"The Pythagorean theorem is a basic geometric theorem, also known as the quotient high theorem; Jiang Mingzu in the Three Kingdoms period of the East made a detailed note on the Pythagorean theorem in the "Jiang Mingzu Sutra" and gave another proof. The sum of the squares of the two right-angled sides (i.e., "hooks", "strands") sides of a right triangle is equal to the square of the sides of the hypotenuse (i.e., "chord"). That is, if the two right-angled sides of a right-angled triangle are a and b, and the hypotenuse is c, then a^+b^=c^. The Pythagorean theorem has about 400 ways to prove it, making it one of the most provable theorems in mathematics. Pythagorean array is a positive integer array of a2 + b2 = c2 (a, b, c). It's the Pythagorean number. "Let's think about what values can form the Pythagorean theorem?" Teacher Bao asked. “……”“3，4，5。” "Yes, Dongcheng." Dong Chengcheng is the boy who looks cool and likes everything first. Come on" Anything else?" "Jaykay." Jie Kai is the class grass in the class, tall and handsome, good grades, good sports, good popularity, poor talent, talent class is in the second grade, and there is no such course in the first grade. “5，12，13.”“ Well...... Good...... Tough guy. "9,12,15." "Anything else?" Temple. ""6,8,10""Hmm...... Let's try to do the math. ”“8,15,17.”……

"Jingle bells, jingle bells......" "Class, class." The noisy recess quieted down as the bell rang, and the noisy students returned to their seats. This is a history lesson. "Alright, alright, everybody is back to their seats, class, class." A chubby female teacher stands on the podium table, like a fat sister-in-law everywhere, we call her "Teacher Xiaofang." "Don't look at Teacher Xiaofang is very ordinary, but she is very knowledgeable, knowledgeable, close to others, often tell us some big truths, students are not afraid of her, we will ask Teacher Xiaofang if there is something I don't understand.

"In the last class we talked about ancient history. Everyone knows our ideas very well, let's first go to ancient history, then modern history, and finally modern history. Due to the limitation of class time, we do not explain prehistory in a classroom way, but set aside time to prevent going out to visit museums. The exact time is to be determined. "When we heard this, we started chattering." What is a museum? "Do you want to go out?" "Great, no classes." "I hope time flies soon." ……

"Alright, alright. Everyone began to listen carefully. "Please turn to page 4 of the textbook, The Origin of Mankind."

"The history of mankind began with the emergence of man. How human beings originated has always been a legend and debate. ”

"How humans came into being. Anthropologists, archaeologists, historians, biologists, chemists, and even philosophers and religious scholars have studied the origin of human beings from various angles, but there is still no most convincing statement. Myths and legends about the origin of mankind are abundant among various ethnic groups, some of which are quite similar, and of course there are many differences.

Summarizing various myths, the origin of human beings can be divided into five types: "called out", "originally existed", "plant-in-law", "animal-in-law", and "earth-in-earth". ”

"When the gods say that there are people, they come out."

"People are meant to exist."

"Man grows from plants."

"Man is made of animals."

"Man is made of clay."

"Correspondence separately."

—Creationism, where man was created by God. All things were created by God. The precise organs, the mystery of life, lead people to believe that man was created by God. (Since man was created by God, who created the world?) The world was created by God, so what did God create? It is bound to fall into a cycle of death, with one end being God as the "God of creation" and one end being the "beginning of the world", i.e., nothingness. ……”

"Man exists from the beginning, man appears when the world appears, man destroys and the world destroys." (Because ideas cannot be transmitted, we cannot derive the thoughts of others, and each individual is an independent being.) True or false, true is "true"? "False is "fake"? I can't tell that maybe your death represents the destruction of the world. ）

"—The seeds of the World Tree have distinguished their fruits, and the fruits have given birth to the world." The seeds of the tree of life give birth to the fruits, and the fruits give birth to human beings. The elves believed that they were born from the fruit of the tree. (Outer space, the invention of the microscope proves this, we are just small bugs in the fruit, because we are too small and too small...... ）

"—humans are no different from other animals." (We are also an animal)

"God made man. The myth of Sira. Oriental legend Nuwa created man. Nuwa grabbed the soil in this desolate world, put it on the ground, and when the wind blew, it became a living thing, so she named it "Ren". (When it comes to theism and inorganism, man is born of inorganic matter, and inorganic matter gives birth to organic matter.) But how exactly does organic matter come about? ）

"The beginning of life is a miracle, but the end is also a necessity. Birth, old age, sickness and death are a natural law. ”

"Teacher, what if you die?"

