Start as a top student and move towards the stars and the sea

Thinking of this, Ning Chen felt that this was indeed very possible.

Compared with physics and chemistry, mathematics is a more purely theoretical subject and does not require any experiments.

But physics and chemistry are different. Many physics and chemistry theories and formulas are derived on the basis of experiments.

In the process of self-study before, Ning Chen had not participated in any experiments.

Even though Ning Chen's powerful brain could understand the principles of the entire experiment through data, there were many things that experiments could not replace.

How about entering the laboratory in advance and trying a learning method that combines theory and experiment?

After making the decision, Ning Chen got in touch with Xu Zhou.

Knowing Ning Chen's thoughts, Xu Zhou first asked:

Ning Chen, how have you been studying in your materials major these days?

Xu Zhou didn't want Ning Chen to enter the laboratory so early. After all, Ning Chen had only read books for a few days. If his foundation was too poor, he would have to explain everything by himself when entering the laboratory.

I have probably learned a little more than half of the professional knowledge, but I feel that I have reached a bottleneck. Maybe it would be better to be exposed to experiments earlier.

Seeing what Ning Chen said, Xu Zhou couldn't refuse directly.

In this case, Ning Chen, please come over here first. I will get to know your study situation, and then I will decide whether it is suitable for you to enter the laboratory now.

Okay, Teacher Xu, I'll be there right away.

After hanging up the phone, Xu Zhou's impression of Ning Chen dropped a lot.

In a few days, you can complete more than half of the undergraduate professional courses by yourself? What a joke!

As a teacher majoring in materials, Xu Zhou naturally knows how much knowledge there is in materials courses at the undergraduate level.

A normal undergraduate student would need about two years to complete all professional courses.

Although students have to learn more than just professional courses in the past two years, even if the time is compressed, it is difficult to master all professional courses in less than a few months.

No matter how talented Ning Chen was in learning, there was no way he could finish half of the courses in just a few days.

Xu Zhou thought that after a while Ning Chen would come over and give Ning Chen a few random questions so that Ning Chen would quit before he saw the difficulties, so that he could send him back to study for a period of time.

Ning Chen arrived at the laboratory soon and greeted Xu Zhou politely.

Xu Zhou didn't show his opinion of Ning Chen just now, and asked Ning Chen to sit down politely.

Ning Chen, I know how you want to enter the laboratory as soon as possible, but you also know that our experiments are not simple physical and chemical experiments and have certain thresholds.

“Without sufficient professional knowledge, many experiments are difficult to perform, and may be dangerous due to some misoperations.”

In this case, let me test you with five questions first. If you can answer three correctly, I will promise that you can enter the laboratory for internship.

Ning Chen knew that Xu Zhou might not believe that his learning progress was that fast, but Ning Chen was confident that as long as the questions asked by Xu Zhou were not too difficult, he was still confident that he could answer them.

Teacher Xu, are the questions you asked in the exam related to undergraduate studies?

Of course, I won't embarrass you.

Seeing Xu Zhou say this, Ning Chen felt relieved.

In fact, Ning Chen had not just read half of the information, but had already briefly read all the information. However, Ning Chen had not thoroughly studied nearly half of the information.

Okay, Teacher Xu, please ask.

Xu Zhou didn't want to make Ning Chen look too embarrassed, so he asked Ning Chen a relatively simple question first.

How many common lattices are there in metal crystals?

Hearing this question, Ning Chen was stunned for a moment, and then answered:

“There are body-centered cubes, face-centered cubes, and close-packed cubes.”

Ning Chen was stunned for a moment, not because he didn't think of the answer right away, but because he didn't expect the first question Xu Zhou asked to be so simple.

Such simple knowledge can be remembered by Ning Chen at a glance.

Hearing Ning Chen's answer, Xu Zhou also nodded.

Although this question is simple, it at least proves that Ning Chen has been reading seriously these days.

After all, Xu Zhou did not assign any scope to Ning Chen before asking the question. He just asked the question casually from the huge knowledge system of materials science.

But Xu Zhou was not going to let Ning Chen answer the next question easily.

Yes, the first question is answered correctly. Next question: What is fine grain strengthening? Two measures for refining grains are given.

This time, Ning Chen did spend a few seconds thinking. After all, the study in the past few days was a bit hurried, and the entire knowledge system was not very clear yet.

Of course, Ning Chen quickly searched for the answer to the question in his mind.

Fine-grain strengthening is a method of improving the mechanical properties of materials by refining the grains. Common refinement measures include modification treatment, increasing the cooling rate, vibration and stirring, etc.

Ning Chen realized that he had mentioned one more way to refine his energy, but there should be no points deduction for promising too much.

Xu Zhou was really surprised to hear that Ning Chen answered his question correctly again.

Xu Zhou knew that even if the same question was asked to an undergraduate who had completed professional courses, he might not be able to answer it accurately.

Ning Chen answered two questions correctly in a row, which forced Xu Zhou to temporarily come up with a more difficult question.

What are the characteristics and differences between body-shaped polycondensation reaction and linear polycondensation reaction?

Even if this question is placed among the postgraduate entrance examination questions for materials majors, it is considered a relatively difficult question.

There are only a few students among the candidates who can answer such difficult questions.

Xu Zhou didn't want to deliberately embarrass Ning Chen, but if he asked Ning Chen to answer one more question correctly, he would really have no reason not to let Ning Chen enter the laboratory.

After thinking briefly for a few seconds, Ning Chen replied:

From the perspective of the monomers participating in the reaction, at least one monomer in the body-shaped polycondensation reaction has three or more energies, while the monomers in the linear polycondensation reaction have two functionalities.

Judging from the structure of the obtained product, linear condensation polymerization produces soluble linear molecules, and body-shaped condensation polymerization produces insoluble body-shaped molecules.

The body shape polycondensation reaction increases as the degree of reaction increases, and the reaction is divided into three stages: A, B, and C...

Ning Chen answered the whole question very fluently. If Xu Zhou hadn't asked this question casually, Xu Zhou might have thought that Ning Chen had known the question in advance and memorized the answer.

Seeing that Xu Zhou was stunned and didn't speak, Ning Chen tried to ask:

Teacher Xu, what about the remaining two questions?