Great Country Academician

After returning the copyright authorization agreement, before leaving, Xu Chuan refreshed the status of the thesis on the computer.

It's a pity that nothing has changed, and there is no mysterious power that can help him jump in line. It seems that it was indeed a coincidence that he passed the preliminary examination the previous day.

After the national finals of Wujing, the students who participated in the competition returned to their normal lives.

The national competition is still early, at the beginning of March next year, the students selected for the national training team for the Olympic Physics Competition will go to Qinhuai to conduct training at the Middle School Affiliated to Sanjiang Normal University.

In this training camp, 50 students will compete for the five national team spots in two rounds of selection. As for the period before March, the students participating in the competition will temporarily return to high school life.

But this is for ordinary contestants. For Xu Chuan, after the physical competition exam, he will have to go to a distant place to participate in the national math competition in less than a month.

This year's winter camp was held in Bashu Middle School in Bashu, and nearly 400 students participated.

Xu Chuan didn't have much pressure on the national final of the math competition.

It has been more than three months since he was reborn. During this period of time, his studies have never stopped, and the high school knowledge buried in the huge memory in his mind has also been re-discovered by him.

"Brother Chuan, I heard that the spicy rabbit head in Bashu is delicious, should we try it?"

In the provincial team, the round-faced Lu Tianrui asked excitedly and expectantly.

"After the exam, go eat now, and you won't be afraid of diarrhea when you play tomorrow."

Xu Chuan smiled and said, even though he is a native of southern Hunan and can eat spicy food, he is not very suitable for the spicy food in Bashu.

"Besides, rabbits are so cute, why do you want to eat them?"

Suddenly, Xu Chuan suddenly remembered a famous saying he had heard in his previous life, and thought it fit the occasion, so he said it casually.

Immediately, all the students participating in the winter camp in the accompanying team were stunned, and there was silence.

What did they hear?

Is this still the Great God? Is it still the master who got almost full marks on CPHO and was snatched away by Mizuki and P Da?

Or is it that only by being cute can one become a great god?

Could it be that the distance between me and the great god is only one gap, will it be cute?

The winter camp for the national finals is the same as the previous golden autumn camp of P University, and the duration is seven days.

Registration on the first day, opening ceremony on the second day, exams on the third and fourth days, academic reports or visits on the fifth and sixth days, closing ceremony on the seventh day, announcement of test results and awards.

It may be that the people of Bashu are too enthusiastic, or it may be the first time that such an event as the CMO Number Competition is held. At the opening ceremony on the second day, Xu Chuan and his team experienced the massive delicacies of Bashu.

Bobo chicken, spicy rabbit head, skewers, bean curd, etc. These specialties and delicacies that should appear on the street all appear in the cafeteria of Bashu Middle School.

Xu Chuan even found a hot pot in a corner of the cafeteria, but he didn't dare to order it, because the red oil, green peppercorns, and red peppercorns floating on the hot pot made people feel that the chrysanthemum was tight at a glance.

It's not that he can't eat spicy food, but this kind of food with pepper and pepper is very irritating to the stomach, let's forget it.

Xu Chuan was worried that after eating hot pot tonight, he would be dehydrated tomorrow.

It is not unreasonable that the anorectal hospitals in Bashu are extremely well-developed all over the streets and alleys.

He even wondered if the cafeteria of Bashu Middle School wanted to eat other students' stomachs to improve the test scores of Bashu local students.

After all, this is a hot and spicy thing, and candidates in coastal cities may not be able to bear it.

The report and the opening ceremony passed quickly, and the finals officially began on the third day.

The difference from the Wujing Guojue is that the exam time for the Shujing Guojue is longer.

Each game of physical competition is three hours, while that of digital competition is four and a half hours.

Starts at nine o'clock in the morning and ends at half past noon.

During the four-and-a-half-hour exam, candidates are allowed to bring in some food that does not affect the order of the exam room, such as Snickers bars, biscuits, energy drinks and the like.

After all, the exam lasts for four and a half hours, during which it will consume a lot of brainpower, and you are not allowed to bring any food. You faint from hunger, and you have hypoglycemia, what should you do?

Of course, you can bring food, not everything can be brought.

In the early years, a student brought stinky tofu and durian candy into the examination room, and as a result, other candidates in the same examination room were stunned.

Therefore, the rules were changed later, allowing food to be brought, but the smell should not affect other candidates, and they will be checked before entering the test.

Xu Chuan didn't bring anything to eat, he only brought a bottle of drink.

After all, he wasn't going to stay for the full four and a half hours of exam time.

The data competition CMO is divided into two days, with three questions a day. The questions on the first day are easier than those on the second day.

Judging from the competition questions in previous years, sometimes there will be fill-in-the-blank questions in the first question.

But don't think that filling in the blanks is easy. Although he only needs one answer, the proof process is calculated by the examinee.

At 9:00 am, admission, inspection, and distribution of test papers.

After getting the test paper, Xu Chuan still checked the overall situation according to his own habits.

Three questions, no fill-in-the-blank questions, one geometry triangle to find common circles, one integer to find sets, and one function, all are proof questions.

Domestic CMOs have imitated the international IMO exam rules, and the difficulty of the questions is similar, but the test scores have tripled.

IMO is 7 points per question, and CMO is 21 points.

This makes it easier for the marking team to score and distinguish the candidates' grades.

Compared with the physical competition, the layout of the test paper of the mathematics competition is quite simple, and the scope of the questions is quite small.

Without those introductions and all kinds of introductions, it is straightforward to ask questions, which is simple and neat.

first question:

1. As shown in the figure, in the acute angle △ABC, AB\u003eAC, the angle bisector of ∠BAC intersects with side BC at point D, and points E and F are respectively on sides AB and AC, so that B, C, F, E are four points in a circle.

Proof: The necessary and sufficient condition E for the center of the circumscribed circle of △DEF to coincide with the center of the inscribed circle of △ABC is BE+CF=BC.

Triangular geometry proves the condition of the center of the circle. The figure is that a large triangle is equally divided by the median line, and there is a small triangle in the middle connecting the sideline of the large triangle.

In Xu Chuan's opinion, the difficulty of proving a congruent triangle is not very high. If he were to evaluate it, the difficulty is only two or three points harder than the final question of the college entrance examination.

The trouble is that it takes multiple auxiliary lines and a certain amount of imagination.

After thinking about it, Xu Chuan started to write. He first copied the triangular geometry on the manuscript paper, then marked an I point in the center of the two corners, and started to make auxiliary lines with the I point as the core.

EI, FI, BI, CI, KI, a total of five auxiliary dotted lines appear straight on the manuscript paper.

After the key auxiliary lines and dots are marked, the next step is to write out the proof process.

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