Primary school explanatory text

I believe that everyone will inevitably come into contact with or use compositions, especially widely used explanatory texts. Explanatory writing is an article genre with "explanation" as the main expression and scientific knowledge as the fundamental task, which introduces things, clarifies things and explains the laws of their movement, change and development. What are the characteristics of excellent expository writing? The following is the elementary school explanatory text I collected for you. Welcome to reading. I hope you will like it.

Primary School Expo 1 Walking on the mossy floor tiles in the maze lane, I saw black and white, simple and elegant, antique pavilions and pavilions blended with the slowly flowing canal water under the setting sun to form a dynamic and static ink painting.

Walking into a small shop, I was immediately attracted by all kinds of combs in the antique hall. The first thing that caught my eye was the characters in The Journey to the West, the innocence of Pig Bajie, the honesty of Friar Sand, the hatred of the Monkey King and the mortal eyes of Tang Priest. The "Twelve Golden Hairpins" on the side are not bad either. They have countless postures. Some hold fans and are slim; Some eyes are delicate and pathetic; Some are elegant and dignified. I can't help but marvel at these exquisite women. Other combs are equally ingenious. "Facebook" and various facial expressions of beautiful women ... these combs are vividly displayed in front of me. It's really "a hundred combs set each other off, and a thousand combs are unique", which dazzles me.

Gently stroking the comb, it feels very smooth and delicate. It is khaki and delicate in texture. It is said that the comb production in Changzhou began in the Southern and Northern Dynasties, with a history of 1500 years. The founder of the grate industry is Chen Zizi. At that time, he was unfortunately imprisoned. Because of his poor living conditions, his head was covered with lice, which made him itch terribly. On one occasion, he sorted out and pressed the grated pieces that were cracked by bamboo boards, and used them to remove lice from his head. This is the original comb. Comb is now the first choice for Changzhou people to give gifts, because it is not only a beautiful handicraft, but also can stimulate scalp nerves and prolong life! These combs are all handmade and need 72 processes. They not only adopt traditional techniques such as carving, tracing, engraving, ironing and embedding, but also add Changzhou-specific techniques such as cloisonne enamel and bamboo carving, so they have a unique style. No wonder people often say, "Yangzhou rouge Suzhou flower, Changzhou first comb." In the Qing Dynasty, in order to flatter the emperor, officials of Suzhou Weaving Institute always went to Changzhou to customize a batch of high-grade combs to pay tribute to the palace every July of the lunar calendar. The ivory comb made in Changzhou used by Li to comb the hair of Empress Dowager Cixi is still preserved in the Forbidden City in Beijing. Therefore, Changzhou comb enjoys the title of "Palace comb is famous" and "Changzhou comb is the best in the world".

"Palace comb, love with husband and wife; Changzhou specialty, flowers bloom side by side. " Changzhou specialty-comb, colorful, long history, famous at home and abroad!

Elementary school explanatory text 2 wow! It's really beautiful. Today, there is another thing on my wooden frame: "wooden sailboat"

Its hull is made of wood and painted with colored paint. It is very beautiful. There is a hole less than one centimeter in the middle of the hull. A small house was built on it, with a white roof and a hole in the white wall. With an iron bar in it and a board on its head. There is a wooden stick on the hull and a white line on the sail made of blue cloth.

As long as you turn the round board, the song "Happy Birthday" will be played, which is even funnier. Why? It turns out that there is a machine called music box in the small house. When you turn the disc, the machine will also turn, and naturally it will make a wonderful song!

What a beautiful wooden sailboat, what an interesting music box, people really figured out how to make such a good toy.

One night, the glass in a person's house suddenly turned yellow, and there was a rapid alarm. This alarm is not a thief there, but a gas leak in a family. You may be surprised to say, "How can the glass on this window call the police?" This is a modern new type of glass-"automatic alarm glass", which will give off a harsh alarm whenever gas or any toxic gas leaks at home. Why? Because the glass is equipped with dense barbed wire, once any toxic gas is emitted, the barbed wire on the glass will detect it and send a signal to the alarm at the four corners of the glass, which greatly improves the safety.

You may think, now is the outbreak of influenza A, what should I do if I have influenza virus at home? If only there were automatic detoxification glass! In fact, this kind of glass already exists. It's "automatic detoxification glass". This kind of glass can release a poisonous gas every day, which can kill all viruses. This kind of glass can not only kill viruses, but also make the air fresher.

