There are several courses that can be taken in college, and now there are several courses in a semes

If you are asking about a degree, you can have a double degree, for example, my major is Chinese, and I can also study philosophy and get a double degree.

If it is a specific course, you can learn as much as you want, but the school has certain credit requirements for graduation, and you have to ensure that you can achieve it. However, if the final number of credits exceeds the required level, you may also have to pay a certain amount of tuition.

You can choose your major again at the end of your freshman year, but it seems that there are some requirements for grades.

Therefore, in your freshman year, you must seize the opportunity, don't look at the classmates around you are playing, addicted to the Internet, you also follow the crowd, college is an ivory tower, but in the end we still have to return to society. Don't think that if you pass the college entrance examination, you don't have to struggle. Because you don't just want to make yourself happy for four years, but you want to live your life without regrets.

You can minor in one major by yourself, if you want to get a degree certificate in both majors, then you have to pay the tuition fees for both majors, and then strictly take the exams of both majors, and register for both majors in your electronic student status at the same time, if you just want to learn the knowledge of another major, and do not want to get a degree certificate, you don't have to pay the fee

The major is determined as soon as you enter the school, and the curriculum is basically determined, and generally the school will have some places to allow top students to transfer to other majors in the sophomore year. If you miss this opportunity, you can choose to minor in a second major.

Some schools will offer a second major, and as long as you complete the credits of the main courses specified in the second major, you will receive a certificate of completion of the second major.

The situation of the same major in different universities is different, and different majors in the same university are also different, even if the number of subjects is the same, but because of the different amount of content, the number of classes is also different.

For example, in medical school, for 5 years of clinical practice and other small majors in medical school, the classes of the fifth day are fuller, and there are generally 2 more classes per day.

As far as the freshman year is concerned, general education courses (that is, the meditation that every major has to learn, modern history, and elective courses, VB or C language), of which there are about 2 or 3 subjects per semester, and the others are basic courses and professional courses, and these courses are generally arranged with a large amount of courses.

Generally, the first semester is 20 weeks (the difference between different universities is generally about 3 weeks, many good universities have a longer study time, my classmates at Tsinghua University came back on the 24th and 5th of the lunar month during the Chinese New Year), the second semester is 19 weeks (if there is a small semester, it may be 16 weeks), and some universities also arrange a small semester (20-30 days) during the summer vacation, such as some majors in Shandong University and some in Dalian Institute of Technology.

Generally according to the credits, different subjects according to the country's focus and relative to your major are different, there are differences between credits, such as meditation, Marxism-Leninism, etc. are national key subjects, so the credits are very heavy, all majors are the same, unless your school is private, there are very few in China, and no one is willing to go to it. Of course, the credits of professional courses are the heaviest.

Of course, if the major has a lot of class hours, the number of class hours to a certain extent is directly proportional to the number of credits.

If your college credits are relatively low, you need to take a few more courses, if your credits are normal, you can generally take one or two elective courses in a semester, depending on your actual situation.

In addition to choosing the subjects that we are personally interested in, we also need to look at the credits of each elective course, and then choose the elective courses with reference credits, which is also beneficial for us to graduate from university after completing the credits.

Hello, I'm honored to answer for you, undergraduate students are divided into professional courses and basic courses during college, and there are generally about 24-30 courses in total. The courses of Daqing Hanxue are divided into two categories: compulsory courses and elective courses. Electives are further divided into two types: restricted electives and non-restricted electives.

If it is divided by major, it is a public course and a professional course, and the two can be intersected. Compulsory courses are relative to "elective courses". In its original sense, it is a course that must be learned and mastered in the course of study, and it is very important.

For example, in university studies, philosophy is a compulsory course; There are also courses in some national exams, such as "speaking" in English level 4 as a compulsory course. The implications are very broad. Major Compulsory Courses for Undergraduate Students:

Ideological and Moral Cultivation, Marx's Principles, *** Theories and Concepts, English, Modern Chinese History, etc., Military Theory, Professional Courses, Physical Education. Hopefully mine can help you <>

1. Quality education courses.

There is a wide range of quality education courses. For example, the military training for freshmen is actually a national defense education course. In some normal colleges, you also have to take classes on three strokes, Mandarin speaking training, teaching methods, and so on.

