared by teachers and seniors, and if you go early, the seniors will take you to familiarize yourself with the environment.

As for the class cadres, it is still mainly democratic voting, and the university is no longer the teacher who says that the student with good grades and good performance is the one who is the one, that is the practice of primary and secondary schools, and in the university it is necessary to run for election and give speeches, and more than half of the students in the class must vote to be elected.

It's okay to help the teacher, and the hard work of being a class cadre is not to do things for the teacher, but to do things for the students in the class. College students are not like elementary school students anymore, who does well and poorly, you can see clearly.

Temporary class work can go to school to do things first

Moreover, the temporary class cadres have been selected by the school

Will there be someone to receive if you go by yourself?

Talk to your classmates and ask your friends why you have a good relationship.

Remember one thing, don't enhance competitiveness

It's best to talk to your teacher.

Ignore them, they're graduating anyway.

It's their prejudice, just ignore it.

You're very contrived, like pleasing the teacher.

Isn't it a 9th grade graduate? Is your primary school a six-year school?

I studied psychology.

This kind of question was asked in class, saying that if such a child deliberately attracts your attention, all you have to do is to pretend that you don't see it, so that after he has not received a response many times, he will eliminate these actions.

But personally, I don't feel like it's humane. It's okay to do this with animals, but people have feelings, and it's a bit cruel to do so.

So you should still ask his parents, listen to the tone of the landlord, the child should not be big. Therefore, at this time, his own world values have not yet been established, and if he is simply asked, he may not be able to solve it too well. If you ask your parents, you should be able to get some information.

If it doesn't work anymore, you still have to start with the child.

But there is another very likely reason for this behavior at this age, which is ADHD in children, which is absolutely possible and must not be ignored. If both parents and teachers intervene unsuccessfully, then you can go to the hospital for an ADHD evaluation. The smaller ADHD** it is, the less harmful it is when you grow up.

Hope it helps the landlord.

Such a child may be lonely, if not, and you teach middle school, then you have to be careful, then the child may have a crush on you, like you, in order to get your attention, even if you scold him, he is willing to help, willing to adopt.

Caring about him, he just feels that he is not being taken seriously.

The teacher should ask him why at the end of class.

Children love to give small reports to teachers at school, and I think this is a bad thing. Although the small report can get the teacher's attention and praise, but at the same time it will also damage the interests of the classmates, if the long-term past, the students will slowly alienate such people, in the school we must be a good student, but not necessarily to hit other people's small reports, this is actually a measure of the practice, and it is easy to offend classmates, hurt each other's friendship.

I think it's a bad behavior to like to make a small report, some children do this, is to attract the attention of others, but this is also easy to develop jealousy, if you find that your classmates have really made a major mistake, then you can tell the teacher in time, but if you find that it's just some small problems, I don't think it's necessary to make a small report to the teacher, which seems to be very unmeasured, and as a teacher, you will also distinguish between right and wrong, if you always like to distort the facts when you make a small report, Then the teacher does not like such students either.

People who love to play small reports are always narrow-minded, because in their eyes can not see the excellence of others, but at the same time can not see the faults of others, after discovering other people's mistakes and secrets, immediately go to tell teachers and parents, they hope to get the attention and praise of others in this way, but it is very detrimental to the future development, as the saying goes, the prime minister can hold the boat in his belly, and he should let his children develop good habits from an early age.

Many children like to play small reports, but parents should also establish a correct value and social outlook for their children, first of all, let the baby know that they must do a good job in order to criticize others, if they are all sick, then they are not qualified to play other people's small reports, but also to let the baby maintain an optimistic and open-minded attitude, to learn to be independent, do not care about everything, let alone to say bad things about others behind their backs, and learn to get along with classmates.

Is it a good thing that children love to give small reports to teachers at school? It's not a good thing, it's definitely a bad thing, why do you say that? Because the child's mind is not used to study, but focuses on what is happening to others, so when distracted, the child must be taught not to care about other people's affairs.

No, such children may not be able to get along well with others, and may become very tricky and not have a particularly good personality.

This is not a very good thing, because such children are often easily excluded by their classmates, and sometimes their popularity will be bad.

It's not a good thing, it's a particularly bad habit for children, and if it goes on for a long time, it will cause others to resent it.

It's not a good thing, it will expose the child to some ostracism, it will make the child a person who many people hate, and it is better not to do it.

No. Such behavior of children should be corrected, such children are very selfish and cannot treat some people fairly.

I don't think this is a good thing, because the child is always making small reports, and maybe the teacher will have an opinion about the child.

Introverts will often look at the teacher during class, and extroverts will often ask the teacher questions, chat with the teacher, etc.

Very obedient and polite!! During the holidays, a gift or a greeting of concern is given

I hope to see the teacher every day, hope that the teacher will teach him, and be willing to learn the lessons taught by the teacher.

Loved taking this teacher's lesson.

First of all, don't be in a hurry, you need to take your time. Secondly, "love to speak in private and make small moves in class" is not a big problem, as long as the guidance is correct, he will not "teach repeatedly and do not change".

"Repeated teachings do not change", it can only mean that we have not found a good prescription for the case, or the child has not been qualitative.

Excuse me: Does your child have a time when he "doesn't talk privately in class" or "doesn't engage in small actions"? Did he have a time when he talked privately and made small gestures less frequently in class with the help of the teacher or you? If there is, praise it in a timely manner.

Children's education should focus on praise and encouragement, rather than sarcasm.

Primary school and junior high school are mainly to cultivate students' good behavior habits, so it is normal for children to be naughty at this age, as long as teachers and parents guide more, there will generally be no problems.

And I also want to tell you that the common people have a saying that "if you don't rub when you are young, it's useless when you're older" - his "rubbing" is the embodiment of his intelligence!

I wonder if it helped you?

Since he has been taught repeatedly, he must be restrained by school rules and discipline.

Teachers and parents should discipline him strictly and make him understand the importance of following school rules and discipline. This will allow him to correct his mistakes and concentrate on his studies. Good for him in the long run!

In fact, when they were students, cheerful students would talk a little bit in class, but the environment affected people, and in a relatively quiet environment, they would be quieter, and if others didn't say small words, they would be embarrassed not to talk about it.

Your child is a typical inattention deficit that can be improved by some small habits in daily life: 1. Training through language and intonation2. Don't disturb your child while they're learning3. Maintain a safe environment4. Create an atmosphere for your child.

It's a habit. For example, if you are interested in the content of the class, and the teacher is also interesting, you must be very serious and can't speak and make small movements, right? However, many classes may have such and such problems, some are their own, some are teachers', and some are even knowledge itself, and there may not be many people who can sit still in a class.

I thought you should start with the classes you like, gradually cultivate your interest in other classes, pay more attention to the teacher's guidance and questions during class, and think less about things that are not related to the class, maybe you can gradually become serious.