When the big detective hits the tow bottle

The school grass whispered angrily: "Don't be complacent, Le Tian, ​​I will definitely squeeze you out this time, just wait and see!"

The invigilator coughed twice, and said seriously: "A few students pay attention to the discipline in the examination room!" Letian made a face at the school grass, and turned his head to look at his paper.This subject is mathematics, and the first few fill-in-the-blank questions are barely satisfactory. Letian finished it quickly, intending to spare time for the big questions that bother me the most. Every time, I couldn’t finish the paper because I got stuck on the big questions.However, the moment he saw the first big question, Le Tian was shocked——

“已知等差数列{an}的公差不为零,a3=5,且a1，a2,a5成等比数列，求……”

Song Dong's voice seemed to be still echoing in Le Tian's ears: "This arithmetic sequence question will definitely be tested. Listen to it carefully. The first question just needs to apply the general term formula. The key lies in the second question. Let you ask for help. } and the sum of the first n items of the series {bn}, when you see this kind of question, don’t be frightened by the appearance of {bn}, and silently recite "everything is the same" three times in your heart, you will find that even if {bn} No matter how complicated it is, no matter the four arithmetic operations or the constructor, you can always find a way to get {an} through {bn}, and then use the results of the first small question to quickly solve this routine problem. Well, Don't look at me with that kind of eyes, and write the general term formula ten times silently."

Le Tian picked up a pen and wrote the formula in the answer area, and mechanically solved the question according to the plan that Song Dong said in his impression.Move your gaze downwards, the second question...

In his mind, Song Dong tapped the table and said: "Don't yawn, look at this solid geometry problem, I will put my words here, it must be tested. It's still the same old saying, never changing. It's very simple, you just..."

Le Tian was dumbfounded, his mouth was so wide that he could put an egg in it—isn’t the very familiar question in front of him to prove that the X plane is perpendicular to the Y plane, the “must test” that Song Dong said?There was a low sigh from behind, obviously the school grassroots also managed to do a problem, but it didn't seem to go well.Letian tried to make an auxiliary line according to Song Dong's plan, after much deliberation, he actually made it.

If you want to do the second big question according to Lotte's usual level, basically the end bell should ring, but now when you look up, there is still more than half an hour.With plenty of time, Le Tian was flattered to look at the third big question that he had never had the chance to get involved in.

"If you encounter a question about finding an elliptic equation, remember, no matter how fancy the question is, rely on those few theorems. Lotte, you must know that the test is not passive, just like answering a reading comprehension question. Understand the intention of the questioner through the question, and find the "starting point" set by his hard thinking and meditation, then you will solve this question. So, you try to find the questioner's intention from the stem of the question intention."

Finding the slope of the straight line PB on the ellipse, Le Tian's brain is running fast, so what is the intention of the questioner?Is it really to find the slope of PB, or can it be transformed into a vector analysis question through PB, and the simultaneous equation with the elliptic equation in the first question, so that multiple knowledge points can be tested in the same question?

Yes, that's it!When Le Tian slapped his thigh, he suddenly felt a hearty sense of smoothness, thinking that you, an old man who made a question, are nothing more than that.The sound of the pen tip scratching the paper was accompanied by the unbearable stomping sound. The school grass behind him seemed very anxious. Le Tian couldn't help but look back at him, and saw that he was frowning at the test paper. The expression on his face was worse than constipation. To be uncomfortable.

Letian cast a sympathetic look, turned around and began to write quickly on the answer sheet.Time passed by every minute and every second. Letian wrote the last two words "Zhengbi" on the test paper. When the bell rang at the end, the invigilator yelled to stop and began to collect the paper.

The classmates next to him complained, all crying that the exam was so difficult as to be abnormal, but Le Tian felt an unprecedented sense of fulfillment in his heart, breaking through his own limit for the first time, this feeling is really wonderful!

Song Dong sent a text message: "How is it, is it a bit difficult?"

Le Tian: "Wow, it's a difficult group, but I solved the third big problem! How about it, it's not very good!"

Song Dong replied: "(Smiling) Awesome."

Le Tian: "How about you, how did you do in the exam, how many did you do?"

Song Dong: "Not too good, I only handed in the paper 10 minutes earlier."

Lotte: "..."

Le Tian rolled his eyes, feeling aggrieved in his heart, as expected, he had nothing to say to this kind of college bully, the phone buzzed, and Song Dong texted: "Turn back." Le Tian turned his head, only to see a familiar figure standing outside the window, that person He raised his head at him and grinned.The autumn sun warmly traced his outline, refracting a colorful halo, the sun is seven colors, and he is colorful.

Le Tian threw his schoolbag on his shoulders and ran towards the man excitedly, yelling in his mouth: "University bully, you are too cheating..."

In the noisy stream of students, the two were talking and laughing as they walked. Le Tian's actions in the school's rough exam were extremely exaggerated, and Song Dong couldn't help laughing, and reached out to pat his head.

