For the new generation born after the seventies and eighties, in addition to life and death, choosing the most important node in life, many people may choose the summer of their college entrance examination.

The college entrance examination is not the only way to change one's destiny and improve one's class, but it is the fairest and most likely way at this stage.

Nine years of compulsory education, three years of high school education, and 12 years of hard study are just to meet this fateful exam.

For the students of Chonghua No. 1 Middle School and the new high school, it is no exception.

After the end of the last final exam of the second year of high school, they only had a week's vacation, and they officially entered the sprint stage of the third year of high school.

After entering the third year of high school, in addition to the arts and sciences have already been divided into classes, Chonghua No. 1 Middle School will also make up fast and slow classes according to the merits of students' grades, the fast classes are the top students in each class, and the slow classes are all students with poor academic performance in each class.

Zheng Kai's grades have always been very good, in the first and second years of high school, he can maintain the top three in the class and the top ten in the school, after entering the second half of the second semester of high school, his academic performance has improved by leaps and bounds, and he has been admitted to the top five in the school in several exams, and the most recent one has gone straight to the top three, so that Wang Ran, who has snatched back the first place in the school, can't help but pay more attention to him.

After the last class in the afternoon, there will be a half-hour break, leaving the students to eat and let off, and for students like Wang Ran and Zheng Kai, racing against time has become an instinct.

"No, my thinking is a little different from yours, this question needs to analyze what the initial velocity is, which is obviously a routine problem. However, this problem has one more pitfall than the traditional point award, that is, the position of the particle flying out is not obviously determined, so there should be a range of initial velocity of the final flight out of the magnetic field boundary. Wang Ran poked the reference book in front of him with a ballpoint pen, and said calmly.

Zheng Kai frowned slightly: "I don't agree with you, according to your solution, you can only get the result of the first question, and the second question will not work, and you can't get the result of V0=100m/s at all."

Wang Ran smiled: "It's very simple, the Lorentz force provides the radius expression of the centripetal force, and then substitutes two different radii into it, and it can be solved." ”

Zheng Kai slapped his head, yes! Why didn't he think it was so simple?

"Awesome, how did you come up with that?" Zheng Kai stretched out a thumbs up and praised him sincerely.

Wang Ran smiled and said, "If you had drawn the sketch more neatly and beautifully, you would have found it a long time ago." Look at the picture I made. With that, Wang Ran handed the test book of his own calculation to Zheng Kai. Zheng Kai took a look, and sure enough, the sketch was neat and neat, and it was much more accurate than the schematic diagram drawn by himself with a few simple strokes.

From Wang Ran's diagram, it is easy to think of using the Lorentz force to provide the centripetal force radius expression to solve this problem.

"Actually, I used to draw like you. Wang Ran said casually, "Later, I realized this problem, and I gradually changed it." ”

Zheng Kai was surprised: "Oh, how did you realize it?"

Wang Ran smiled: "Speaking of which, it has something to do with Zhang Chen before your class." ”

Zheng Kai was even more surprised, he hadn't heard that Zhang Chen and Wang Ran had anything to do with each other.

Wang Ran didn't sell it, and continued: "Didn't he surpass me in two exams in his freshman year of high school and become the first in the whole school? Later, I found out that he may not be better than me in terms of specific problem-solving ideas. But because he draws more carefully in his drawings, his considerations will be more targeted. That's why I realized the problem. ”

Wang Ran tilted his head, "I was quite unconvinced when he took the first grade, and I went home and worked hard, just to see who could do better in the college entrance examination, but I didn't expect it... Wang Ran pursed his lips and said with some dissatisfaction.

Zheng Kai smiled heartily: "I see, I don't know what's going on with this kid, he suddenly seems to have opened his mind when he goes to high school, and he wasn't so powerful in junior high school." ”

Wang Ran flickered his eyes twice, and suddenly asked, "You and Zhang Chen seem to have a good relationship, and he has really become a billionaire in the United States by inventing computers?"

Inventing the computer... Von Neumann's coffin board was about to be overwhelmed...

But this is the case in this era, those who have no contact with computers are not even clear about the difference between learning machines and computers. The media reports are also confused, and the fake news made up by the brain is flying all over the sky, and there are more than that.

Zheng Kai was stunned for a moment, "We used to have a good relationship, but we haven't been in touch for a long time." I also listened to the news that my classmates were looking for after the legend. He seems to have been exposed to computers and the like before, so I don't know if he really made so much money. ”

Wang Ran showed a playful smile: "You used to have a good relationship, it seems that your relationship is not good now?"

