Xu Xingguo was slightly stunned, and said suspiciously: "All the exams at one time?" Professor Pang, have you studied all these professional courses by yourself? ”

Pang Xuelin nodded with a smile and said, "Almost." ”

The courses listed by Xu Xingguo are the basic courses for training a material science researcher, and Pang Xuelin has been in the wandering earth world for more than 20 years, and these basic professional knowledge has long been integrated.

For him, such an exam is nothing at all.

Xu Xingguo hesitated for a moment, thinking of the level that Pang Xuelin had shown in designing the high-purity carbon nanotube preparation and characterization experiment, and he said: "Okay, Professor Pang, we have prepared a total of 22 different professional course papers, and I originally planned to let you choose 16 of them and take two days to complete the exam, so two days may not be enough." ”

Pang Xuelin said: "Let me try it first, maybe if it's fast, it can be done in one day." ”

Xu Xingguo and the others smiled, undeniable, they thought Pang Xuelin was joking.

After all, no matter how fast a roll is, if it is finished in half an hour, you have to do it for more than ten hours without eating or drinking.

Not to mention that during this period, you still need to keep thinking, ordinary people can't bear it at all, Pang Xuelin can do it in two days, which is considered fast.

"Okay, let's get started!"

Xu Xingguo and the others took Pang Xuelin to a small conference room and directly began to issue curls.

The first is the organic chemistry test.

Various valence bond theories, molecular orbital theories, resonance theories; Structural characteristics, conformation, and chemical properties of alkanes, alkenes, alkynes, aromatic hydrocarbons, and bridge rings; Spectroscopic analysis, infrared, ultraviolet, nuclear magnetic resonance, mass spectrometry; Various three-dimensional structures of organic molecules, enantiomers, chiral molecules, mirror images, optical rotation, enantiomers, epimers, racemates, chiral ......

The undergraduate exams are the most basic things, and Pang Xuelin has long been familiar with these contents, and he wrote directly as soon as he saw the topic, and it only took less than 20 minutes for him to complete the organic chemistry test paper.

Li Jianbin took the exam paper and swept it from top to bottom.

Xu Xingguo asked, "Lao Li, how did you answer?" ”

Li Jianbin said: "Basically, there is no problem, even if it is strict, there are more than 90 points after deducting some mistakes and missing answer steps." ”

Xu Xingguo and the others were dumbfounded.

Then, Pang Xuelin began to do the inorganic chemistry exam paper, this time it was faster, and it was done in fifteen minutes!

Then, analytical chemistry, physical chemistry......

It only took one hour and ten minutes to complete all the four basic chemistry questions, and none of them scored less than 90 points, and the physical chemistry that was biased towards theoretical calculations got a full score.

"No wonder they all say that Professor Pang is a genius? I thought he was just extremely talented in mathematics, but I didn't expect him to be so good at learning in other fields. ”

Chu Shilin on the side said with emotion.

Li Jianbin said: "It's true, even if I am asked to answer these papers by myself, I may not be able to get such a high score, let alone answer them in more than an hour." ”

Although Li Jianbin has finished the exam papers, Li Jianbin has no intention of leaving.

He wants to see if Pang Xuelin can create a miracle today.

Next, Pang Xuelin began to solve the questions of polymer chemistry, materials chemistry and solid chemistry by Professor Tao Hong.

Pang Xuelin also completed all of these three exam papers in only one hour, and none of them were below 90 points.

The chemistry questions were almost done, and soon it was the turn of physics.

University Physics, Materials Physics, Mechanics of Materials, Structural Mechanics.

Compared with those chemistry problems that need to be memorized and elaborated more, physics problems that focus on calculation are simpler for Pang Xuelin.

Four exam papers, also completed within one hour, three of them were full marks, and one was a little bit of a mistake and was deducted two points.

At this moment, everyone was convinced.

The outside world calls Pang Xuelin the god of learning, Xu Xingguo and they originally thought it was a bit exaggerated, but now it seems that this title is really well deserved.

Seeing that Pang Xuelin was a little unsatisfied, Xu Xingguo smiled and said, "Professor Pang, it's already past twelve o'clock at noon, why don't we continue after eating." ”

Pang Xuelin nodded and said, "Okay, then let's eat first." ”

After half an hour of eating, Pang Xuelin began to answer the test questions at the graduate level.

Structure and Properties of Materials, Thermodynamics and Dynamics of Materials, Field Theory and Tensors in Materials Science......

Most of these papers are mainly based on solving questions, and when Pang Xuelin did it, it was a little slower than in the morning.

For example, in the question of thermodynamics and kinetics of materials, one of the questions is to ask Pang Xuelin to describe the advantages and disadvantages of the DSC curve and the DTA curve and how to determine the enthalpy.

Pang Xuelin spent nearly ten minutes writing a large paragraph on this question.

[The main difference between DTA and DSC is that DTA measures the temperature difference △T between the specimen and the reference substance, while DSC measures the heat flux rate (power difference) dH/dt when the temperature difference between the specimen and the reference material is kept at zero.] Although the shape of the curve and the quantitative correction method are very similar, the principle and the curve equation are different......]

……

[With an oxygen bomb calorimeter, the dorsal material burns at a constant volume, so Qv, i.e., ΔcUm, is measured.] According to ΔcHm(B,T)=ΔcUm(B,T)+ΔpV, if regarded as an ideal gas ΔpV=∑BνBRT, ignoring the effect of pressure on ΔcHm(B,T), it is obtained

ΔcHm(B，T)=ΔcUm(B，T)+∑BνBRT

The enthalpy value can be derived by calculation. 】

……

But even so, these three volumes only took Pang Xuelin an hour and a half.

In particular, tensor and field theory in materials science involves a large number of differential equations and partial differential equations, which require a high mathematical foundation, but for Pang Xuelin, this volume is the simplest.

In the end, Tensor and Field Theory Pang Xuelin directly scored full marks, and the other two papers were all above 90 points.

In the end, there are eight courses left, which are the various knowledge points that need to be learned at the doctoral level.

Computational Materials, Crystal Growth, Solid State Phase Transitions and Performance Effects, Dislocation Theory and Materials Strengthening, Photonic Materials, Energy Materials, Semiconductor Physics, Electron Microscopy in Materials Science......

Fortunately, the number of questions in these papers is not large, and each paper takes an average of 20 minutes.

At half past five in the afternoon, Pang Xuelin completed the answering of all subjects.

Xu Xingguo finished reading the answer to the last volume, and said to Li Jianbin and others: "What do you think?" ”

Li Jianbin smiled bitterly: "Except for saying a word of God, I can't use other words to describe it." ”

Tao Hong nodded and said: "I have seen it today, someone asked me who I am and how talented I am, I still can't believe it, Professor Pang has made such great achievements in mathematics at the same time, he can also take care of the study of other majors, I can only convince it!" Unfortunately, Professor Pang's main major is mathematics, and if his main major is materials science, his achievements in the direction of materials may not be much worse than mathematics. ”