After taking a shower and changing clothes, Xia Lu posted a circle of friends: "I won the first place in the school in the 50-meter freestyle, and I am quite happy." ”

Attached Ranking Table:

1. Xia Lu, 24.00 seconds;

2. Lin Yu, 24.25 seconds;

3. Zhu Peng, 24.50 seconds;

……

All kinds of likes and replies instantly filled Xia Lu's circle of friends.

Cui Minhong: "My son is strong!"

Xia Guohua: "Yes." ”

Xia Lu's aunt: "A nephew with all-round development of morality, intellect and body." ”

Xia Lu's cousin in the first year of junior high school: "My brother took me to the king." ”

Professor Yu Feng: "Hold your breath and win the championship all the way, Xia Lu is definitely a professional-level performance!"

Professor Cao Zhenggang: "I still have such athletes in Hongyi Academy?"

Zhang Kai: "Xia Luxiu!"

Du Shengyong: "Xia Lu Tianxiu! Hey, I ran 100 meters to run and was disqualified." ”

Qin Yibo: "Damn, it's a big loss, I didn't see anything, I saw Du Shengyong, the sand sculpture, rushing away." ”

Zhao Li'an: "Xia Lu still has something. ”

Ma Jielin: "The Faculty of Arts sent a congratulatory message. ”

Hao Tian: "A congratulatory message from a friendly school. ”

Tang Wan: "Are there really two hits?"

The mother-son relationship with Cui Minhong is valued at +188......

+128

+88

……

Anyone who knows Xia Lu and sees this update in the circle of friends, the emotional valuation between them and Xia Lu has been more or less improved.

After the race, Xia Lu received the first place certificate in the 50-meter freestyle and a shopping card worth 1,000 yuan.

The so-called layman looks at the lively insider, and the assistant coach of the school swimming team found Xia Lu for the first time.

The assistant's surname is Xiao, he is not very old, he is in his twenties and less than thirty years old, he asked Xia Lu: "How many years have you learned to swim?"

Xia Lu said: "I was introduced to swimming at the age of six, and I started to learn formal swimming style from the coach at the age of thirteen or fourteen. ”

"You swim to 24 seconds, which is the level of first-class athletes, and every year when we recruit students, there are very few first-class swimmers who enter our school, so every freshman first-class swimmer will attract our attention. But Xia Lu, we didn't know that you were such an excellent swimmer in your freshman class. Assistant Xiao was a little puzzled, a student of Xia Lu's swimming level should have been noticed by the swimming team a long time ago. If it weren't for today's game, Assistant Xiao really didn't know that there was such a person as Xia Lu.

Xia Lu: "It's not good, I'm just an ordinary student who loves swimming."

"Yo, you're quite modest. Assistant Xiao smiled, and then reminded: "Xia Lu, you should also understand, the way of swimming without ventilation throughout the whole process is really fierce, but doing this for a long time will hurt the body." Many professional players will take the whole breath-holding method to try to impact the championship in the finals of the Olympic Games and World Championships. Of course, this way of swimming in yours is very ornamental, anyway, I am a fan of you. ”

Xia Lu smiled: "It's okay, I'm used to holding my breath, but it's uncomfortable to breathe." ”

"Xia Lu is really an interesting and powerful person, are you interested in joining our swimming team?" Assistant Xiao sent out a sincere invitation.

Xia Lu asked: "After joining the school team, swimming is free, right?"

Assistant Xiao nodded and said, "That's absolutely free, not only free, but you can also get nutrition subsidies." If you get good results in competitions at or above the provincial level, it will be helpful for you to be the best in the evaluation. ”

Xia Lu: "Teacher Xiao, you also know that our Hongyi Academy has a lot of academic pressure, and I may not be able to go to the swimming team to train every day. ”

Assistant Xiao: "Understand, study is important, you can come to train if you want to, don't force it." ”

Xia Lu: "Okay, I'll join the swim team. ”

With that, Xia Lu joined the varsity swimming team and posted the news in his circle of friends.

The school-wide sports meeting ended successfully, and Xia Lu was the only champion of Hongyi School.

The students of Hongyi Academy often win championships in various fields, subject competitions, modeling competitions, debate competitions, singing and dancing, poetry and songs, and so on.

Many of the champions in these fields are at the national level, and even at the international level, every year.

However, in terms of sports, Hongyi Academy is relatively weak, not to mention the national champion, and even the whole school champion can only produce one in several years.

Every university has a certain number of special sports enrollments, and Jiangcheng University is no exception, but no sports special enrollments have ever entered Hongyi Academy.

Students with great cultural achievements and sports are really hard to find.

Hongyi School especially praised Xia Lu's excellent achievements in the school-wide sports meeting, and the picture of Xia Lu winning the championship appeared in the official account of Hongyi School, and many students and brothers and sisters of Hongyi School knew Xia Lu and liked and left a message in the official account.

Professor Yu Feng was completely a fan of Xia Lu, he watched Xia Lu's game on the spot, and Xia Lu really held his breath so hard that he flew up.

"Xia Lu, you have joined the school swimming team, right, okay, good, this specialty of yours is unique in Hongyi Academy, continue to maintain it, I am your die-hard swimming fan, when is the next game?"

"I don't know, wait for the notice. Professor Yu, I have already completed the two usual assignments you assigned, and you can give the axe to the axe. Xia Lu opened his laptop and pulled up the document.

Both Newton and Leibniz attached great importance to the self-consistency of the system, and Newton's confusion was God's intervention in the gravitational system, a problem that he could not confirm until his death, which he attributed to empiricism. Leibniz, on the other hand, adopted what was extreme at the time: predetermined harmony. ”

By the standards of the 21st century, Leibniz looked further, and some of his ideas had profound philosophical truths. He used a new mathematical expression to depict nonlinear motion and infinity. ”

"To take a simple example, if the direction derivative f'(x;s) = limf(x+τs)-f(x)/τ exists, then f is a ...... that is differentiable in direction"

Yu Feng reviewed the LaTeX document written by Xia Lu, initially with a quick glance, and finished reading it in less than a minute.

"Huh?" Yu Feng made a cup of tea, he tasted the tea slowly, and reviewed Xia Lu's homework again.

This time, Yu Feng slowed down a lot in the speed of the review operation.

"Isn't it badly written?" Xia Lu whispered, not daring to make a loud noise.

"This assignment was completed by Xia Lu alone?" Professor Yu asked, unable to tell whether he was happy or angry, whether he wanted to praise or criticize.

"I looked up some information and did it alone. Xia Lu said.

"Xia Lu, your understanding of mathematics is still in its infancy, but the direction is correct. Professor Yu commented, and he typed directly on Xia Lu's computer keyboard, revised some content, and marked some key points.