This kind of small paper is of little significance except for pretending to be a pussy among classmates. Li Xuan has no proud expression. His current situation is more than No. 2 Middle School.

Ten days of training with the top students in the country, the lecturer's class speed is comparable to the speaking speed of the host Hua Shao. The content in ten days is worth more than the amount of knowledge that many students consume in one semester. It really broadened their horizons. When they returned to the small fish pond of No. 2 Middle School, their mentality became more peaceful.

Li Xuan’s current mathematics is at the top level in the country’s high school students. He made up his mind to practice more, read more books to expand his horizons, ensure that the CMO gold medals and enter Tsinghua and Peking University steadily.

In addition, he also wants to join the national team.

CMO, also known as the national competition, can stand out in this kind of difficult math competition. Even if it has luck, the math level of high school students in the country must be at least top 200. Without this strength, you can't join the training team. So Li Xuan thought that he would better have the strength of Master Wei's sweep training team that year to ensure that there is no mistake.

Because the difficulty of the CMO test questions in the national competition is higher than that in the international competition, Master Wei swept the CMO national competition and went to the IMO international competition, and still swept all the way and won the gold medal with full marks.

And Li Xuan can do it with his efforts to reach the level of Master Wei.

...

...

Today, Li Xuan came to school and of course he still taught as usual.

In addition to mathematics classes, the competition class also has other subjects, and the teacher will assign much less homework.

Today, in biology class, the biology teacher is quickly explaining the knowledge in the textbook.

This biology teacher is named Guo Jie. He is not teaching Class 12, but a key class. He is very dissatisfied with the students in the competition class blindly coming to participate in the competition. In his opinion, competition delays students' college entrance examinations, at least for most competition students. After all, competitions pay too much attention to talent.

Li Xuan was writing quickly, thinking about a number thesis when he suddenly heard the biology teacher say on the podium:

"Li Xuan is the best person in this class to math, physics and chemistry? Then please ask Li Xuan to answer this question."

Li Xuan was stunned for a moment and stood up helplessly.

Teacher Guo Jie saw that Li Xuan had been away for a long time and sighed softly. Li Xuan took the lead in reading extracurricular books. He had no idea. Li Xuan had a good academic performance and was normal to have privileges. However, Li Xuan had not even written biological homework recently, so he had a lot of opinions.

Li Xuan stood up and couldn't figure out the situation, because the teacher had rarely asked him questions in class, and he agreed to his own behavior of reading extracurricular books.

And now, Li Xuan’s goal is to enter the national team and go directly to Tsinghua University without exams. Recently, the focus is no longer on high school knowledge, and he has almost abandoned high school biology. After all, other high school subjects are meaningless to him, and many teachers also know it, so he has not made things difficult for him because he does not do homework.

He focused on learning more profound math knowledge, occasionally reading extracurricular extended reading materials for other subjects to increase his knowledge and relax. After participating in the Chaoyang Cup, he completely threw away high school biology, and he didn't remember how long he hadn't done high school biology questions.

At this moment, the whole class was staring at Li Xuan. Qiao Siling was also looking at Li Xuan, not worried about Li Xuan, because Li Xuan's answer was often the standard answer.

Guo Jie looked at Li Xuan: "Tell me about the three causes of cancer."

Li Xuan was stunned for a while and stammered for a long time, but could not tell which of the three reasons were.

X-ray?

Alkyrgent?

Particle radiation?

DNA tumor virus?

ebv virus?

Hepatitis B virus?

In addition, it seems that family medical history will leave a risk of cancer, and the more you think about it, the more complicated it becomes.

Li Xuan was a little surprised and raised his hand to surrender: "Teacher, I don't know."

The whole class heard laughter.

Guo Jie sighed: "You are good at math, don't let go of other subjects. Now the provincial first prize cannot be recommended. Only those who can directly be admitted to the national training team are the strongest 60 people in the country. So, Li Xuan, can you guarantee that you will definitely enter the national training team? You must know that the gold medalists in the national competition also have precedents of missing in the provincial league. Our No. 2 Middle School does not have a place to directly enter the national competition like Hualien High School. If you don't enter the national competition, or fail the national competition and don't go to the training team, you may have to participate in the independent enrollment examination of Tsinghua and Peking University, and other subjects should also be paid a little attention."

Li Xuan was speechless.

Guo Jie said with some seriousness: "It's okay to leave a way out for yourself. Don't put the eggs on the same basket, and throw them into the training team. If you don't enter, wouldn't you collapse? So, you should also pay attention to other subjects. Such a simple question must be clear!"

Li Xuan couldn't help but accept it humbly. He found that his biological knowledge was indeed a bit weak, and asked curiously: "Teacher, what are the three reasons?"

Teacher Guo Jie: "Remember! There are three causes of cancer, physical causes, chemical causes, and biological causes!"

Li Xuan was stunned, Meow, is that so simple, is it like this?

Li Xuan couldn't explain it, so he sat down helplessly. The first time he found out that it was harmful to know too much and he thought too much about it.

Forget it, except for extracurricular books on mathematics and physics, he can read them, and not read extracurricular books on chemistry and biology for the first time. He is just curious and often read too many extracurricular books. In the end, he doesn’t know how to do simple questions in the college entrance examination.

That is to say, whether high school biology and chemistry can not be so fake, is it okay to be linked to the frontier of the subject? Many knowledge and many university textbooks are inconsistent.

Other students were also surprised that Li Xuan would be wrong with such a simple question.

Li Xuan shook his head gently. His goal was very firm, and he was still the national training team and was sent away directly. With his current strength, it was actually enough. Even if he made a mistake once, he still had a chance in the second and third year of high school, so there was no need to worry too much.

...

...

After class, Li Xuan went to the office of the mathematics teaching and research group, found Lin Xuerui, and returned the "Harbin Algebra Theory".

Lin Xuerui asked Li Xuan about his progress and was shocked by Li Xuan: "The collection of questions about elementary number theory in mathematics Olympics in various countries" and "1,001 questions in classic number theory"... Have you finished reading all these?"

Li Xuan nodded, "I've finished reading."

Apart from his usual surprise, Lin Xuerui couldn't feel anything else and asked: "Have you noticed any problems?"

Li Xuan nodded. He found that the coach's brain circuit is different from that of ordinary teachers. Normal teachers will ask what you have learned after reading the books. She will only ask what problems did you find after reading these books?

Perhaps in her mathematical concept, discovering problems is more important than solving problems. In fact, the same is true in scientific research. Problems can always be solved. Whether problems can be discovered depends on talent and care.

Li Xuan recalled, "Coach, I really found a few problems. I don't understand them very much, it's like this..."

Li Xuan picked up the book and began to say something he didn't understand, or something he felt was wrong in the book.

Lin Xuerui started to think while listening.

In some places, Li Xuan lacks knowledge, so she can point out mistakes directly, but there are also places where she purely tests skills, so she also needs to take some time to think about it.

Li Xuan has a strong thinking ability and can grasp key points that ordinary students cannot grasp. The contents in these books have been identified by Li Xuan for several imprudent problems.

Lin Xuerui was a little surprised. She didn't find any errors in the book before reading the book. After answering Li Xuan's few questions, she shook her head: "I can't answer your last question to you, I want to think about it..."

After saying that, she picked up the pen and silently calculated on the paper.

Li Xuan looked at her calculation silently, very happy and gained a lot of new knowledge.

When asking questions, students can gain knowledge from teachers, and teachers can also gain inspiration from students. This kind of benign interaction, in and out, can both feel very comfortable with each other.
Chapter completed!