Zheng Kai frowned: "You can't say that, everyone has their own experiences, he is no longer in Chongyi school, there will inevitably be a new circle of contact, just like you and your elementary school classmates can't contact every day, right?

Wang Ran's eyes rolled: "But we at least have to meet and gather every holiday, and we usually correspond, if we still have a good relationship, we won't even have a letter, right?"

Zheng Kai just wanted to say something, when he heard a faint voice behind him: "This classmate, you seem to have some bad intentions to provoke the brotherhood between us like this, right?"

Zheng Kai turned around, Zhang Chen!

"What's the matter? Isn't it that I've become a lot more handsome lately, and I don't know each other anymore?" Zhang Chen touched his cheek and said narcissistically.

"Damn!" Zheng Kai spit out a dirty word, and it was a punch in Zhang Chen's chest.

Zhang Chen didn't dodge or dodge, Zheng Kai's punch was quite powerful, Zhang Chen rubbed his chest, "Day, are you really fighting?"

Zheng Kai snorted: "If you kid doesn't say a word, he won't come, and he won't be able to find you, this punch is light." ”

Zhang Chen stared at Zheng Kai fiercely, Zheng Kai didn't give an inch, Wang Ran looked a little weak-hearted, for fear that the two would really fight, just wanted to persuade him, but saw the two suddenly look at each other and smile, and sat on the desk next to him with their shoulders hooked.

"Is this your girlfriend?" Zhang Chen said to Zheng Kai with a pouting at Wang Ran.

Zheng Kai was slightly embarrassed, "Don't talk nonsense, this is Wang Ran from the second class before, have you forgotten?"

Zhang Chen patted his head, by the way, when he was an outstanding student cadre, it seems that Chen Huisheng also asked Wang Ran to give up the position of student union chairman to himself, this is the Wang Ran who often wore thick glass glasses before?

Zhang Chen said narrowly, "It turned out to be Secretary Wang, I'm sorry, I'm sorry, I didn't recognize it for a while." However, my brother is very good, do you want to think about it?"

Zhang Chen was wearing a black tight half-sleeved T-shirt and a pair of washed jeans, with his hands in his pockets, looking at Wang Ran and Zheng Kai with a smile.

Zheng Kai's face was flushed, "Don't talk nonsense!"

Wang Ran was very generous, and sneered: "If you call me Secretary Wang, what shall I call you?

Zhang Chen waved his hand: "You can call it anything, whatever you want, Zheng Kai is two months older than me, no matter what you call me, if you two become it, I will also call you sister-in-law." ”

Zheng Kai said angrily: "Okay!

Zhang Chen rolled his eyes, "Didn't you think it was funny when you made fun of me and Lin Xiaoxia?"

Zheng Kai was speechless for a while, and then said to Wang Ran with a little embarrassment: "I'm sorry, we're used to teasing each other like this." ”

Wang Ran looked at the two of them and was about to say something, but saw a subtle burst in from outside the classroom.

"Big news! big news!" Han Xu, who was barely assigned to the fast class, ran to Zheng Kai's side with an excited face, "I just heard the news, the school has a computer classroom, which is on the first floor of the three teachings. Huh, why didn't you react?"

Han Xu raised his head, "Old Bai!, why are you here?"

Zheng Kai burst out laughing, this nickname was given to Zhang Chen when he was in junior high school, after entering high school, no one had called Zhang Chen the nickname for a long time, and only himself and Han Xu, who had been in the same school or even a class with Zhang Chen from elementary school to high school, knew it.

Zhang Chen raised his hand and gave Han Xu a look at the back of his head, "You are only white!

The fast class of the new group is a combination of top students from eight classes, Zhang Chen doesn't know much, but it is obvious that almost everyone knows him, and those who don't know him are quietly introduced, and they also show excitement, their eyes glance over from time to time, and there are bursts of whispering from time to time.

Zhang Chen doesn't care too much, he has now gradually adapted to being the focus of attention, and has the consciousness of some public figures

Han Xu looked around, hehe smirked twice, "Lao Bai, do you know? Now that you are famous, during the summer vacation, my cousin was asking me if I was classmates with you." I thought you forgot about us all when you became famous. I'll go, why are you so strong now? You're still getting taller?"

After more than a year of continuous exercise and a reasonable diet, Zhang Chen's physical condition has been greatly improved and improved, even his height is three centimeters taller than in his previous life, and he officially entered the one-meter-eight club two months ago, which can be regarded as making up for Zhang Chen's regret that the difference in his previous life was less than two centimeters and less than one meter-eight.