"Forehead......" Teacher Xiaofang stood at the front of the classroom, wearing a pair of glasses, facing this question Teacher Xiaofang thought about it, and his fleshy face showed a kind of confusion and, of course, "Of course I chose to die." I'm not afraid of death. Aging, sickness and death are a natural law of nature......"

No one is not afraid of death, and no one can not die, it is human instinct to be afraid of death, but death is predestined. Teacher Xiaofang, this is not only a kind of helplessness, but also shows a free and easy image, which left a deep impression in my heart.

"Because of the fear of death, people must first understand life if they want to have eternal life, and in order to understand the meaning of life, they are curious about the world, they are curious about the world, they are eager to explore and they are curious, and scientists are dedicated to exploring where people come from. From the unknown to the known, from before zero, from before the self to find the answer, how difficult it is to find the answer. Inevitably, various theories will arise. Presented below are the most recognized theories at present.

- Theory of biological evolution. Man was transformed from apes. ”

"The first humans were ape-men, and then evolved into Homo erectus, early Homo sapiens, late Homo sapiens. The creation of humans is the same as that of other organisms: genetic variation.

The first humans were born out of "genetic variation of new species". Modern humans are the result of the continuous optimization of "genetic variation of the same species" after new species."

…………

"Heiichi, let's go out and play." It was my good friend, Scud, Philips. He is called a Scud not because he is the fastest, but because he is the most dashing......

"Okay." "What are you going out to play in such good weather?" I sat in my seat. "Hmph, hum, hum~" Feilipu laughed treacherously. "See what this is?" "Hmph......" I glanced at disdainfully, "What the hell......" suddenly my eyes widened. "It's ......" The sound of our voice caught the girl at my table, Lina, who stole a glance.

"Here's a card—Pokémon!!" "What kind of card are you, let me see!" I took the Philips card, and it turned out to be a three-star - Crypt Spider. "Number 504 - Electric Spider, Electric Spider Pokémon. The evolutionary type of the electric bug. Set traps with electrified spider silk to electrocute enemies or prey. ”

It's an electric spider, and it's the first time I've ever seen such a high-level card. I was surprised and gave it back to Philips. Philips was happy to enjoy my surprise. "Let's go, I'll take you somewhere." "Let's go." "I'll go too." Her male table, Wan Bo, said. The classroom was still full of people, and Lina was the only one in her seat.

Following Philips and a few of us down the corridor on the first floor, out of the school building, through the tree-lined paths, and straight to the secret garden. The entrance to the Secret Garden is a black iron canopy fence with a prominent flower-like pattern wound around the very top, and finally two opposing buds are derived, spitting out the words "Secret Garden". Hence the secret garden. As soon as you enter the secret garden, it is no longer a marble road, but a flower street paving, with regular bricks as the bones, and irregular wooden planks and tiles to form a mat pattern. Along this road, the two sides are separated from the green grass by rows of holly planted so that passers-by do not trample on them at will. The Secret Garden is a beautiful garden with a large number of roses, lilies, cherry blossoms, osmanthus, and large trees such as willows, pines, and banyans. The largest of them is in the middle of the meadow in the Secret Garden, and all the ground is vacated for it to grow.

Of course we didn't go there, it was too conspicuous, and we followed the path into a pine forest behind a rockery. Suddenly, another world appeared. "Wow, that's a lot of people." I went into the woods and saw a figure crouching or kneeling or sitting on the ground. There are men and women, there are seniors and juniors, like-minded people gather together, because of the same hobby, breaking the confinement of distance between each other, that is the card. Pokémon, it's amazing!

"Shall I trade my teal for your walking grass?" [The Water Duck is a water-type and flying-type Pokémon, numbered 580, and is a Pokémon that is better at swimming than flying. Among them, the diving ability is particularly strong, and it is said that this ability is so developed because it wants to eat the moss that it loves to eat in the water. In addition, baby ducks can use their feathers all over their bodies to emit water splashes to create water mist. If you are attacked by an enemy, you will use the mist as a smoke grenade and take advantage of this opportunity to run away. This is a Pokémon with a personality that is easy to get close to, so it is easy for novice trainers to train it. [The walking grass resembles a bulb of a plant with round legs, and it has eyes in the shape of red beads.] The walking grass pulls out five green leaves from its head, and the middle leaf bends backwards at the top. "Walking grass is a rare Pokémon, but the water duck is a water type and a flying type that will evolve into the chief swan. Flying Pokémon are theoretically rare Pokémon. So the two cards are about the same. "It's better to see if you like it or not." "Let's compare our decks......" "I still like my walking grass."

