Traditional Culture Encyclopedia - Photography and portraiture - Please introduce the school’s explanatory text, no more than 400 words, including 5 explanation methods, and marked

Please introduce the school’s explanatory text, no more than 400 words, including 5 explanation methods, and marked

Please introduce the school's explanatory text. It should not exceed 400 words and contain 5 explanation methods.

I feel a little nostalgic that the semester is over so soon. I entered middle school in September last year. On the first day of school, I met my classmates who were going to be with me day and night for three years. Through military training, I developed a lot of feelings for my classmates. I'm delighted and honored. But I also understand that middle school is a place full of competition and challenges, and I cannot have any idea of ??relaxing myself. So in order to leave a good impression on the new teachers and classmates, I gave full play to my strengths and soon became the monitor. After becoming the squad leader, I became more strict with myself and used the word "squad monitor" to remind myself all the time. Sure enough, through hard work, I got the first place in the class in the math and unit test for the first time in school, but I am not proud. I know that there is still a long way to go for me in the future. After the National Day, there was another Chinese language test, and this time I ranked second in the class. At that time, I was really a little scared. When I thought that I was second in class in Bangui, I might be ranked 20 in school, and my dream of Jinzhou Middle School would be further and further away from me. So I studied harder. Since then, the various tests have basically maintained the first and second positions. During the mid-term exam, even though I worked very hard, my grades were still not ideal. Although I was first in the class, I was ranked 24th in school. After the exam, the teacher talked to me. She said that I must be among the top ten in the school in the final exam because I was ranked third in the school in the entrance exam. So with the teacher's expectations, I continued to work hard and wrote my goals on my tablecloth. Not long after that, I won the first prize in the school's math competition. I have always believed that "if you work hard, you will succeed!"

Now the final exam is over and the results have not been sent out, but the teacher said that I did very well in the exam, not only was I ranked first in the class, You may still have good grades in school. I accomplished my goal!

In this semester, I got three certificates and two social practice report award forms. I gained a lot, but there are also many places where I need to strengthen my physical exercise. Believe me, through my efforts, I will succeed. Next semester, I will definitely greet it with a better spirit. A 60-word explanatory essay introducing Apple (two explanation methods)

I have given you an explanatory essay. The number of words may be too much. Please delete it. Drop some.

Apple Apple is a fruit that is rich in nutrients, has many uses and is beautiful in appearance.

Let me introduce you to Apple. The apple looks beautiful, like a big red balloon. The shape of the apple is as big as a small fist, but it tastes very good. It tastes crunchy and you will feel a sweet smell spreading. If you touch a smooth apple, it will feel as smooth as an egg. If you look closely at the skin of an apple, you will feel that the dots and yellow strips together look like an oil painting.

Apples not only look beautiful, taste sweet, but also have many functions. Children eating apples regularly can promote brain development and enhance memory. This is because apples are not only rich in nutrients needed by the brain, but also contain fiber that is beneficial to children's growth and development and zinc that can enhance memory.

Apples also contain a magical "apple powder", which is very useful. Apple powder has seven functions: first, it is an antioxidant, which can keep food fresh; second, it eliminates odor and can remove fishy bad breath; third, it prevents tooth decay; fourth, it can inhibit the rise of blood pressure; fifth, it can inhibit the generation of reactive oxygen species; sixth, it can inhibit the occurrence of reactive oxygen species; It inhibits melanin; seventh, it inhibits allergies.

Apple has many other names! For example, "eye-brightening fruit". Why is it called "eye-brightening fruit"? Because it contains vitamin A and the trace element selenium, which play a key role in vision. In addition to "improvement fruit", it also has many other names such as "memory fruit".

Next, let me tell you some news about Apple. Americans have designated an Apple Day on one day. Just don't eat anything for a day and just eat apples. Because apples can disperse fat and make people lose weight.

Apples are very nutritious. Apples contain protein, fat, carbohydrates, vitamin C, vitamin B2, carotene, calcium, phosphorus, acid, citric acid, and other organic substances, fiber and pectic acid gum.

Apple is a very good fruit for the body. Everyone must eat more apples! An explanatory essay introducing the Mausoleum of Emperor Shun (150 words) (two explanation methods)

I have given you an explanatory essay. The number of words may be too many. Please delete some.

Apple Apple is a fruit that is rich in nutrients, has many uses and is beautiful in appearance.

Apples not only look beautiful, taste sweet, but also have many functions. Children eating apples regularly can promote brain development and enhance memory.

