When the first rays of sunlight shine on the soil of the school, the soft music also begins to echo in the campus, is a cheerful, full of vitality waltz - "Blue Danube", this classic song that has been passed down for more than two centuries, in the morning light to wake up the sleeping students, students in the cheerful music to wash, clean up, a good day always starts with a pleasant morning.

Zhang Chengyuan had a lot of dreams last night, sweet dreams. He happily went to breakfast and class with his roommates, as if he had never been so happy.

At 7:40, the class bell rang, and the head teacher, Mr. Li, walked into the classroom on time and came to the podium. The students also very disciplined and quickly went back to their seats, sat down, and silenced.

"Okay, students, let's start class. Let's talk about today's schedule first, classes during the day and rest at night. The first two sections are the foundation of the project, and I will give it to you. Introduce the assessment system of the Sailing School. There are six courses, and there are final exams in each semester, and the test scores are divided into four grades: 3, 2, 1, and 0, and 0 points indicate that you do not pass and drop out directly. A score of 1 means pass, 2 points indicate excellent, and 3 points indicate excellent grades. ”

"Teacher Li?" Instructor Lu suddenly appeared at the door of the second class classroom and motioned for Teacher Li to go out and speak.

Teacher Li nodded and walked straight out of the classroom.

The students are under a lot of pressure in their hearts, and they are all thinking about quantifying their grades.

Teacher Li returned to the podium, looked outside the classroom door, and then said to the students, "Well, there is a student who was unable to attend our entrance ceremony yesterday due to some accidents, and only came to our class today, everyone come to our class with applause and welcome!" ”

As soon as Mr. Li's words came out, Zhang Chengyuan turned his head violently, and Chen Jiatong also looked at Zhang Chengyuan with stunned eyes. Only the two of them in this room knew that Situ Shan was suffering from leukemia, and Wei Hengyi was also affected by this and gave up the Sailing School, but why did Wei Hengyi suddenly come here today?

But no matter what, Zhang Chengyuan and Chen Jiatong must be looking forward to his arrival, maybe Wei Hengyi was impulsive at the time, and later regretted it, so he returned to the Sailing School, and the school did not reject him.

In the applause of everyone, Zhang Chengyuan and Chen Jiatong's applause must be the most urgent and eagerly awaited, and they are looking forward to Wei Hengyi's figure entering the classroom.

Amid the applause of her classmates, a girl walked up to the podium.

No one was more surprised than Zhang Chengyuan and Chen Jiatong.

No.

To be precise, no one's eyes should be more surprised than Zhang Chengyuan.

Chen Jiatong was surprised because the person who came in was not Wei Hengyi, and she didn't know this person.

Zhang Chengyuan was even more surprised than Chen Jiatong because he knew this girl.

That girl, he knows 100% of it. She is the only girl among the children of the Excellence Alliance who studied in the Enlightenment School who was not admitted to the Sailing School, the undercover agent of Ruan Xiyue's father who forced Ruan Xiyue to hide his feelings for three years in junior high school, and Zhang Luoqi, who couldn't run a 4,000-meter run and didn't have good grades!

Zhang Chengyuan is very entangled in his heart, on the one hand, Zhang Luoqi is also his friend, in such a strange environment, it is undoubtedly a good thing to have one more acquaintance; On the other hand, although Ruan Xiyue's father can't control her love now, but Zhang Luoqi is here, Ruan Xiyue's father is bound to know about this matter; And everyone here has been screened out through the hard work of many exams and cruel competition, so many outstanding children have not squeezed in their heads, why can she Zhang Luoqi come to the school?

Zhang Luoqi stood in front of the podium and accepted the applause of her classmates. She clasped her hands together, lowered her head slightly, muttered a few words as if to introduce herself, and hurried off the podium to the empty seat in the back row.

Zhang Chengyuan was still struggling with the question of why Zhang Luoqi would come to the school, and the teacher had already started class.

The first lesson in Fundamentals of Engineering is about the fundamentals of mechanics: force, acceleration, displacement, and the relationship between force and motion.

This knowledge is not a challenge for Zhang Chengyuan, not that he is not modest, but he has a very solid conceptual foundation of orthogonal decomposition, vector operation, and derivatives, so it is really effortless to understand.

Zhang Chengyuan looked around at his partners, and Sun Wanyang, who was sitting on his right, turned his pen and nodded in agreement; turned his head to look at Chen Jiatong who was doing it in the back, and he also looked like he was listening to the lecture carefully; Turning his head to look at Zhang Luoqi again, he was looking isolated from the world with his head down and flipping through the book.

"Zhang Chengyuan, Zhang Luoqi, the two of you come up and solve these two questions on the blackboard." Mr. Li apparently saw that the two of them did not make eye contact with him, so he called them up.

Zhang Chengyuan found that the teacher was a little ashamed to see that he was not focused on the class, but he had already understood the question when he got up and walked to the blackboard, and the moment he stepped onto the podium, he had the answer in his heart. A very pediatric problem, a small iron ball of known weight is hung on the ceiling of the truck with a rope, and the truck accelerates evenly to find the angle between the rope and the plumb line.

Zhang Chengyuan calculated the resultant force corresponding to the acceleration of the small iron ball, and then drew a triangle on the blackboard with vector addition, and then wrote the result with a stroke of the pen. When writing the results, Zhang Chengyuan used his afterglow to catch a glimpse of Zhang Luoqi standing on his right and facing her own question in a daze, so Zhang Chengyuan took a step back after writing the answer himself, still facing the blackboard, pretending to check, and quickly swept Zhang Luoqi's question with his afterglow, which was just a vector calculation problem that changed the soup without changing the medicine. Zhang Chengyuan threw down the chalk, walked down the podium from the side where Zhang Luoqi was standing, and when he passed by Zhang Luoqi's side, he casually whispered: "54." Then he returned to his seat.

Although Zhang Luoqi is introverted and doesn't like to talk, it's not that introverts are not smart. She used chalk to write very lightly on the blackboard as if she was calculating something, and then erased it with the board, filling in the final answer in the space of the question—(54). Then he threw down the chalk, still with his head down, and walked back to his seat.

Although this is a very basic question for high school mechanics, it is not easy for students to quickly and skillfully apply these concepts when they are just exposed to the concepts of force and acceleration and orthogonal decomposition of force, so although the two questions are not difficult in Zhang Chengyuan's opinion, they stumped most of the students in the classroom.

"In my class, you don't have to be restricted, you can stand up and ask at any time if you don't understand, and students who understand can not listen. Of course, if you don't want to listen, you can not listen, I don't want my classmates to think that my class sounds disgusting, and by the way, they think that I, the class teacher, are also disgusting. Teacher Li said humorously.

The classmates burst into laughter. Teacher Li took this opportunity to pat Zhang Chengyuan on the shoulder and said, "The solution is easy to calculate, and the hand sent is good to assist." ”

Zhang Chengyuan was ashamed, it seemed that his little trick did not escape the deep eyes of the head teacher.