"Because I couldn't leave the school for a while, my teacher asked me to come to class on his behalf temporarily." Teacher Ming's smiling eyes seemed to be shining.

Fang Kun hugged Teacher Ming tightly, then let go and lightly beat him on the chest, "You kid, you are still the same as then, so sentimental. ”

Teacher Ming straightened his posture, "I don't feel much sentimental anymore, I just miss you too much." ”

"I won't talk to you more yet, wait until noon, call all those few, and we will bully you well."

"Good!"

Fang Kun turned around and summoned Ruan Haocheng and the others who were waiting at the door, "Come, this is your teacher Ming Yuanming." ”

Ruan Haocheng and the others saluted Mingyuan together, and said in unison: "Hello Teacher Ming!" ”

Mingyuan saluted them back, and then asked them to sit down in turn.

"We have nine high school graduates and thirteen junior high school graduates in this batch."

As Fang Kun spoke, he took out a list from his pocket and handed it to Mingyuan.

Mingyuan glanced at the list, "The basic situation The battalion commander has already told me that I will teach students according to their aptitude and will definitely live up to the battalion commander's expectations." ”

The smile on Fang Kun's face was retracted, and his face gradually became serious, "Let's work together!" ”

Fang Kun and Mingyuan didn't say much to each other, they swept over the twenty-one people sitting neatly in the classroom one by one, and finally stopped for a moment on Ruan Haocheng, Chen Zhiyun, Guo Tao, Chen Ziqiang, Wang Haonan and Wang Bin who were sitting in the front row.

"After class, you go back to the training ground together, and no one is late."

After the twenty-one people responded in unison, Fang Kun nodded like Mingyuan and walked out of the classroom.

The first thing Mingyuan did was to take the list that showed the characteristics of Ruan Haocheng and the others, and the people who needed to be guided separately in addition to the joint teaching, and began to name them one by one.

"Ruan Haocheng!"

"Here!"

"Chen Zhiyun!"

"Here!"

For the nine high school graduates, after Mingyuan ordered one, they will take a closer look at the instructions above.

After the roll call was finished, Mingyuan did not start the formal lecture, but spent nearly half an hour telling a story.

The story is not very complicated, it tells the story of a company commander who led his team to participate in the war, because their company lacked soldiers who knew how to reconnoitre, and in a battle, they strayed into the enemy's encirclement and almost wiped out their entire army.

Mingyuan told the details of the story in great detail, especially when talking about the company commander's regrets and feelings at the time, as if he was the company commander, his face was full of sadness and remorse.

After the story was told, Mingyuan paused for a moment, then stood in front of the blackboard that seemed to be temporarily nailed to the wall, and began to write.

"From this day forward, the knowledge we are about to learn, although it may not seem to you, but it has become an essential part of our lives."

The soldiers had not yet recovered from the sadness of the story, and when they heard Mingyuan say this, they all raised their heads in a daze and looked at him and the blackboard.

"The content we are going to learn today is circuits, and the students who graduated from high school should have a preliminary understanding, but they have not been able to grasp it in depth."

"Today we will start with simple circuits, the circuits of electric lights that we use every day."

Mingyuan drew series circuits and parallel circuits on the blackboard, and drew the electrical components of each circuit one by one.

When introducing each circuit, he explained the concepts of the power supply, resistors, voltages, currents, switches, and other devices and terms it contained, and introduced their functions separately.