After one-third of the onlookers had done the experiment of spraying rainbows with their mouths, Dang Aiguo announced the class again. He was a teacher who was not only delayed class but also delayed get out of class. Fortunately, he was the principal himself, otherwise the principal would definitely kick out of the education team such as a teacher who had no idea of ​​time.

"Okay, it's your turn to do artificial rainbow experiments, you can do it yourself after class. You can also summarize what conditions are most likely to appear rainbows."

The Dang Patriotic stood on the podium and looked at the people floating in the audience, soothing them. The students were all very reluctant at first, but later they still quietly squeezed to the students doing the experiment with some thoughts, hoping that the students who finished the experiment would hand the bowl to him. Although the older middle-aged students were still reserved and just watched a little far away, this was already a great improvement.

"And if you are clever enough, you can design machines specially used to make rainbows. If anyone designs them, you can show them to me. If it is not expensive, I will ask the craftsman from our school-run factory to make them for him."

As he was talking, the Party Patriotic had a flash of inspiration and took the opportunity to encourage them to try designing a machine. Unfortunately, Zhuge Liang and the legendary Huang Yueying were still 12 years old. I wonder if there are any students now who are very talented or interested in mechanical design. Although the Party Patriotic does not want to train them into engineers or something, students who are interested in machinery are always more in line with his plan.

"headmaster!"

As soon as the voice of Party Patriotic was finished, Sun Ce raised his hand and shouted again. After this boy had done the rainbow experiment, the psychological distance between him and Party Patriotic was much closer, and he began to be unruly. Sun Jian, who was sitting in the back row of the classroom, made up his mind to teach this stupid son a lesson when he went back. It was a love affair with the leader, and it was your duty to be respectful to the leader, let alone this teacher, how could he be so big or small?

Although Sun Jian was complaining in his heart, Sun Ce did not feel chilled all over and could not help but shiver or sneeze. Haha, how could such unscientific things happen? They are just superstition, superstition.

"Ah...ah-chub-chub-!"

"Ahhhhh--!"

At this moment, Sun Ce, who was holding his hands high, suddenly felt sore and itchy in his nose. He sneezes without giving someone face, and dragged a long tail sound, just like a performing opera. Da Qiao, who was sitting in front of Sun Ce, felt a coldness behind his neck, immediately jumped up screaming, covered his neck and turned around, and looked at Sun Ce with an innocent face, and a few fluorescent lights appeared in his beautiful eyes.

But this is not a affectionate look, but an extremely resentful look. Any beautiful girl who is sneezed from behind and penetrated her neck must be so annoyed. Especially when Da Qiao turned her head, she saw Sun Ce's nose water flowing out of her nose hanging on her chin. Relying on the inertia of free falling, she kept pulling out a shiny thin silk. She felt very disgusting, and immediately took out a handkerchief and wiped her neck hard, almost rubbing her delicate skin.

"Yes, I'm sorry..."

Even Sun Ce did not have such a big nerve or thick skin to smile with a cheerful smile. By the way, even his good brother Zhou Yu, if Sun Ce sneeze hits the other person's face, it is not a matter of laughing. If a person who can do this to the point of spitting on his face is not a villain with ulterior motives and tolerant, then he is a super pervert, or he may be someone's good friend.

"Oh, it's all my fault, I blame me! I just did so many artificial rainbow experiments. The classroom was so damp, and the windows were open, it was so easy to catch a cold. But Bo Fu, you should wear more clothes, don't rely on the young people's firepower to resist. 'Cover spring and cold in autumn, and don't touch all diseases'. That's right... Xiao Qiao, take your sister out and ask someone to get some hot water to wipe your neck."

Seeing Sun Ce, a cheerful boy, turned into a red dull gourd, and he didn't know what to do. The Party Patriotic took the initiative to step forward and took the mistake on him. Then he sent Xiao Qiao to pull Da Qiao out, avoiding this embarrassing scene. Sun Ce, who felt a fever in his ear, quietly wiped his clear nose and lowered his head and fistula, rarely giving him a fistula.

"Bo Fu, Bo Fu! Sun Ce Bo Fu!"

After watching Xiao Qiao and Da Qiao go out, Dang Maiguo turned his head and called Sun Ce three times. The other party raised his head in a daze. It seemed that the young man was indeed hit hard. Dang Maiguo pretended to be nothing and asked him: "Bo Fu, what question did you want to ask just now?"

"Ah? Ah... I want to ask if the school-run factory... are the various workshops called 'factories' built by the principal outside Luoyang City."