But it is estimated that this is the case, since the height reached 1.81 meters, there has been no movement for more than two months, indicating that Zhang Chen's height development period has officially ended.

Now the people who can talk to Zhang Chen like this, in addition to their immediate family members, may be these classmates who have not yet entered the society and have been polluted.

Zhang Chen really felt something in his heart, maybe there is no pure feeling in the real sense in this world, but the relationship between classmates when he was young is one of the closest to pure feelings.

At least for now, there are not too many other elements in this relationship.

Wang Ran was much more astute than everyone else, and changed the topic: "Han Xu, what did you just say?

Han Xu nodded and said: "Just now Cao Guang and I went out to buy a boxed lunch, and I happened to see two big cars unloading at the gate of Sanjiao, so I casually asked what people were unloading, and the unloading said that it was a computer, and we set up a computer classroom." Han Xu said a little excited, "We are quite lucky, we can still catch up with the computer class in the last year of school, I asked my parents to buy me a computer, they don't buy it because it is too expensive, and I can use the school computer to practice." ”

Wang Ran blinked: "Maybe you are going to be disappointed, it is precisely because we are now in the third year of high school that it is impossible to hold any computer classes." Now that the class time of physical education class has been reduced, and all the goals are to sprint for the college entrance examination, how can it be possible to open a sub-subject?"

Han Xu suddenly felt a little frustrated, he had only come into contact with computers a few times in the past year, and he was very interested, and he was really excited to hear that the school had built a computer room and was going to hold a computer class.

Wang Ran saw Han Xu's appearance and sneered: "There is no need for this, Guanghua and Binzhong did have a microcomputer class, but each of them only had ten minutes on the computer in each class, and the rest of the time was used to send papers for exams, test the history of computers, binary principles or something, which was very boring." There are only ten computers in the computer room, and they can only take turns to get on the computers. ”

Han Xu's eyes widened: "There are only ten, won't it?"

Wang Ran's wife is a university professor and has been well-informed since she was a child, so she said as a matter of course: "Yes, computers are so expensive, even Guanghua and Binzhong can't buy too much." The computer center built by Binda last year only has more than 50 computers. ”

Han Xu scratched his head: "No, Cao Guang and I just saw that the truck was being unloaded, two big trucks, unloading a lot of cardboard boxes, there must be more than fifty units." ”

Wang Ran sneered: "Either you are wrong, or there are other things in the box." ”

Han Xu hurriedly said: "I must be right, the cardboard box is printed on it." ”

Wang Ran smiled and didn't speak, she was born in an education family, and she knew very well that the school had to have a budget for everything, although Chonghua No. 1 Middle School was not poor, but she still didn't believe it if she let No. 1 Middle School come up with such a large sum of money.

Seeing that Wang Ran didn't believe it, Han Xu hurriedly said: "Really, I don't lie to you, I don't believe you can go and see it yourself." When Han Xu saw Zhang Chen, his eyes couldn't help but light up, "You ask Zhang Chen, he just came, he should have seen it too." ”

After that, Han Xu asked, "Lao Bai, have you seen it?"

Zhang Chen nodded with a smile, and Han Xu jumped three feet, "Look, I'm right, right? Look at the boxes piled up at the door of the Three Sects, there are at least fifty or sixty units. ”

At this moment, Huang Zhifei stood outside the classroom and knocked on the door, Zhang Chen saw this, raised his hand and looked at his watch, and said to Zheng Kai and Han Xu: "I'll go do something first, I'll come back in a while, and I'll invite you to dinner in the evening." ”

After that, Zhang Chen followed Huang Zhifei out of the classroom.

When Han Xu saw Huang Zhifei, he was a little surprised, and he didn't speak for a long time.

"What's the matter? The bell will ring immediately for the evening self-study, why don't you go back quickly? Do you want to be scolded by Lao Lu again?" Zheng Kai reminded Han Xu that Han Xu was the worst student in the class, and he was the focus of the head teacher Lu Xiuling.

Lu Xiuling pays attention to Han Xu, in addition to his poor grades, the main reason is because she is Han Xu's second aunt...

"The person who just went out with Zhang Chen was the one who commanded the workers to unload the goods。。。。。 Han Xu muttered to himself.

Day by day, I actually made 4,000 words!!!!!! I came back from work at 11 o'clock in the evening, and I really coded it!!!!

(End of chapter)