A few of us walked around and around admiring other people's cards. "Little Saw Crocodile, Fast Swimming Frog, Large-mouthed Bat, Little Fist Stone...... These Pokémon all over the world are gathered on the card, so that ignorant children can understand their attributes and introductions, and let us know that there are not only humans but also other races, creatures, and unknown Pokémon that have not yet been discovered and live with us in this world. Pokémon cards, a card where you can learn about Pokémon, and one day, those who have dreams will embark on an adventurous journey. By the way, is there a card introduction for my Pikachu, I thought. I have all the cards in my house, only 20 of them, and it would be nice if I brought them to school. "Fish-Man Baby, Fish-Man Soldiers, and Sky Castle...... "I miss those cards in my house.

When it was almost time for class, the students went out of the pine forest and went back to their respective teaching buildings.

"Whew~~" The temperature is starting to cool down. A cold wind from the Northwest Orc Plateau swept south, from west to south. Snow has already begun to fall in remote countries and regions. The city of Roland in the Twin Moon Empire has also begun to cool down gradually. "Well, it's been cooling down recently, everyone should get dressed, get up on time, can't be late for class, drink plenty of boiled water, pay attention to safety when going out, and go to the infirm......ary quickly if you get sick and have a cold," Teacher Bao began to give a speech as soon as he started class. There was a lot of muttering.

Sitting below, we began to be in a daze for five minutes, and we will definitely not finish talking in five minutes. "Okay, do you remember?" "Remember~~" "Okay, that's it. Start the class. This time we're talking about the 99 multiplication table......"

"The multiplication formula is the basic calculation rules for multiplication, division, square and other operations in ancient CHINA, which has been used for 2000 years......"

After the math class, it is a Chinese class, and after the Chinese class, it is time to eat lunch. Afternoons are extracurricular activities.

This time, Mr. Bao is going to hang out with us - out to fly kites. Teacher Bao took the lead, and our class happily followed Teacher Bao to the playground. Because there are only 5 kites, 3 boys and 2 girls, there are basically 5 or 6 people in a group.

The breeze was cool, but the playground was full in the afternoon. Running, playing games, playing ball, slapstick, noise, laughter, and human voices, like the sunshine and ears of rice, warm and beautiful.

I was assigned to Philips, Jacques, Macho, Wanbo, and Big Head groups. With a macho man, he is not afraid of anything. While the other groups were still discussing who to put it and how to put it, our macho man yelled "hohohoh~~~~" and ran with the kite, "Wow, it's flying, it's flying." Everyone exclaimed. The white triangular kite flutters in the wind, "Release the line!" Pay-off! ", ride the wind, climb the wind, and form a beautiful landscape." Hahaha. "We got carried away with our joy." Teacher Bao, Teacher Bao, help us put it, help us put it. The girl on the other side began to shout. Do you want me to help you? ”

It was the boy who used to like to look at Tiangong in a daze and walked over, his name was Chen Dongdong. We call him the melon head. "Uh...... Will you get it? Rainbow, the braided girl, looked at him with disdain. Yes, yes, of course. The winter melon said to the rainbow, but his eyes secretly turned to the Tiangong Lily next to him, and when he saw the Tiangong Lily looking at him, he quickly stood up straight. Forehead...... Okay, okay...... Hurry up and help us get it. We're going to play it too. Rainbow said, waving. Good, good, good. Winter melon head responded with a smile on his face, squatting down and getting busy. The winter melon head was very attentive on the girl's side, and the members of his group were angry with him, and he didn't finish it on his side, but the person was gone, and he would definitely kill him when he came back.

"Oops. Everyone had a lot of fun today~o" The puppet teacher came over. "Puppet teacher." "Puppet teacher." The puppet teacher is very popular among girls, although he is a bit poisonous, but who made him cute. "It's been a long time since I've been in the sun, and I'm going to have bugs all over my body, so I'll just sit here, and you guys go play." The puppet teacher sat casually on the sidelines.

There are flowers in spring, there are moons in summer, cool breeze in autumn and snow in winter, if there is nothing to worry about, it is a good season for life.

Seeing this scene of students being free and happy, even if the weather is cold, my heart is warm.

"Oh no, not good." During recess, students are playing in the classroom. Suddenly, the classroom door was opened, and Philips screamed in a panicked classroom, "Winter melon head is fighting with someone!" The winter melon head was beaten! ”