Sun Ce, who was a little stunned, answered Dang's Aiguo question in a daze. Seeing his seemingly lost reaction, he would be unable to recover for a while. Sun Jian, who was sitting in the back row, saw the stupid look of the unfilial son who was embarrassed by him, shyly lowered his head and covered his face with his hands. He had no shame to see anyone. His reputation as Sun Wentai, the tiger of Jiangdong, was thrown away by his stupid son.

"It turns out that this is the problem. Yes, the school-run factories I mentioned are the newly established workshops in various industries around Luoyang. However, unlike traditional small workshop production, there are more people working in the factory, the division of labor is clearer, the manufacturing standards are stricter, and the costs are cheaper. And various machines are also started to be used for production. In some of our future courses, we will also lead you to visit those factories."

After briefly explaining the difference between factories and workshops, Dang Aiguo clapped his hands and attracted the students' attention to himself again. Then he said, "Okay, now that class starts, don't care about other things, focus all your attention. Look at me - everyone looks at me."

The words of the Party Patriotic seem to be suspected of playing make the students feel a little funny - although they don’t know what the Party’s play is, they just think that the Party Principal’s words are a bit exaggerated and a bit shameless. However, the Party Patriotic did not care about it. The method to attract students’ attention is a good way, which is also a trick he learned from a teacher in his past without realizing it.

For students, teachers are really like parents, and are the objects of all-round learning and imitation for children. Their inadvertent words and deeds may have a lifelong impact on their children. Unfortunately, in today's "education industry", students seem to have become more objects of profit extraction, and teachers, the "last conscience of China", have also begun to rot and deteriorate.

After successfully attracting the attention of the students who smiled unconsciously, Dang Aiguo picked up the brush that had been washed out by Jian Shuo and Bi Lan during the break. However, he did not dip the ink, but used the brush as a teaching stick and used the pen to point the simple picture that explained the principle of rainbow formation before using the pen holder.

"Yesterday I also showed you the map and solar system mode. The planet we are in is a sphere like the moon, the Earth's satellite. Whether you believe it or not, the fact is that, you can find a way to verify it slowly in the future. Practice is the only criterion for testing the truth - of course, you must practice it correctly to be useful.

I also told you that the sky is like egg whites and the ground is like egg yolks. This is the structure of the earth's sphere. Egg whites surround the earth and allow us to breathe, while egg yolks are the land we step on. Air is actually a substance. When sunlight can pass through the air, it means that air also has certain characteristics of transparent substances - that is, the characteristic of refracting sunlight."

Dang Aiguo lit the simple picture with his pen holder and explained it for a few words, then paused and signaled Xiao Qiao and Da Qiao who were standing at the door to return to their seats.

Then he turned around and dipped some ink with a pen, his eyes widened with a serious expression, and his eyes were widened with some exaggeration. He turned his attention to the students who turned to Da Qiao and Sun Ce, "Be careful, pay attention! Look at me, who do you see if you don't look at me? Wei Yan and Gan Ning, just say you two! Look at Ling Ming next to you, I wondered, it's just like a young man, how can he be a silver man? "

The Party patriotic quoted a coma in a strange way, criticizing Wei Yan and Gan Ning as if they were jokingly. Unfortunately, all the students didn't know the ins and outs of this combo, but they just thought that the strange words of the President Party seemed quite interesting.

However, sitting next to Wei Yan, Pang De, who was also shot while lying, felt even more embarrassed than the two boys who were heartless and cheeky and giggled and confused. The somewhat exaggerated praise of the Party Patriotic Republic made him a little panic-who said he was an honest man?

"Okay, okay, I'll see it all over. I've waited until the flowers faded. Draw a circle in this picture just now, and the water droplets become the earth. Draw a circle at the source of this light, and this is the sun. Have you seen it? The light emitted by the sun will be refracted by the air when it reaches the earth.

Because the refractive index of blue light is just right, the sky we see is blue. The sea is blue and the same principle. The colors of sea water of different shades are also different. It is not just reflecting the blue of the sky. In the morning and evening, the sky is red. This is because the angle of light is changed, so the red light is refracted into our eyes. At this time, the sea in the distance is also red and black, but because it reflects the color of the sky."

The Party Patriotic said this, and the students also listened to it with great interest. If we just talk about the lecture, the Party Patriotic looked a little bit, but unfortunately, the reason why the sky and the sea are blue is actually wrong. When some students study and think deeply, they will probably find the contradictions that he cannot justify himself. However, for a cyber policeman who has graduated from the computer major for five or six years, he cannot ask him to be higher, right?
Chapter completed!