Generally speaking, most colleges and universities will also offer career planning courses and employment guidance courses.

2. Public Classes.

There are many public courses to be taken in college, first of all, college English, ideology and politics, computer, physical education, legal foundation, ideological and moral cultivation, etc., these courses are required by all students in the school, no matter which major you have. This is followed by mathematics courses for science and engineering majors, college physics, etc., and college language for liberal arts majors. The school will arrange the courses according to the direction of your major.

Normal students generally have to study pedagogy and psychology, which is also a public course.

3. Professional courses.

This should be the most and most core lesson. Generally, it is taught by professional teachers from the faculty (department), which is also the most core course. These courses should systematically learn the knowledge of the major they have studied and lay the foundation for their professional ability.

In addition to theoretical classes, science and engineering courses also require practical training courses. In addition, students of all majors are required to participate in internships, which are generally considered practical courses in their junior year. In the year of graduation, you have to complete a **, which will be guided by the instructor, which belongs to the academic practice course.

4. Elective courses.

The range of elective courses is also very wide, some are related to the major, and some are very low-related, belonging to the quality development of courses. Some elective courses are taught face-to-face, while others are taught online.

The university's courses are divided into two categories: compulsory courses and elective courses, and elective courses are divided into two types: restricted electives and non-restricted electives. If it is divided by major, it is a public course and a professional course, and the two can be intersected. Public courses are divided into public compulsory courses and public elective courses, public compulsory courses include Introduction to Thought, Ideological and Moral Cultivation, Physical Education, College English, etc., and public elective courses involve various majors, which are non-restrictive, and you can choose enough credits.

It mainly depends on your major.

The basic course of study is the basic course and professional course of the major, plus elective courses.

Engineering majors generally take courses such as advanced mathematics, probability theory, linear algebra, and college physics.

In addition to professional courses, I will study some college English, as well as courses such as advanced mathematics, college sports, and introduction to entrepreneurship, all in order to enrich my college life and make my life more fulfilling.

The courses studied in the university are related to the major, and some compulsory courses are required for all majors, such as the Outline of Modern Chinese History.

It depends on what major you are studying, but there are generally Mao, Chinese, and mathematics.

Public courses and professional courses, professional courses are divided into elective and compulsory courses, different majors, different course arrangements.

The courses during the university are arranged according to the chosen major, and the courses are different for each major, except for the common courses.

It depends on what major you are, and there are generally basic courses and professional courses.

The course of university study is very extensive, and it depends on what kind of major you study, so you must experience your own study plan.

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.

For some people who take the college entrance examination this year, college life is very longing, because many people have mentioned that college is very beautiful and college is very easy. But there are a lot of classes in college, and many people are curious about what courses are taken in college and what role it hasToday, I will introduce the courses that need to be mastered in college.

Have you ever heard of a saying as a high school student that college has a few classes a day, a few classes in the morning, a few classes in the afternoon, and even sometimes one or two classes in the morning, but you should not forget that the object of college classes is different from that of middle and high school. In college, there are large classes, which are two hours per class. There are two classes in the morning, but don't forget that two classes are also one morning.

As for what courses to study in college, this needs to be discussed by major, **Engineering for example, science and engineering are partial to mathematics, such as advanced mathematics, college physics and. Complex variable functions are written as algebra, etc.

These courses are all more difficult, and some people give a statement. When you go to college, you will see a tree called High Mathematics, and there are many people hanging on the tree. And then there is a grave next to it, and he is calculus, which is a very vivid metaphor for high mathematics, and the subject of high mathematics is really difficultFor the average college student.

Generally, dozens of courses are studied in four years, and there are many or fewer courses in different majorsIf you choose the computer science major and big data major, which are more popular now, then you will have a lot of courses. Then I'll give you an exampleI have 25 full classes a week, and sometimes they can reach 28-29 full classes for computer science majors. Labs, classes are held on Saturdays, Sundays, or in the evenings.

Generally, in the freshman year, the sophomore year has relatively few courses, because the freshman and sophomore years are biased towards the basics, the third and fourth years are the real professional courses. Professional courses must be learned well, because they will be linked to your future work, and these professional courses are often a lot, sometimes you need to master dozens of courses in four years.