At present, although the new textbooks have not yet arrived, Lu Hua has already given them three days of arithmetic lessons with just the lecture notes.

These older students, unlike those little children who didn't know anything, had a vague feeling that after this place was occupied by this unusual army, it was unlikely that they would retreat as easily as other Ming armies, and let this place fall into the hands of the enemy again, and recruiting them to study must have something important for them to do in the future.

Even if they are not immediately allowed to become officials, they must be positions with a much higher salary than ordinary people, and judging from the salary received by an ordinary soldier, these people will never treat people who are really willing to work hard.

Therefore, the students not only have novelty, but also cherish this learning opportunity in their hearts, and they are all carefully taking notes, practicing example problems attentively, starting from knowing Arabic numerals, using some simple addition and subtraction methods that they have learned before, and they can already use Arabic numerals to calculate in simple columns.

Speaking of which, Arabic numerals were actually introduced into our country very early, about the end of the Song Dynasty and the beginning of the Yuan Dynasty in the thirteenth century, and they were introduced from Europe, but because there was a number called "arithmetic chips" in ancient China, it was also more convenient to use, so the government at that time did not realize the great advantages of Arabic numerals in operation, and there was no timely promotion and use, and almost no one knew what Arabic numerals were.

It was not until the beginning of the twentieth century, with the absorption and introduction of foreign mathematical achievements in our country, that Arabic numerals began to be slowly used in our country.

Lu Hua felt that since God had given him the opportunity to rewrite history, how could she spoil it, even if he started teaching elementary school mathematics in later generations, he could master most of the arithmetic rules and the simplest geometric theorems in three years, right?

In addition, Lu Hua believes that some simple scientific principles and superficial mechanical principles do not need too advanced mathematical support, so in line with the principle of the unity of knowledge and action, she decided to open a little science course while learning mathematics.

Today's science class is the first session, Lu Hua has already prepared the experimental equipment, and she plans to do a few experiments for students who have never studied this kind of course first, so as to stimulate their curiosity and enthusiasm for learning.

When he received the task, Lu Hua, who was delicate, found some novelties from the "Lufeng" sea ship and warehouse and brought them to Qinzhou, intending to use them as experimental equipment.

The science class was in the laboratory, and when Lu Hua arrived, more than forty students from an intermediate class were already waiting there.

After the teacher and student met the ceremony, Lu Hua began her lecture, and today she prepared three small experiments.

"Students, what the teacher is going to do below is called a science experiment, please watch it carefully, think about what you see, and then think about why this is, and if you don't understand it, you can discuss it...... Now the teacher starts the first experiment. ”

After speaking, Lu Hua took out a white silk handkerchief from his pocket, unfolded it and raised it high, so that the students could see clearly that there was nothing on it......

Immediately afterwards, she picked up a porcelain bottle on the podium, uncorked it, poured some "clear water" liquid into an empty porcelain bowl next to it, and after dipping the handkerchief into the liquid, she lit a candle next to it, and then used a clip to pick up the handkerchief in the porcelain bowl, gently squeezed out the "water" and moved it to the top of the candle flame......

When the students saw it, a fire burst out on the handkerchief......

At this time, Lu Hua gently shook the handkerchief from side to side until the flame was extinguished, and finally, the handkerchief gently unfolded on her white and small hands...... A magical scene happened, the handkerchief in Lu Hua's hand was not only not burned, but even still white!

"Boom!" The cries of surprise rang out in the air......

Lu Hua just smiled, didn't give any explanation, and then started the second experiment.

I saw that she took out a small thin porcelain bottle from the drawer that she found out of nowhere, and in the palm of her other hand, a shelled hard-boiled egg appeared.

When she gently placed the egg on the mouth of the porcelain bottle, everyone could see clearly: the mouth of the bottle was too small, and the egg was stuck and could not fall in.

However, Lu Hua's performance below made the students very confused......

I saw her take the egg, take the porcelain vase and put it on the flame of the candle and heat it, and after a while, she put the porcelain vase upright on the table again, and put the egg back on......

The following scene made all the students open their mouths: this shelled egg actually slid into the porcelain bottle silently!

This time, there was a buzzing sound, and everyone's eyes were blank, no, they were surprised.

The third experiment was very simple, Lu Hua had placed a battery in the corner beforehand, which was the spare battery attached to the batch of Humvee military vehicles in the container.

The circuit has already been connected, Lu Hua just gently closed a small switch, and the electric light of a car next to the blackboard lit up, emitting a bright light.

At the same time, on the other side of the blackboard, a simple electric bell that Lu Hua had made for a night made a continuous tinkling sound.

"Students, why is the handkerchief not burned? Why did the eggs slip into the porcelain vase on their own? What's going on with this one called an electric light and an electric bell? Do you want to know? ”

"I want to know."

"Want to ......"

"Want to ......"

Facing more than forty pairs of eyes full of curiosity and surprise, Lu Hua smiled and said eloquently:

"This is a kind of physical phenomenon, what we are going to learn now is called physics, and if we learn it well, not only can we answer the above questions, but we can also know many other truths...... Because physics is used to explain the principle of all things, it is the study of the laws of motion and the basic structure of matter, from the stars to the subtle matter that cannot be seen by the naked eye......"

Suddenly, Lu Hua's speech came to an abrupt end!

Because, she suddenly saw a figure outside the window, a figure who thought she didn't have time to think, but was worried about every day......

That person's name is Lin Xiao! At the moment, he was smiling at her, smiling brightly, and the sun was ......

"Students, everyone...... You can discuss it when you go back, and if you don't understand it, you can study hard...... Now that class is over, everyone goes back to the classroom, and then the next session, literature class......"

……

Holding Lin Xiao's hand, Lu Hua hurriedly returned to the small courtyard where he lived.

Closing the door, Lu Huamei stared at Lin Xiao with beautiful eyes: "How are you ...... Here it is, what's wrong? ”

"Passing by, look at you."

Lin Xiao stared at the shocking face in front of him, his words were concise and to the point, and his eyes were full of smiles.

"Missed me?"

"Hmm......" Lin Xiao's eyes were full of enthusiasm, but he was already clumsy.

Lu Hua took a step forward, stretched out his slender hands, gently hugged Lin Xiao, and raised his head slightly.

Lin Xiao looked at Lu Hua's eyes, the eyes that were staring at him were full of affection, and there was a teardrop faintly hanging in the bright eyes, which was so beautiful that it was suffocating.

"I heard that Nanyang Hou ...... Martyred? ”

"Yes, he was outnumbered, and he was valiant......"

"You...... It must be good, I'll be afraid. The voice was soft but trembling.

"I know." Lin Xiao smiled and nodded.

"Kiss me ......" A dream-like voice came out, which made Lin Xiao's heart melt.

Lin Xiao gazed affectionately at the delicate and perfect face and sexy red lips, and his heart was pounding......

He also stretched out his hands, wrapped his arms around her slender waist, and then bowed his head slightly, kissing the delicate and touching place......

Aoxue is very tired these days, although she still stays up late every day, her thinking is very stagnant, and the manuscript is not increasing, please give me some encouragement, okay?

(End of chapter)