Time seems to be frozen at that moment, the scene of the two teenagers talking intimately under the sun, that is the happiest moment before the coming of the cold winter and the difficult days.

Jiangcheng No. [-] Middle School's grading efficiency was extremely fast. On the first day of winter vacation, that is, at noon on the second day after the exam, the class's WeChat group exploded.Huo Yapo sent out a form, and then said: "The grades are out, all students should inform their parents in time, this time I want to focus on a few students..."

At that time, Le Tian was eating Mala Tang with his friends, everyone looked ashamed and opened the big picture, Le Tian's hand quickly swiped down, the more he looked, the more frightened he was, why he didn't see his name This time the class is counting down?

"Hey, Tiantian, you, it's you!" The friend patted him on the shoulder excitedly, and showed him the phone screen, and saw a number in front of Lotte's name:

10.

"..." Le Tian's expression ranged from disbelief to shock, to astonishment as if he had seen a ghost, and then to ecstasy at the end, and finally he raised his hands high in excitement, and jumped up on the spot, "I wiped it, I did it? I did it Ah! I’m happy today, everyone’s Mr. Shan is here to buy it today!”

Everyone was in an uproar, and my friend slapped the table, put on airs and shouted: "Boss, let's have another bowl of maga spicy!"

"Okay!" The boss agreed happily.

Le Tian dialed the number with trembling hands: "Hey, college bully! Do what you say, go on a date tonight!"

The voice over there was unusually cold: "What?"

Le Tian exploded and said: "I agreed that I entered the top ten in the class and you will date me. Is it possible that you want to go back on your word?!"

Song Dong said calmly: "Oh, I'm sorry, I don't know about the release of the list."

Le Tian wondered: "What are you doing, you don't care about such important things, it's not like your style."

Song Dong interrupted him: "Let's not talk now, let's talk later." He hung up the phone immediately.Letian held the beeping mobile phone and petrified on the spot.

On the other side, in Song Dong's narrow home, there was a man sitting on the sofa in front of him. He was wearing a high-quality high-end suit, and his leather shoes were so shiny that a light bulb could be reflected. The man had a strong physique and a healthy wheat-colored skin. All of them can be called gentle and elegant, with good appearance, but their appearance is plain, their complexion is pale, and there is a clear dividing line between the face and neck due to the difference in color, which gives people an indescribable sense of disobedience.

This is someone he can't afford to offend, Song Dong defined in his heart.He deliberately kept a distance from the man, crossed his arms around his chest, and leaned his back against the wall, seemingly unafraid, but in fact he was trying to cover up his inner anxiety.

The man spoke, his voice was elegant and easy-going with a smile on his face: "Why, your girlfriend asked you for a date?"

"It's none of your business." Song Dong said coldly, "Please leave, this is my home."

The upper body of the man leaned back on the sofa in a relaxed manner. There was sarcasm in his eyes, but he said with a smile: "I can assure you, you will regret it."

A nameless anger hit Song Dong's heart, he suppressed his anger, and his tone became more and more serious: "I don't care who you are, please leave, no one wants to make such an inexplicable deal with you!"

"Didn't you already know who I am?" The man looked at him with a smile, "You saw it that night, didn't you?"

Song Dong's breathing stagnated, and there was fear in his eyes: "You are..."

"Wild boy." The man politely stood up and bowed, then sat down again, gracefully raising his legs, "He is one of the group of people you saw that night, remember, Song East?"

Song Dong's face gradually turned pale, and his voice trembled a little: "What exactly do you want to do, I promise I won't reveal anything about that night."

The wild boy smiled and said: "To tell you the truth, Brother Umbrella actually asked me to silence my trip today, but I regretted it the moment I saw you. You are such an innocent and clean boy, don't you?" You should die because the crowd looked at us one more time, shouldn’t you? I kindly want to give you a chance to live, and if you agree to my deal, you can live, isn’t that good?”

"Fart, what kindness are you doing?!" Song Dong roared angrily, "Let me lose my name and identity, erase all traces and leave here, and never associate with anyone I know again. What is this? It's the same as killing me What's the difference?!"

"Don't get excited, don't get excited." The wild boy reassured, "A person's life is a breath, a spirit. Could it be that you are not you if you change your name? I just want your current identity, and you can change it." Let’s start again, I will never interfere with everything in the future, how about it?”

Song Dong panted violently, gritted his teeth and said, "You are just farting! Then what about my mother, what about my college entrance examination, mine, mine..."

What about my Lotte?

"Your what?" Wild Boy looked at him with a smile, like a cheetah staring at a poor dying prey.

The author has something to say: During a monthly physics exam, the students were nervously answering the questions, when suddenly the school radio rang: "Students, please pay attention, there are errors on the papers!"Please turn to the second question on page 4, "Li Lei is walking at a speed of 2 kilometers per hour, how long does it take to walk 5 kilometers?" Please change Li Lei to Han Meimei, thank you!