At six o'clock in the morning on the second day of the Lunar New Year, Zhenhua High School rarely lost its previous popularity.

At this time, most students have not yet escaped from the atmosphere of the holiday, after all, they have worked hard all year long, and even the top students need to rest.

However, peace of mind is not among them, and since the first day of school, she has always maintained the habit of coming to school for self-study in the morning of the second day of junior high school.

Even the whole school was one of the first to come.

Anxin knows her strengths and weaknesses, she may be a good student in Zhenhua High School, but in the entire Hangzhou City and the whole country, her level is far worse than that of a real genius.

If you don't have talent, you need time to catch up, and she has always maintained a clear understanding of this.

The winter sun rises very late, and the entire school building is pitch black, except for the classroom on the right on the third floor.

Isn't this my own class, the sense of responsibility of the squad leader is instantly bursting, which fool does not know to turn off the lights before the holiday, and comes back to punish him for wiping the blackboard for a week.

When I walked to the door of the classroom, I heard the sound of paper flipping in the room before I could enter the door.

An An frowned slightly, could it be a thief?

The tables, chairs and benches in the classroom are not valuable, but the aura array on the ground is a good thing, and it is not unheard of before when the materials of the aura array were stolen.

Anxin took out a small metal finger guard from his schoolbag, and Anxin, who had ranked first in his class in all previous military trainings, was not easy to mess with.

She quietly opened the back door without making a sound, but was stunned when she saw the figure inside.

How is he!

The other party sat at the front of the classroom and worked hard to write, surrounded by a pile of test papers.

What kind of demon is Liu Fei doing?

It was Liu Fei who was in the classroom, and after a storm in the Quannong Poetry Club, Liu Fei had an unprecedented sense of crisis.

The urban defense circle is not a shelter of absolute security.

If it weren't for the fact that he happened to get a real fragment, the ghost knows if Liu Fei would have been able to walk out of the Agricultural Division yesterday.

He tossed and turned and couldn't sleep, so he came to school before 4 a.m.

The math upgrade exam is a hurdle, and if you fail, it means that this year's efforts are completely in vain, which Liu Fei cannot accept.

His requirements for this exam are simple, he must get a perfect score in mathematics to ensure that he can at least tie for first place in the whole school.

Liu Fei doesn't know how high a top student like Anxin has mastered mathematics, at least he thinks that 90% mastery of mathematics does not mean that he will not be able to get a full score, after all, the exam sometimes has a lot of luck, if you happen to encounter the right question...... Wouldn't it be nice to get a perfect score?

However, it is all based on sufficient knowledge and a lot of basic exercises.

Therefore, Liu Fei turned on the furious brushing mode, and he planned to use the shortest time to do all the practice questions sent by the school last semester, and cultivate the sense of doing questions as soon as possible.

was indulging in the sea of questions, and the sound of the door opening came from the back door, Liu Fei saw that it was the squad leader and immediately greeted him with a smile: "Happy New Year, class leader." ”

An An nodded politely: "Happy New Year." ”

Seeing that Liu Fei was sitting in front of him, he was not interested at all, and there was a chance that he was playing with a strange style of painting.

In order not to be bad, she felt that it was better to talk less, do a good job, and study well.

Seeing that Anxin opened his study notes and didn't mean to say much, Liu Fei also smiled and turned around to redevote himself to studying.

The classroom fell silent again, save for the sound of paper turning and pen nibs rubbing.

Mathematics was almost instinctive for Anxin, and she felt that she had reached a bottleneck, and if she couldn't break through, she might not improve much until she became a transcendent scholar.

For example, the question at hand: "Suppose that the battlefield is against the enemy using the school of mathematics to attack in a random process." Assuming that the mean of your attack is a normal distribution process t, is the time s of each of the three groups of outer space attacked also normally distributed?"

This is a classic inspection paradox problem, intuitively assuming that the average time interval between each demon in the battlefield to receive a process strike is 5 seconds, but when it comes to individuals, there will be a lot of fluctuations in this time, if the time from the next process strike is T, then E(T)>5s must be satisfied.

This problem not only involves a lot of knowledge of probability theory, but also examines the battlefield adaptability of scholars to a certain extent, and the variables formed by the reaction of the three groups in outer space are another complex problem.

Anxin remembers that this question appeared in a mock exam, but for a while I can't remember the specific year.

The roll was borrowed by Liu Fei, and this guy hasn't returned it to himself until now, Anxin couldn't help but pout, what about the special study skills that he said?

I haven't memorized all the volumes for three years after reading them, and this guy actually claims to have done it in one day, I really don't know where he got the courage.

"Liu Fei?"

"What's wrong squad leader?" Liu Fei turned his head and brushed the question so that his eyes turned in circles.

Anxin pursed his lips: "When will the roll be returned to me?"

"What rolls?" said Fei Ge, who had a lot of chances, and when he finished studying, he piled up the papers in the library, and he forgot about them.

Anxin was angry, this thing was really making fun of her! Those papers were finally sorted out with great difficulty, and she slapped the table: "Papers! Papers!

"Huh?" Liu Fei was detached from the dizziness of fighting with the test questions, and he suddenly remembered that he had borrowed the peace of mind paper a few years ago, and then became obsessed with studying......

In short, it seemed that he was wrong about this matter, Liu Fei quickly apologized, saying that he would definitely send it back tomorrow.

Teacher He Ling and Luo Yin went to the outer defense circle for a trip, so the volume could not be taken out in the library.

Anxin is a hundred distrusts of Da Fei: "You shouldn't sell my rolls, right?"

"How is this possible, tomorrow I will send it back. Liu Fei swore an oath.

Anxin was depressed and lying on the table, so what should I do today?

With obsessive-compulsive disorder, this is what she is most afraid of appearing, and if she finds the answer, she will be in a bad mood for a day.

Liu Fei came over embarrassedly, this matter was indeed unkind to himself: "What year's question? I'll tell you first." ”

Anxin lay on the table and didn't want to deal with this bad scum: "Go to the side, how can you tell me if there is no paper." ”

Liu Fei smiled: "I remember everything." ”

Anxin sighed, took out the history textbook from her bag, and decided to go out for a walk: "You can play by yourself, I will memorize history to change my mood." ”

Seeing that Anxin didn't care about herself, Liu Fei simply took her notebook.

"Die Liu Fei, you give it to me!" An Xin was afraid that Liu Fei would misfortune his things again, so he hurriedly snatched them back.

Liu Fei rolled his eyes, looking at the stinginess, he continued, "Isn't this the penultimate question in the three mock exams five years ago?" Check the paradox, right? I just brushed up on a similar question. ”

"En?" An Xin looked at Liu Fei with suspicion, this scumbag also knows such a strange term as the inspection paradox? Could it be a new routine?

Liu Fei didn't believe it when he saw Anxin, so he simply took the pen and paper. "In the process of solving this problem, I also saw that you wrote a long paragraph, you look at the ......"