"Let's see why there is no. You can tell by drawing a stroke that this problem can be transformed into whether you can complete these connections in one stroke. And more than two points pass through the line segments are odd numbers. So it is impossible to complete them in one stroke."
Teacher Ning said the answers were complete, and the students suddenly realized.
Is graph theory really difficult? Now it seems that the first problem from the beginning of graph theory is not called difficult, it should be called interesting. After all, such a classic mathematical graph theory case will be included in the sixth grade textbook of primary school mathematics and even in the third grade of primary school mathematics. Yes, this is the difficulty of a primary school mathematics problem, but most of the officers who went to school here have not read much due to the conditions in that era, so they don’t know.
From shallow to deep, rather than boasting. Other teachers watching the class outside the classroom nodded and praised.
"Teacher Ning has a good voice and has a very good grasp of the classroom rhythm. Teacher Jiang, you should learn more about other people's teaching skills when you are with Teacher Ning."
"Yes!" Jiang Wenli saluted the leader.
Ma Xiaoli sighed, even if it was not difficult math problems, she knew them, but as long as she listened to Teacher Ning’s lecture, she would be fascinated unconsciously. Unfortunately, she and her tutor had something to do, so she had to leave first.
Only Jiang Wenli was left at the scene, and after the class was over, he walked into the classroom with Ning Yunxi.
"Goodbye, teacher!" The students stood up and saluted Teacher Ning who had finished the lecture.
Ning Yunxi turned around and smiled at the students, leaving with Jiang Wenli.
When I returned to the office, I didn't expect to see an acquaintance standing there.
"Teacher Ning." Miao Zhengqing shouted at her.
"Why are you here, Director Miao?" Ning Yunxi asked.
"According to your husband's instructions, I happened to come here to do something, and check your situation and condolences to you." Miao Zhengqing said.
"Nothing will happen. Teacher Jiang is here." Ning Yunxi said with a smile, and by the way, Jiang Wenli has helped her a lot.
Jiang Wenli met Miao Zhengqing opposite him. The two of them shouted almost at the same time: "It's you!"
"You know each other?" Ning Yunxi asked curiously.
Miao Zhengqing and Jiang Wenli quickly turned their heads.
What happened to these two people?
Miao Zhengqing cleared his voice: "I used to play basketball in the army and met."
"Yes, I met at that time when I played basketball." Jiang Wenli added that there was nothing else except this.
"So you are interested in the same thing?" Ning Yunxi said.
"No!" The two of them denied in unison again.
"No? Don't you all love playing basketball?"
"Oh, Teacher Ning, you don't know, she is playing basketball like a person—" Miao Zhengqing didn't finish her words and was stared at by someone, so she turned around and said, "I won't say bad things about lesbians."
"Am I afraid you will say bad things to me?" Jiang Wenli glared at him, "You are afraid that I will tell you what you did back then!"
"What did I do back then?" Miao Zhengqing couldn't help but speak louder.
"I told you, I made it clear in front of Teacher Ning. You were constantly moving in those days."
"Hey, you said you didn't talk nonsense. When did I keep doing small moves to lesbians?!" Miao Zhengqing was so anxious that he took off his hat and shouted.
"I said you keep moving around the field."
Chapter completed!