"When the parabolic vertex is at the origin, the focus is on the y-axis, and the distance from the previous point P(m,1) to the focal point is 5, then the parabolic equation is ......" Teacher Ding finished reading the question and glanced at the podium, "Shen Zilu, what to choose?" ”

Why is ...... called her?

Shen Zilu swore that if her science was as brilliant as liberal arts, she would walk sideways at school, but God has always slapped her face regardless of gender, and her science would be as bad as a broken tofu brain.

Standing up, "Pick ......" she glanced at Wen Tuoxi, who pointed at answer C with the tip of her pen.

"Pick C."

"Well," Mr. Ding nodded with satisfaction, "Let's talk about the next steps, why choose C?" ”

"Because ......," Shen Zilu blinked, "...... C pair. ”

Teacher Ding suddenly raised a low pressure around him, looked at Shen Zilu with sharp eyes, and the classmates also laughed, Wen Tuoxi, who was at the same table, couldn't help laughing, Guan Zhengxing was always expressionless, and the corners of his mouth were unconsciously pulled when he lowered his eyes.

"Don't laugh," Teacher Ding said with a serious face, "Let you not pay attention to the lecture in class, and listen standing up!" ”

Shen Zilu pursed her lower lip, becoming the only cub in the class standing to listen to the class, Teacher Ding's gaze swept behind Shen Zilu, "Guan Zhengxing, you say it." ”

There was a slight grinding sound between the table and the floor, followed by a slightly hoarse voice from behind.

"Because the apex of the parabola is at the origin, the focus is on the y-axis, and the point P(m,1) is on the parabola, so the opening of the parabola is upward, and the equation for the parabola can be x2=2py(p>0)......" Gentle with a humble gentleman's tone and frustration, unassuming, very steady, those symbols and numbers from his mouth, as if they had become different. Shen Zilu thought that if he was a math teacher, she would definitely be able to listen very seriously," ...... So the parabolic equation is x2=16y. ”

Teacher Ding asked, "Shen Zilu, do you remember?" ”

She nodded, "Got it." ”

"Copy this question five times after class."

Five times?

Shen Zilu's expression was wrinkled, but when she saw Teacher Ding staring at her with indignation, she had to say, "Got it." ”

After class, the other students went out, Shen Zilu was copying the questions sadly, when Guan Zhengxing passed by her desk, he glanced at it and found that she had copied the wrong steps, I wanted to ignore it, but the obsessive-compulsive disorder of mathematical rigor was committed, and she took two steps and went back.

"Wrong."

A voice came overhead, and he said, "Solve p=8." ”

"What I said, it seems that something is wrong," Shen Zilu's eyes lit up, "I didn't understand just now, can you tell me again?" ”

Guan Zhengxing said with an indifferent expression: "No." ”

"Why?"

"You're so stupid."

...... "You're too stupid?!"

It's the same as people saying you're too ugly, you're too short, you're too fat, it's heart-wrenching and realistic.

"Who do you say stupid?" Soldiers can be killed, but they can't be humiliated, and uncles can't bear it.

"You," Guan Zhengxing struck the man categorically, "and here you left a few words down," his slender and clean fingers pointed to the workbook, "according to the definition of parabola,...... I can't even understand it. ”

Shen Zilu bit her lip, "I just didn't understand this question, I understand everything else." Tilting his head, facing Shangguan Zhengxing's gaze, he turned his face away, "Do you understand what is about me." With that, the man walked straight out of the classroom.

...... "Hey, I'm going, why is it so annoying to talk to him!"

Sheng Hailuo came back from outside the classroom, "What's wrong with you?" Faced so red? ”

Shen Zilu lifted her cheeks in annoyance and corrected the wrong steps, "It's okay." ”

I can't tell her that I'm stupid and explosive.

……

After evening self-study, Shen Zilu and Sheng Hailuo separated at the school gate, and as soon as they stepped on the bicycle, they saw Guan Zhengxing stopped by two young people.

Broken!

The alley is called Xing'an Old Street, it is an old building during the Anti-Japanese War, in the first few years, it was rated as a municipal key cultural protection site, the shantytown has not moved here, it stretches long and narrow in all directions, if people who are not familiar with the road come in, they will follow the maze like that. Because of this, idle people in the society will occasionally gather at the entrance of the alley to block the nearby students to ask for money and things, and if someone comes to take care of them, they will run, and they will not be able to catch up at all.

These people are not very old, many of them are students who have dropped out of nearby middle schools, and some young people who have just stepped into society. Shen Zilu didn't look down on their approach, he simply relied on the strength of the crowd to bully weak primary school students, thinking that he was dressed in black and thought that he would be Chen Haonan, don't be funny! In Shen Zilu's heart, Chen Haonan represents not only the gang boss, but also the affectionate handouts, courage and resourcefulness.

Seeing Guan Zhengxing being pushed into the alley, Shen Zilu rode a bicycle and ran there, just pedaling a step on the bicycle and suddenly stopped, Shen Zilu was forced to prop one leg on the ground, and turned around to see Tan Xiao pulling her back seat, "What are you doing!" I almost fell. ”

"Don't go over," Tan Xiao let go of his hand, "Didn't you see that they were all walking around?" ”

Shen Zilu said: "He is a classmate in our class, do you not help when he sees you?" ”

"How can I help?" Tan Xiao stopped in front of Shen Zilu's car, "Let him cow, someone will clean him up." ”

"Why are you like that?"

"What am I? He doesn't have a good relationship with us, he doesn't fit in, and he still expects others to help him if something happens? ”