Teacher Xu, Please Take Care of the Reckless Students in Your Class

Gu Jijian, "No! Xu Heng is a Chinese teacher."

Everyone was stunned.

"Chinese? Wait, did I hear it right? Chinese teacher?! Xu Heng is a Chinese teacher? Are you sure?"

Gu Jijian was helpless, "Xu Heng is teaching Chinese! It's been more than a month since he came to our school for an internship. I still interviewed myself..."

This group of people was so unexpected, but it made Gu Jijian less confident.

Everyone, "%￥#@￥%*￥%..."

"What's going on here? Wei Minghai is a poor student in your school, and the teacher I want to thank is actually a Chinese teacher. This, this, this..."

Can't fix them all!

The person in charge of the Education Bureau said, "That's it! Principal Gu, I'll add you as a friend. Could you please make a video with us and find a classmate Wei Minghai?"

Gu Jijian, "This...?"

"We have something to confirm with him personally!"

Gu Jijian, "Okay!"

The two became friends with each other, and the person in charge of the Education Bureau used his personal mobile phone to project the screen to the computer in the office, and his other mobile phone was still connected to everyone.

Gu Jijian still hasn't reacted, and muttered, "What's the matter!"

On the way to Class 30, as the head of a school, he actually held a mobile phone.

When teachers and students greeted him, they were very curious, "What's wrong with the principal? Why is he holding a mobile phone? Still wearing headphones? Is it live broadcast?"

"Which class is the principal going to? Looking at this direction, are you going to class 29?"

"Class 29 is a key class, what's so strange about the principal?"

"No! He went straight through class 29 and went to class 30!"

"What is the principal going to do in Class 30?"

"It's really weird! How did the principal go back to Class 30? It's the first time I've seen you!"

"Let's go and have a look!"

PS: Thank you [tail number 1512] for the monthly pass!

Ask for all support! .

How about 17 consecutive cuts first?I have two solutions to one problem, still the shortest time! [2 more!Ask for flowers and ask for evaluation tickets]

"The principal has gone to class 30!"

"It's really weird! The principal went to Class 30!"

Not only the students were curious, but even the teachers became curious.

Han Dafang, "Are you sure you didn't visit our class 29? Are you sure the principal didn't pass by class 30?"

"Sure!"

"The principal went directly from your Class 29 without turning his head!"

Han Dafang, "%￥##@￥..."

"What's there to do in this class of 30?"

Gu Jijian had already entered Class 30 at this time, and just about to call Wei Minghai's name, a classmate greeted him.

It's He Ruohua.

"Shh!"

"Mr. Principal, please don't make a loud noise! ​​Didn't you see that the windows of our class were closed!"

"Wei Minghai is answering the quiz! It's been a 240-game winning streak!"

Gu Jijian, "???"

He held up his mobile phone and leaned over to Wei Minghai, and gave him a close-up.

At this time, Wei Minghai lowered his head and brushed the question.

Ten lines at a glance.

For fill-in-the-blank questions, those who can give the answer will give the answer directly. For some complicated questions, he also divides two by three and five, and draws a conclusion as quickly as possible.

For some proof problems, or calculation problems, he simplifies and then simplifies.

On Wei Minghai's performance paper, from the previous step to the next step, for ordinary students, it is enough for them to write two or even three steps.

His thinking span, ordinary people simply can't keep up.

题目：圆P1和圆P2外切于点R，直线l1过圆P1的圆心O1且切圆P2于点P，直线l2过圆P2的圆心O2且切圆P1于点Q。

Let l1 and l2 not be parallel, and mark their intersection as K.

Prove: If KP=KQ, then △PQR is an equilateral triangle.

After scanning the topic, Wei Minghai directly wrote down the process.