This is because apples are not only rich in nutrients needed by the brain, but also contain fiber that is beneficial to children's growth and development and zinc that can enhance memory.

Among all the shrimps, my favorite is the flavored shrimp. It is so delicious that people want to eat it. I remember one time at someone else’s house. Eat flavored shrimp.

Today I went to an uncle’s house for dinner. I was particularly happy today because we were about to eat something delicious.

Ding dong! Ding dong! I was very happy when it came. Auntie put the steaming hot shrimps on the table and I started to eat. I ate one and it tasted great and not very spicy, but it became spicy after eating too much. I couldn't help it. I ate several big ones, they were so delicious! It was extremely delicious. I was intoxicated by the taste. I started eating again. I ate one after another. It was so delicious. After I finished eating, it would be delivered again after a while.

We played for a while, and then two more ding-dongs came! Ding dong! It was delivered. I ran over happily and put another plate of hot shrimp on the table. I sat on the sofa and started to eat it. I was fascinated by the taste of this shrimp again. It was so delicious that I started eating it again. I couldn't eat it anymore, so I stopped eating it, but I still wanted to eat it. An explanatory text introducing the small alarm clock (with explanation method)

I have a small alarm clock, which is only as big as the palm of my hand and about 12 centimeters high. The hour hand, minute hand and second hand inside are constantly chasing each other day and night.

The small alarm clock is extremely beautiful, with a transparent glass cover, a bright red shell, two half-moon-shaped "

little ears" and a small alarm that keeps ringing. , there is a cartoon character wearing a skirt on the red bottom layer. It is a character that many girls like. Guess who she is? It is the beautiful sheep! Seeing how cute it was, I named it "Little Cutie"!

There are three brothers living in the belly of the "little cutie". They are all wearing black clothes. The eldest brother is called Hour Hand, he is the shortest of the three brothers and the slowest one; the second brother is called Minute Hand, he is taller than the eldest brother and runs much faster; the younger brother is called Miao Zhen. It looks like the smallest one, but it is tall, thin, and the slenderest. When it comes to running, it leads the pack and can run a lap in one minute. As long as there is "enough food" and "well-fed", the three brothers will always run non-stop and never feel tired. At 12 o'clock, the three brothers were reunited. However, the time they spent together was only one second, it was too short! But for the collective benefit, they had no choice but to meet again 12 hours later. Explanatory text about eating using four explanation methods 600

There are countless snacks that are delicious. Whether it is the famous Dengzhan cake, the fragrant Yongjia wheat cake, the soft and delicious dwarf sponge cake, or the elastic fish balls, they are all rich and delicious; whether it is the light seaweed soup, the plump hemp hearts The glutinous rice balls and the fiery red duck tongue are both amazing and unforgettable.

Among them, Changren wonton is famous and loved by everyone who has eaten it. The white and red wontons, the golden egg shreds, the pink shrimps, and the black seaweed are all rich in color. The fillings in the wontons are also very delicious, full of color, flavor and flavor. Just smelling them makes people drool. If you eat it, you will definitely appreciate its deliciousness. This is made by ingenious chefs. Their skills are exquisite, and the wontons they make are all the same size, as if they were measured with precision instruments. They make snacks last forever.

If you have good works, you can also click "I want to submit" below to send your work to us. By then, more readers will appreciate your masterpiece! A 400-word introduction to writing expository essays about animals. There are four ways to explain that cats and dogs are not allowed

The Asian elephant is 2.0 to 3.7 meters tall at the shoulder and weighs 2 to 7.5 tons. The African elephant is 3.0 to 4.0 meters tall at the shoulder and weighs 3 to 8 tons. The African forest elephant The average shoulder height does not exceed 2.6 meters, and the weight is 2-4 tons. The elephant has a big head, ears as big as fans, and limbs as thick as cylinders to support the huge body. The knee joints cannot bend or extend freely. The length of the trunk is almost equal to the length of the body. It is cylindrical and can be stretched and bent freely. The elephant trunk is entirely composed of muscles. The nostrils open at the end, and there are finger-like protrusions on the tip of the nose, which can pick up objects. The elephant trunk is very flexible and can pick up objects weighing up to 1 ton, and can also pick up food as small as peanuts. One of the genus Elephantus in Central and South Asia or the Elephantus in Africa. It has thick skin, hairless, and a long flexible nose that can be curled. The upper two incisors develop into long and curved tusks. African elephants have huge fan-shaped ears. The upper jaw has a pair of well-developed incisors, which grow throughout life. The incisors of African elephants can be up to 3.3 meters long, and the tusks of female Asian elephants are not exposed. There are 6 cheek teeth on each side of the upper and lower jaws, which grow in sequence from front to back, with high tooth crowns. The structure is complex. Each foot has 5 toes, but the 1st and 5th toes are underdeveloped. The coat is sparse and the body color is light grayish brown. The male elephant's testicles are hidden in the abdominal cavity; the female elephant has two vaginas behind its front legs. The gestation period is more than 600 days (22 months), and the pregnancy is usually single.

