Bite......

The class bell rang for a long time, and a slightly chubby middle-aged man walked into the classroom slowly. Pen & Fun & Pavilion www.biquge.info

He put a test paper under his arm on the lectern, glanced at the students sitting below, and said, "The summer vacation is over, and now that I have arrived at school, my classmates have taken back their hearts for me." You're in your third year of high school now, and the only thing you have to do is study hard......

Okay, let's start the class now......"

Clearing his throat, the middle-aged man continued: "Okay, now everyone takes out the math test paper that was sent before the holiday last week, and today we will talk about the test paper." ”

The middle-aged man's voice fell, and a noisy sound sounded in the classroom, and the students took out the test papers from their schoolbags and put them on the tables.

Chen Jiayao also took out the test paper from her schoolbag, and her pretty face still looked listless, looking a little excited.

A girl at the same table saw it and asked with some concern: "What's wrong Yaoyao, are you not feeling well, do you want me to accompany you to the infirmary to have a look?" ”

As Chen Jiayao's tablemate and best friend, she is worried that Chen Jiayao has not yet come out of the last hijacking incident.

Chen Jiayao glanced up at the math teacher, shook her head and said, "It's okay, I just don't want to listen to that guy." ”

The girl looked at the middle-aged man who was picking his nostrils with his little thumb while his classmates were not paying attention, and immediately knew why Chen Jiayao was in a bad mood.

"It's been a semester, he won't hold a grudge like this, right?" The girl stuck out her tongue and said, "Yaoyao, hurry up and take a look at all the difficult questions on the test paper, in case he calls you again in a while, it won't be good." ”

Obviously, as Chen Jiayao's classmate, this girl also knows that the math teacher likes to ask Chen Jiayao, who once offended him, to answer some super difficult questions.

"It's okay, he can call it if he likes." Chen Jiayao looked indifferent.

She is really fearless, because of this test paper, Li Mingxuan has already explained every question to her very thoroughly, and even excavated some small knowledge points extended from each question, to put it mildly, this class, even if she is allowed to talk about it, there is no problem.

"Okay...... I hope he doesn't call you." The girls at the same table could only smile helplessly.

"Okay, now let's move on to the first question."

On the podium, the middle-aged teacher said slowly: "If you know the ...... function, its inverse function is ......, then the function ...... The definition domain and value range of are ....... ”

"This question is obviously a scoring question!

This question has been tested for three consecutive years, and it will definitely be taken this year, and the five points are placed here, do you like to remember it......"

"This question is very simple, I won't talk about it, come, Li Xiaobo, you come up and talk about this question."

The middle-aged teacher put down the paper and casually pointed to a boy with glasses in the front row.

Seeing that the topic he was talking about was very simple, the little boy breathed a sigh of relief, walked up to the podium in a hurry, took out a piece of chalk from the chalk box, and quickly counted it on the blackboard.

Three minutes later.

"Very good, this question is calculated like this, and Li Xiaobo did it correctly. Alright, you go down. The middle-aged teacher nodded with satisfaction and waved his hand to the little boy on the podium.

The little boy was relieved and quickly ran off the podium.

"Alright, now let's move on to the second question ......"

"Well, the classmate behind Li Xiaobo, you can go up and write this question."

……

……

"The math teacher is so lazy, every time he asks us to go up to solve the problem, saying that it is to train us, but in fact, he doesn't want to do it himself."

"I heard that he is a relative of the principal, and he came in through the back door last year, otherwise he would not have been able to enter our school with his level."

In the corner of the back row of the classroom, two boys are whispering.

Qianzhou No. 1 Middle School is the top high school in the city, and the teachers in the school are very capable.

"Those two students in the back, what are you talking about, if you don't want to listen to the class, go out, don't affect the other students!"

The middle-aged teacher pointed at the two boys, his brow furrowed.

Seeing this, the two boys immediately shut up and made a look of listening carefully.

"Alright, let's move on to the last fill-in-the-blank question."

The middle-aged teacher didn't say anything more, looked at the test paper, and read: "There are 100 balls in the bag, 40 white balls, and 60 black balls, and if you don't put back and take 20 balls, the probability of getting the white ball for the twentieth time is __." ”

"This question is a permutation and combination problem, permutations and combinations we just learned last semester, students should not be unfamiliar, I plan to let another student come up and talk about this problem."

The middle-aged teacher's eyes began to scan the classroom again.

This time, the students who were still listening carefully lowered their heads one after another, and none of them dared to make eye contact with him.

"Don't call me, don't call me ......"

Their little hearts were pounding, and they were secretly praying in their hearts.

Even the girl in the front row with thick glasses and the best math score bowed her head.

Obviously, she won't be able to do this either.

She is no stranger to the problem of permutations and combinations of balls, and if the condition of "no return" is changed to "there is return", then she can immediately come up with the answer of 40/100.

However, the difficulty of this question lies in the fact that the conditions of the question are not so simple.

She didn't know what the answer was, it wouldn't be 40/100 anyway.

This question doesn't even know how to be a top student, let alone other students.

All they can do now is pray.

However, thinking of the math teacher's routine, they would usually find Chen Jiayao when they encountered problems, and their hearts were relieved again.

As if God heard their call, the middle-aged teacher's eyes glanced at the classroom, and finally fixed on a person's body.

"Chen Jiayao, come up and talk about this question."

The hearts of the other students finally relaxed, and they raised their heads with relaxed expressions on their faces.

But at the same time, their hearts began to sympathize with Chen Jiayao again.

You say it's not good for you to offend anyone, offend this careful-eyed fellow.

Originally, Chen Jiayao's grades were among the best in the class, and her math was even more powerful, but after only one semester, her grades plummeted, especially in math Last year, her math score seemed to be only a little above the passing line, right?

Although most of the questions in last year's math test were permutations and combinations, for an honor student like her who is expected to be admitted to those super prestigious schools, that hope is now gone.

If it weren't for the fact that the math teacher always deliberately made things difficult for her in class, making him lose interest in math, I'm afraid she would have hoped to compete for the first place in the grade.

……

……

Chen Jiayao was not surprised that the math teacher asked her to solve this problem, but she would be surprised if this guy didn't call herself.

She simply got up from her seat and walked over to the podium.

The girls at the same table looked at her with some concern, and they had already scolded the middle-aged teacher in their hearts.