In the new buildings of 2 1 century, new glass plays an indispensable role, and it is believed that more new glass will appear in the near future.

In this social practice, my biggest gain is that I learned to scrape wax gourd in farmhouse activities.

That day, we came to a farmer's house with wax gourd, minced meat and dumpling wrappers to study in jiaozi. I saw that the old man took out a shiny thin iron sheet with ten rows of small round holes of uniform size neatly arranged on it, and one end of these round holes tilted upward. Grandpa saw my curious expression and told me with a smile that this was a simple airplane board made by himself. As long as the food to be planed is put in these holes from top to bottom, the filaments will be planed out. Grandpa said while demonstrating. Oh, this method really works. I saw that with grandpa's rhythmic action of rubbing the wax gourd skin up and down, the wax gourd silk with uniform size obediently emerged from the small hole, and my heart itched. So, I asked grandpa to let me have a try.

However, when I was holding the wax gourd in one hand and pressing the thin iron sheet in the other, I learned from my grandfather and wiped it hard. "Oh!" I only heard a scream. I didn't expect a lot of wax gourd silk to be scraped off, but the skin on my hand was scraped off. Blood flowed down the wound and I cried. It's really "ten fingers linked to one heart"! But I held back my tears, wrapped myself in a band-aid, gritted my teeth and continued to pick up the melon planer. ...

Although I paid the price of blood, it is worthwhile to shed some blood after learning a labor skill. I am not a weak little girl.

One Sunday morning, I just woke up and was about to stretch when I suddenly found that I couldn't move. I immediately turned my eyes to myself, stunned! Originally, I found myself a tall and straight tree.

I thought to myself: since I have become a big tree, I will play this role well! On sunny days, I play games with the sun and birds. On rainy days, I compete with other big trees to see who drinks the most rain. In this way, I am very happy every day.

But one day, I was suddenly awakened by a harsh voice. I opened my eyes and found some loggers hurting my friends with saws. I want to help them, but there is nothing I can do. My heart is suffering, and I am waiting for death.

After a long time, the workers finally left. I survived with my friends who were in poor health. It turned out that because the waist was a little bent, it was "abandoned" by the woodcutter. I called my friends' names, but they all left, leaving only a bare piece. I called the birds' names again, but they also escaped because of the arrival of the lumberjack. I cried loudly for a long time.

At this moment, I suddenly woke up. It was a dream. However, I am really angry at the behavior of the lumberjack. Trees are our limited available resources and our friends. We should make reasonable arrangements to cut down trees. If trees are cut down wantonly, birds will be homeless; If trees are cut down indiscriminately, we can't keep the ecological balance and our home will become a desert.

When I grow up, I must be a tree protector and appeal to others to protect trees. Because: "protecting the forest is everyone's responsibility"!

There is a beautiful park next to my home. My friends and I often go there to play, but every time we go there to play games, we have never carefully observed them. This time, I trotted to the park and enjoyed it with a different mood.

When I arrived at the park, the first thing I saw was a 10% discount bridge. I stepped on the bridge gently and walked slowly, enjoying the scenery along the way. There is a pond under Jiuzhe Bridge. There are many small fish playing in it. They all swim under the lotus leaf and hide for a while. Spit bubbles leisurely together for a while; I played together for a while, like a lively and lovely child, so uncomfortable.

On my left, there are meadows and Kobanawa trees. Grass and flowers stretch their bodies and smile in the breeze, trees greet us with open hands in the breeze, and the wind turns into a piano, which is pleasing to the eye; Sounds very happy; It smells comfortable. And on my right, there are some equipment, where old people exercise; There are children playing there; There are couples walking on the edge, and the small flowers and grass that are trying to grow there are particularly enchanting.

Unconsciously, I have reached the top pavilion, and sitting inside, I seem to have become an ancient man, feeling elegant and classical.

I love the small park next to my home, and I love the mountains and rivers of my motherland even more!

Primary School Explanatory Text 7 Dogs were domesticated from gray wolves in the early days of human beings, and the domestication time was from 40,000 years ago to 1 year. 50,000 years ago, it was the earliest domesticated animal. According to statistics, there are more than 1400 dog breeds in the world, of which more than 500 are classified. There are about 240 famous dogs in the world. A large number of recent genetic studies show that there are about 450 kinds of dogs in existence.