African elephants are larger, have big ears, and have two finger-like protrusions at the end of their nose; Asian elephants are smaller, lighter in weight, have small ears, and have one finger-like protrusion at the end of their nose. How to use the explanatory method to write an explanatory essay about school

1. Grasp the characteristics of things and grasp the center of explanation

Everything has its own characteristics, which are different from other things sign. When writing expository essays, only by grasping the characteristics of things can we accurately and clearly introduce the things being explained to readers, so that people can have a precise understanding of the things. Writing by grasping the characteristics of things is to grasp the center of explanation. Of course, things often have many characteristics, and it is impossible to introduce them all in an explanatory article. We can only talk about one or two characteristics at a time as needed. For example: ducks and chickens are both poultry. They can both walk, have two wings, and can be used as meat. But if you want to write an explanatory essay about ducks, you must grasp the characteristics that distinguish ducks from chickens and other poultry. Compared with chickens, it likes to live on the water, and its tail can secrete oil; it has a pair of palm-shaped webs for paddling; its beak is long and flat, etc. By grasping these characteristics of the duck and explaining them, people can have a clear understanding of the duck's living habits and appearance. Different things certainly have different characteristics, and similar things often have differences. These differences are their characteristics. When writing expository essays, you should firmly grasp these characteristics. For example, the article "Chinese Stone Arch Bridge" writes about Zhaozhou Bridge and Marco Polo Bridge. Both bridges are stone arch bridges. They have many similarities, but they also have their own characteristics. Mr. Mao Yisheng grasped their respective characteristics and made comparative explanations, allowing readers to understand the different shapes, structures and artistic styles of the two bridges.

Grasping the characteristics of things and grasping the center of explanation is a basic requirement for writing a good expository essay. To achieve this, the key is to conduct in-depth and detailed observation, analysis, comparison, and research on things, so as to be truly familiar with the things being explained, and to master the characteristics and laws of the things themselves. Only in this way can things be explained well.

2. Choose the angle of explanation according to the specific situation

Writing articles is targeted, such as what kind of people you write for; writing articles is also purposeful , such as what kind of problem is to be solved through the article. For example, if you write an explanatory article about groundnuts, if the target audience is farmers, and the purpose is to teach farmers the techniques of cultivating groundnuts, then you must explain the growth patterns of groundnuts from the perspective of how to cultivate them to achieve high yields, focusing on how to cultivate them. Seed selection, land selection, sowing, fertilizing, management, etc. If the target is a chef or a worker in a food processing factory, and the purpose is to introduce how to process and eat groundnuts, then the focus should be on the nutritional value of peanuts and how to process and add ingredients to make peanuts more delicious, etc. When we middle school students write expository essays, we can first imagine who we are writing for, so that we can explain the specific situation and avoid writing the article in a disorganized way with unclear purpose.

3. Pay attention to the structural arrangement and be coherent

The organization of the article is the reflection of objective things, the characteristics and laws of the matter itself in the structure of the article. To explain things and explain things in expository texts, the order of explanation must be arranged according to these relationships, so that the levels are clear and the priorities are clear. For example, in the "Rent Collection Courtyard" of the "Landlord's Manor Exhibition Hall" in Dayi County, Sichuan, there are several clay sculptures... These pictures are relatively independent and in a juxtaposed relationship. There are four gates for landlords to collect rent, which are Gugu Pass, Fenggu Pass, Guodou Pass and Account Settlement Pass. Every rent-paying farmer must pass four levels. From the first level to the fourth level, there is a sequential relationship. These individual examples jointly expose the evil of landlords' cruel exploitation and oppression of farmers. This is the overall overview of the "Rent Collection Courtyard". This overall overview and each individual instance become a total score relationship. The article "Explanation of the Rent Collection Courtyard" grasps these relationships. It adopts the writing method of summarizing first and then dividing. It begins with a brief introduction to the crimes of landlord Liu Wencai’s cruel exploitation and oppression of peasants, and then introduces them separately according to the order of clay sculpture scenes, highlighting the basic idea that where oppression and exploitation must lead to revolution and resistance.

