"Wow, it's snowing."

"Oh really! It's snowing, it's snowing. ”

"Do you think you can accumulate this time?"

With Tang Xinhan, who was sitting by the window, he said, "It's snowing." Almost the entire third class of students crowded to the window and let out bursts of cheers.

In Shanghai, these hexagonal ice crystals have always been a rarity, and many young people who are breathless by the fast pace of the city can always smile when they see them.

Looking at Gu Fan, who was watching the snow with the same excitement as everyone else, Wu Bin patted him on the shoulder and asked, "Hey, what is snow called a phenomenon in physics?" ”

"it...... Poison you, I just want to watch the snow quietly for a while, can't you? Gu Fan turned around and said with a painful face.

"So, what's the phenomenon?" Wu Bin smiled and asked again.

"Condensation, the phenomenon of matter skipping the liquid state and directly changing from the odd table to the solid state." Gu Fan replied helplessly.

"Hmm." Wu Bin nodded with a smile, and then suddenly said sharply: "I know that Ning Hua did your tungsten question wrong last time!?" ”

"Brother, do you want to be so Spartan...... I'm just looking at the snow. Gu Fan suddenly lost his confidence.

"I'm just casually mocking you once."

And just when Gu Fan rolled his eyes and was about to fight back, Xu Bo suddenly ran over and said, "Wu Bin, are you free now?" ”

"What's wrong? Questions? Wu Bin turned around and asked.

"No, you come out for a while, I have something I want to ask you."

"The mysterious ...... Okay. After Wu Bin finished speaking, he stuffed the book into the belly of the table and followed Xu Bo out.

Coming to the end of the corridor, Xu Bo looked at the snow scene outside the window and suddenly took out a pack of spicy noodles and said to Wu Bin, "Come on?" ”

"Nothing to offer spicy strips, if you don't say anything, I don't dare to eat it." Wu Bin shook his head and said.

"Actually, it's nothing, it's just ...... Aren't you quite familiar with Pei Jiamin recently, can you help me ask...... What does she like? ”

"That's it? Okay, I'll help you ask later. As soon as Wu Bin heard that it was such a trivial matter, he smoked a spicy strip and ate it with confidence.

"Thank you in advance!" After speaking, Xu Bo stuffed the entire package of spicy noodles into Wu Bin's hand, "This package of spicy noodles is considered a deposit, and there will be heavy thanks after the matter is completed!" ”

After saying that, he ran back to the classroom like the wind.

"Well." Wu Bin chewed the spicy strip and returned to the classroom.

……

At the end of the fourth class in the afternoon, Wu Bin was about to go to the cafeteria to eat with Teacher Bi as usual, but he met Su Yun who seemed to have been waiting for a long time in the corridor.

"Hi~" Su Yun waved at Wu Bin.

"Hello Mr. Su." Wu Bin shouted politely.

"Don't be so polite with me." After Su Yun finished speaking, she took out a folder from behind her and handed it to Wu Bin and said, "Nuo, you are going to participate in the national competition, right, I got it from a senior brother, it should be helpful to you." ”

"Is it a book?" Wu Bin asked with some curiosity.

"You know it when you see it." Su Yun's tone was a little smug.

"Well, thank you, teacher." Wu Bin finished speaking and took the folder.

After opening the folder, Wu Bin only glanced at it a few times, and his eyes immediately burst into surprise.

The folder is full of very difficult physics problems, and the angles of the questions are very tricky, and the excitement is definitely not as exciting as any problem set he has ever done.

"How's that, isn't it?" Looking at Wu Bin's surprised expression, Su Yun's voice was even more proud.

"This is simply amazing, what are you doing as a senior brother, teacher?"

After so much time of competition training, Wu Bin deeply understands the preciousness of "difficult problems", so they will discuss every real question that Bi Wanqing helped him find many times, because there are only so many.

He also understands that a teacher who can solve "difficult problems" is very precious, and it can even be said that this is one of the biggest differences between competitive schools and ordinary schools.

To put it bluntly, those teachers who can make it difficult for you from all kinds of tricky angles are worth cherishing, because others don't want it!

"Secret, anyway, this one is very useful to you." Su Yun said with a wink.

"It's so useful, thank you, teacher." Wu Bin nodded for a moment, but his eyes did not leave the topic at all.

"Then, the teacher also has something he wants to trouble you, can you help?"

"Of course, students should do their teachers a favor."

"Haha, I know that you know the most reasonable, then you come to my office during your lunch break tomorrow, and I'll tell you about it." After speaking, Su Yun stretched out her hand and waved in front of Wu Bin, who was reading the question, and said, "Hey, did you hear it?" ”

"I heard it, I heard it, tomorrow during my lunch break, I remember." After Wu Bin finished speaking, he nodded again.

"Okay, then I won't delay you to read the question, let's go first."

After speaking, Su Yun looked at Wu Bin's increasingly excited expression and snickered, and slowly walked down the stairs.

……

As soon as Su Yun left, Wu Bin immediately rushed to the fifth floor with the folder, opened the door of the teacher's office and shouted, "Teacher Bi!" ”

"What's the matter, I'm so excited today, what's delicious in the cafeteria?" Bi Wanqing responded happily.

"No, no, look at this." After Wu Bin finished speaking, he spread the folder in front of Bi Wanqing.

"What, you're so excited." After Bi Wanqing finished speaking, he put on his eyes and looked at the question in the folder in front of him.

"This ...... Where did you get that? After reading the first question, Bi Wanqing asked Wu Bin with some surprise.

"What a teacher gave me, isn't it particularly good, the first two mechanics questions are simply too interesting." Wu Bin said with excitement on his face.

"It's really very good, and the level of teachers who can come up with such questions is not low." Bi Wanqing nodded very affirmatively.

At this time, Deng Xiuqin, who was about to go to dinner, couldn't help but come over with curiosity after hearing it: "What are you masters and apprentices talking about, what is so interesting." ”

"That's it, Mr. Deng." Wu Bin pointed to a mechanics question on the folder and said.

"Come on, come on, I'll take a look too." Deng Xiuqin said and leaned her head forward and looked at it seriously.

"Ouch, this question is really misleading, but it shouldn't be a problem for you." Deng Xiuqin patted Wu Bin and said.

"I'm thinking of thinking of the two-body collision as a degenerate elliptical motion right now, and I'll have to list the equations first."

"It's not that simple."

After Deng Xiuqin finished speaking, she smiled and walked away, leaving Wu Bin in confusion.

"Am I doing the wrong thing?" Wu Bin said in disbelief.

"Hahaha, Teacher Deng scares you, she likes this." Bi Wanqing said with a smile.

But just when Wu Bin was about to laugh along, Deng Xiuqin suddenly said: "There is really a more tricky way to solve this problem, you two are still studying physics, think about it, I'll eat first." With that, he walked out of the office with a smile.

At this moment, the smile on Bi Wanqing's face also disappeared, and he stared at the topic with Wu Bin.