Dogs have normal facial features and stronger limbs like people. They walked, staggered and very happy. Under normal circumstances, dogs are about eight centimeters long and weigh no more than 35 kilograms. ...

A dog is a lovely animal because of its flexible nature. Few dogs in the world are stupid, let alone dogs that don't like to eat or play. Not only that, the dog's response is also very agile. When seeing the appearance of mice, insects and ants, dogs will show their skills and quickly catch the "prey" that is closely watched; In the dog's sight, almost no "prey" can leave its "palm"

Dogs don't eat much, but they are very picky about food. Dogs eat about one-third of human food a day. They only eat fish, meat or other bones. Most vegetables and fruits don't like them. ...

The intelligence of dogs is also unusual in the lower animal kingdom, which is a quarter of that of higher animals-"humans". Manually trained dogs can do many difficult movements: catching small objects falling from high altitude very accurately at low altitude; Stand on tiptoe and hold human hands with both hands, just like dealing with humans. ...

Elementary school explains 8 books, what an ordinary and simple look! But it occupies a very important position in my heart.

Books are the ladder of human progress. Books are a treasure house of knowledge. They are very valuable. They can make people develop continuously and have profound knowledge. They can make stupid people smart! When I was 3 years old, I saw the first word and had an indissoluble bond with it! When I was 6 years old, everything in the book attracted me deeply. I'm excited and passionate about it!

One day at noon, grandma fell asleep and I had nothing to do, so I picked up a book and read it. At first, I just felt like I was wasting my time. Slowly, I was attracted by the story in the book and read it with relish. Time passed unconsciously and grandma got up. When she saw me reading extra-curricular books, she was very angry and shouted at me, "I told you not to read extra-curricular books. What if your grades drop?" I retorted: "reading extracurricular books can increase your knowledge and expand your knowledge." What's the matter ... "Grandma accidentally tore up the book when she was tidying it up. At this moment, it seems that my grandmother tore my heart instead of a book!

Remember, there is a poem called The Magic Book. "No special warship can take us to the vast world like a book. No magical horse can take us to understand the true meaning of the world like a poem. Even if you are poor,

No fence can stop you from roaming in the kingdom of books. What a smooth journey! But it carries all the beauty of the human soul! Books are a pair of wings of wisdom, which let us fly freely in the blue sky; Books are the ladder of knowledge, let's go up a storey still higher; Books are a learning lock, which can solve difficult problems for us.

A favorite book is a knowledgeable teacher and a "longevity fruit" of human civilization. I am willing to travel in the world of books and the ocean of knowledge.

How can you say that this is not a gift from a book? This is the story of me and the book!

When I was a child, my mother often took me to Tiger Run, which enjoyed the reputation of "the third spring in the world". People also call Longjing Tea and Tiger Running Spring "the two wonders of the West Lake".

Tiger Race is also called "Tiger Race Mooncherry". Why is it also called "Old Tiger Running Mooncherry"? According to legend, during the years, a Gao Zeng named Kong came here, because there was no water, and he wanted to move to another place to live. A fairy told him in a dream, "Master, don't worry about being moved by two tigers tomorrow." The next day, sure enough, two tigers came to dig for him and dig springs. After a while, a clear spring gushed from the ground, sweet and mellow. Hence the name: Tiger Running Spring.

Entering Tiger Run is a quiet path leading to the distance. On both sides of the path are springs that slowly flow down the mountain. There are many different trees beside the springs. The sound of spring water and the singing of birds in the forest form another landscape.

Walking into the gate, I saw a crystal clear canal on my right. The water in the canal flows slowly, just like a quiet girl walking slowly without making a sound. Looking up to the left, there are towering trees, lush and beautiful.

Tiger running spring is really a place that makes people linger!

Elementary school explanatory text 10 "Little golden jar, which contains gold and jiaozi, eats gold and jiaozi spits out white beads." Do you know what this riddle is? Yes, this is my favorite-oranges!

Oranges are round, yellow, golden and Huang Chengcheng, just like round golden seeds. Cut the orange, and the fresh orange juice keeps overflowing, which makes people drool and I want to put a piece in my mouth. Sour and sweet, really delicious!

Oranges are not only delicious, but also valuable all over. Its peel can not only be made into traditional Chinese medicine, but also be used as a seasoning for cooking. Golden juice can be used as a drink, and pulp can also supplement many vitamins that the human body needs.

This season is the season when oranges are on the market. I remember one day, my mother bought some big navel oranges, and I rushed to cut two. After cutting, I picked them up and wolfed them down. It was delicious. I ate several at once, but soon my stomach began to turn. I ran to the toilet. Mom smiled and said, "Look at you, little glutton, you have eaten too many oranges!" " ".Well, it seems that I can't eat more delicious food.

Children, after listening to my introduction, are you also in love with oranges?

Primary school expository writing 1 1 expository writing is an article genre that gives people knowledge by explaining things and clarifying things as the main expression. It explains the characteristics, essence and regularity of things by revealing concepts. Explanatory text occupies a certain weight in Chinese textbooks, so it is very important to master the writing points of explanatory text and write it well. How to instruct students to write expository essays? I think we should start with the following points.

First, pay attention to observation and grasp the characteristics of things. If you want to write a good description of things, you should first pay attention to something, because everything has its own characteristics different from others. Observation is trying to find the characteristics of things from different angles and aspects. To grasp the whole picture and the whole process of things, we should make a vertical observation, understand the ins and outs of things yesterday and today, and also make a vertical observation, understand the thing itself, and understand the relationship between this thing and other things: we should observe both the outside and the inside of things: we should have a macro observation and a micro observation. In short, the observation should be comprehensive and meticulous. Only when you really observe thoroughly can you write it. In doing so, you will find the characteristics that distinguish one thing from others.

Second, the explanation should be clear and the level should be clear. Although all kinds of things are complicated, they all have their own laws.

Primary School Expo 12 When it comes to cats, some people may immediately think of "Black Cat Sheriff". Cats are one of the animals closest to human beings, and they are often encountered in life, but they have a side that people don't know.

Humans and cats have been close partners for at least 9500 years, but cats are different from humans. They are solitary animals with fixed territory, and most of them are active at night. However, it was the cat's hunting behavior that first brought them into contact with the human environment, and the strong instinct to protect the territory drove them to appear in the same place. The history of domesticating cats is much later than that of dogs. This period may not be earlier than 7000 BC, when the "crescent-shaped rice granary" was formed in the Middle East due to the prosperity of agriculture. The appearance of houses, barns and grain shops provides a new living environment for small mammals such as mice, which are just the ideal prey for small wild cats.

The original ancestor of domestic cats is probably African wildcats, because African wildcats are only slightly bigger than domestic cats and have a gentler temperament than other wildcats. African wildcats often appear near human settlements, are easy to domesticate and are often kept as pets by local residents.

A cat is a cat. Although they are not as strong as lions and tigers, they are small and can be used for people to play and catch mice, so people like cats very much. Cats are carnivores, with a slightly larger face, and their pupils shrink and enlarge with the intensity of light. During the day, it looks like two bright green gems. At night, no matter how dark the place is, it will emit green light, which is as chilling as seeing a beast. Short limbs, with meat pads on the palms, very agile, won't make any noise, and is also a master of jumping. Cat hair has many colors, such as black, white, yellow and gray. Cats are good at catching mice. Besides meat pads, cats have some sharp claws on their limbs. There is also the energy supply of the pupil, which is conducive to catching mice. As long as mice attracted by cats have little chance to escape, cats are natural enemies of mice. Cat is a lovely animal, so people like it very much. Keeping one or several at home can entertain and catch mice, so cats are our good friends.

Elementary school explanatory text 13 I have a turtle at home. It's very cute. Let me introduce the little turtle! It has two small eyes like mung beans, a lovely mouth, a small nose, a green shell, four feet and a small tail. It becomes him.

It's timid. When someone comes, it pulls its head back until there is no sound. I have an interesting story! Every time I go out to buy things, I always disappear inexplicably and reappear the next morning. This has happened many times. In order to understand the reason, finally, I am going to kill a "comeback" one day. I pretended to go out and opened the small door to look inside. I saw the tortoise climb out of the paper box and get under the sofa. Ha! I finally know why! Later, I raised the "wall" of the carton, and this "turtle missing" never happened again.