For things in a parallel relationship, you should also pay attention to the order of orientation, from top to bottom, or from front to back, from left to right, from outside to inside, from near to far, etc. Only according to these Only by writing in order can you be clear and organized. For example, the full text of "The Palace Museum" is an introduction to an ancient building complex. The author introduced this majestic building complex in a clear and logical manner by first summarizing and then dividing. When writing about parts of a building, the hierarchy is also very clear. For example, when writing a section about the Hall of Supreme Harmony, start from the outside and then inside. When introducing the outside of the hall, follow the order from top to bottom, from the sky to the top of the palace to the platform base. When introducing its interior, it is explained in order from the middle to the sides, from front to back, from top to bottom, and from far to near, giving people a clear impression.

Explanatory texts introducing the production process should be explained in the chronological order of production; explanatory texts introducing plant growth should consider the order of growth and explain them in sequence. Of course, no matter what type of explanatory text, the priority should be clear.

4. Pay attention to the art of language and improve the effect of explanation

The language of expository writing is characterized by simplicity and plainness, and often uses technical terms, which can easily give people a boring feeling. In order to improve the effect of explanation, some effort must be made in language. The language of expository writing does not lie in piling up gorgeous words, but in using words that are accurate, precise, popular, and interesting.

How can this be achieved?

First of all, after carefully observing things and thoroughly understanding the characteristics of things, choose words that can best reflect the objective things to explain. Pay special attention to the appropriate use of words that limit the scope and indicate conditional relationships. . For example, "Chinese Stone Arch Bridge" mentioned the Marco Polo Bridge: "The bridge is about eight meters wide, and the road surface is flat, almost parallel to the river." The word "about" means that the bridge deck is not exactly eight meters, and only the approximation is taken here; the word "almost" means that the flatness of the road surface is basically parallel to the river surface, but not completely parallel. In "Knowing the Weather by Looking at the Clouds", "Thin clouds in the sky are often a symbol of sunny weather; while those low and thick clouds are often a harbinger of rain, wind and snow." The words describing the morphological characteristics of the clouds and the words indicating the time are used together, which is very accurate and precise.

Secondly, we must pay attention to mastering and using necessary technical terms and avoid using "layman's words". For example, "aerospace" and "aviation" are two different concepts. When an airplane flies within the atmosphere, it is called Aviation; satellites and spacecraft flying outside the atmosphere are called aerospace. They use different aircraft to complete flight missions in different spaces. Differences such as these must be noted when writing an article.

Thirdly, make appropriate use of metaphors, personifications, objects and other rhetorical techniques. For example, the article "Chinese Stone Arch Bridge" begins: The bridge opening of the stone arch bridge is arched, like a rainbow in the sky. Using "rainbow" to describe the stone arch bridge is very vivid, allowing readers to clearly understand the appearance characteristics of the stone arch bridge. For another example, in "The Language of Nature", the author uses metaphors and personification to explain that "the fragrance of flowers, the singing of birds, the growth of grass and the flight of warblers" are all the language of nature. Working people understand the laws of seasons and arrange farming based on these phenomena. Due to the use of metaphors, personification and other rhetorical techniques, this passage is not only easy to understand, but also lively and interesting. The explanatory text (600) that introduces the chalk box requires the use of explanatory methods

When I mention chalk, I think of a riddle I guessed when I was a child. The riddle is "The eldest brother drinks water first when he speaks, the second brother takes off his hat first when he speaks, and the third brother speaks first." "Snowflakes are floating" - three kinds of pens. I think everyone can guess: brushes, pens and chalk. However, if chalk is ranked third, I feel aggrieved for it. Because in every aspect, chalk is not inferior to brushes and pens. Although chalk is "unattractive", no more than three inches long and no thicker than a thumb, it has many advantages! Chalk is cheap and good. A box of chalk only costs a few cents. There are dozens of them, and the average price is a few cents each. As for brushes, they cost several yuan, and fountain pens are even more expensive. Chalk is rich in colors: red like fire, white like snow, pink like clouds, blue like the sea, etc. Unlike the writing brush, you need to prepare a box of paints to describe the colorful colors, otherwise, it will be "as black as the brush in the world". The same is true for the pen, the writing color is very monotonous. Chalk is easy to use: if you make a mistake, you can erase it, but this is not the case with brushes and pens. