Li Hao didn't expect someone to ask a question so soon.

After hearing the general's problem of drinking horses, Wu Lin couldn't help but shake his head: "This question is actually very simple, but it is difficult to understand and understand."

"Why do you say that?" Du Tao didn't quite understand. As a Chinese teacher, he only understood these math proper nouns.

"There are too many typical models for generals to drink horses, and there are 16 common ones. If someone deliberately asks Li Hao, maybe he will analyze these dozen models." Wu Lin expressed his concerns.

But unexpectedly, Li Hao just smiled and then said: "In fact, the problem of general drinking horses is the shortest path problem. The main basis for the problem is 'between two points, the line segment is the shortest', 'the vertical line segment is the shortest among all the line segments on the point to the straight line', and the knowledge of axial symmetry, plane expansion diagrams and other knowledge to solve it."

"In particular, we need to use axial symmetry to transform and transform space problems into plane problems to solve the shortest path problem in junior high school mathematics."

"Then I'll draw a few common models for you here. These questions have traps. Students, do you want to take notes?"

While Li Hao picked up the chalk, he also looked at the male classmate who had just asked the question.

The boy was stunned for a moment, then opened the notebook on the table and prepared to take notes.

Li Hao drew a simple model on the blackboard behind him, then turned around and said, "Let me tell you, first of all, there are two situations in two points and one line. The first is that two points are on the opposite side of a straight line, points A and B are on both sides of the straight line n. Find a point P on n to minimize PA+PB."

"I have done this type of question many times, and the basis is that the line segment between two points is the shortest. So which one is the more difficult model? That is the shortest path problem in the three-dimensional graph expansion diagram."

"Let's draw a cylinder first, where ABCD is its axis section, AB=8/π, BC=3, an ant needs to crawl from point A to point C, so what is the nearest distance."

As soon as this question came out, the students off the field immediately started to discuss it.

Because in the cognition of junior high school students, generals usually drink horses with plane dots and lines, rarely involve three-dimensional figures, and they are cylinders.

Seeing that no one seemed to be able to give the answer, Long Jiayang immediately asked Ji Mingcheng in front: "Mingcheng, can you calculate it?"

"It doesn't feel difficult, but I just can't turn my mind for a moment." Ji Mingcheng frowned and painted on the paper.

When Long Jiayang heard this, even the top students in the class had such difficulty in doing this question, he immediately became happy: "Hehe, even the top students can't do it. It seems that few of them can do it here."

He even stretched his neck and looked at Liu Xiuyuan in front of the left. He found that there was no complete answer written on her draft paper, so he became more convinced that this was a difficult problem.

But only Teacher Wu Lin laughed.

"What's wrong? It's very difficult?" Du Tao asked anxiously.

Wu Lin shook his head: "This kid is so terrible. In fact, this question is not difficult. It just converts planes into cylinders, which makes many students unable to start."

Seeing that no classmates in the audience answered, Li Hao said: "In fact, we ask the shortest distance for ants to crawl. We only need to expand the side of the cylinder and the shortest line segment between two points."

"Deploy the cylinder and connect A, C, AB=12·π·8/π=4, BC is equal to 3, AC is equal to the square of 4 below the root number plus 3, and the final result is equal to 5."

After Li Hao finally wrote the answer on the blackboard, he looked back at the boy: "Don't you understand this variant question?"

The boy seemed to blush, and he nodded at last and sat down.

In this way, in the next half hour, the students in the audience asked Li Hao five or six questions one after another, and he could answer them well, and even reserved some time to explain the extension questions to them.

His performance completely conquered the students below.

At this age of junior high school, as long as you have the level and talent, you will be respected and respected by many people.

"Baoba!!"

The students even spontaneously applauded Li Hao.

In fact, not only the students, but also the teachers standing behind were surprised.

Li Hao's condition today is like a typhoon, which is very similar to a teacher who has been engaged in education for many years, and is even more sophisticated than some teachers who have just come to the school.

The most important thing is that his lecture rhythm was just right, so that Du Tao couldn't help but sigh: "This kid, after studying, will be a teacher."

"I guess his ambition is not to be a teacher." Teacher Wu Lin narrowed his eyes and said thoughtfully.

But at this moment, a girl stood up, Li Hao looked over and found that she was a student from Class 8 again.

She said bluntly: "Just just now they were asking questions about mathematics, physics and chemistry. Can I ask you questions about liberal arts?"

Li Hao smiled bitterly in his heart: This class teacher in Class 8 is really unwilling to give up, and his soul will never fade away.

So he said, "Well..."

"Actually, I'm just a 46-year student. Not every subject is strong, otherwise I'll be the first in the grade, right?"

As soon as this sentence was released, everyone agreed. After all, boys are generally weak in liberal arts. This is also a default fact.

"But, I can do my best, you ask."

Li Hao changed his mind and faced the battle directly!

The girl seemed to be ready, so she picked up the notebook and recited: "Who is the emperor with the least concubines in the unified dynasty?"

“Wow~~”

Many students started to make excuses when they heard this question.

Because they all knew that the emperor had three thousand beauties in the harem.

If you ask the emperor with the least concubines, they really don’t know.

But the students in Class 16 gradually realized something was wrong.

"Hey, you guys say, why do the students in Class 8 always ask these strange questions?"

"Yes, even the emperor with the least concubines asked this question. How could Brother Hao know?"

"That's right, we don't test these things in our books!"

"Damn, I'll beat them up later."

Xu Zijun was very angry. In fact, as early as the third student in Class 8 asked, he realized something was wrong.

Isn’t this explicit bullying of his brothers?

Long Jiayang also said angrily: "Brother Jun, you will teach those two men a lesson later, I will do that woman."

After hearing this, Xu Zijun turned to look at Long Jiayang.

Long Jiayang immediately changed his words and said, "I mean, I will take the girls from our class to ask for an explanation from the girl, and ask for an explanation..."

When Li Hao heard this question, he was happy and then said, "Actually, the answer to this question has also appeared in history books."

"Ah? No?"

"Really or not?"

"Brave it."

Li Hao immediately wrote the three words Zhu Youzhi on the blackboard: "Zhu Youzhi, Emperor Xiaozong of Ming Dynasty!"

"He is the only monogamous emperor in history. He only has one queen, no concubine or beauty. Emperor Xiaozong of the Ming Dynasty and Empress Zhang lived together day and night, the same as ordinary people. Moreover, he is also a good emperor, diligent in political affairs, attaches importance to justice, opens up the road of speech, and strives to reverse the corruption in the court!"

As soon as this passage came out, everyone was stunned.

They think, why does Li Hao even know how many wives the emperor has?!
Chapter completed!