Breastfeeding is the happiest time. First put it in a pot with a little water, throw the broken raw meat down, and it will crawl over, take a sip first, then eat half the meat, and finally swallow it. You can also put the meat in your hand, Doby. It will lie on the wall of the basin and straighten its neck, which is very funny.

We later released this little turtle. Although I put it down, I still want to!

Elementary School Explanatory Text 14 Since 1885, Karl Benz, the "father of automobiles", made the world's first tricycle, the automobile has become one of the indispensable means of transportation for modern people.

An automobile is generally composed of four basic parts: engine, chassis, body and electrical equipment. The engine is the power device of the car, just like our heart; Chassis is equivalent to human skeleton, which plays the role of supporting and installing all parts of the car; The car body is like our various costumes, not only used to dress up the main body of the car, but also to distinguish the brand and model of the car through various signs; Electrical equipment consists of power supply and electrical equipment. It is like a nerve in the brain, directing the movement of the "heart".

Do you know that?/You know what? Do you know that?/You know what? The first steam car was actually made in Beijing, China. 1672, ferdinand verbiest, a Belgian missionary, made a steam-powered mechanical device in Beijing, becoming the first four-wheeled steam car. At that time, Watt was not born, which was 1 15 years earlier than the composite steam engine he made, 123 years earlier than Simmington's application of steam engines to ships, 150 years earlier than Stephenson's application of steam engines to trains, and 200 years earlier than Beable's application of steam engines to automobiles.

There are many kinds of cars, usually classified according to their uses, which can be divided into general transport vehicles and special vehicles; According to the classification of power devices, it can be divided into steam engine cars, internal combustion engine cars, electric cars, solar cars and so on.

Modern cars bring convenience to human beings, but also bring pollution. For more than 100 years, automobile operation has been dependent on gasoline engines. In the past ten years, battery technology has been developed, and electric vehicles have gradually approached us. Electric vehicles can be divided into three categories: hybrid vehicles, plug-in hybrid vehicles and all-electric vehicles. All of them are driven by a certain amount of electricity to reduce the amount of gasoline, or even use no gasoline at all. Compared with traditional cars, electric cars have less impact on the environment, are safe, convenient and energy-saving, and are the development trend of cars in the future.

With the development of automobile industry, human beings are making continuous progress, and I believe there will be more and better miracles!

Elementary school explanatory text 15 Dear friends, hello everyone! My name is a laptop. Don't you think my name looks like an old desktop computer? By the way, desktop computers do have something to do with me, but what? He is my grandfather, so I am much more advanced than him! For example, if you want to use my grandfather to surf the Internet, you must use more than one network cable, which is very complicated and troublesome. But I'm completely different. All you need is a small network card, and you can surf the Internet everywhere. I am only a little higher than my grandfather. Now you should be able to get to know me roughly!

That's right. Do you know why I call it a laptop? As the name implies, it is because I am very small and delicate, as thin as a silkworm wing; Not only that, I'm also easy to carry. As long as I put it in my computer bag, I can travel all over the world, and it is effortless to carry it, so I have become the favorite of business travelers and white-collar workers.

Now it's time to talk about my components! Let me introduce my main component-the display screen! My display screen is very thin, only about two or three centimeters thick. I am much more advanced than the big and bulky display screen of the desktop computer. What else! My screen uses the most advanced material on the computer screen-LCD screen, which not only protects my eyesight, but also saves electricity. But most desktop computers still use the oldest plasma screen.

After the keyboard, let's talk about my "arm"-mouse. If I don't have a mouse, it is as convenient to use as a person without arms, so the flexibility of the mouse is very important. And my mouse moving method is the most advanced at present.

Infrared sensing technology. He moves by infrared rays, and it will never happen that the wheel mouse used in desktop computers is so easy to break down, or that the wheel inside will fall out if you can't move it, or that the circuit inside often goes wrong, so I am not so useless. I don't have these problems. Anyway, I'm fine!

Busy talking about my components.

I forgot to introduce it to everyone. Although I am small, my level is no worse than that of a desktop computer. I am proficient in typing, surfing the Internet and playing games. I know not only the most basic functions, but also various new functions such as on-screen keyboard, invisible audio and video, mouse and so on.

How about it! This is me, a very small and exquisite computer, which can take me home and become your right-hand man for only 9450 yuan. It's now or never, so act quickly!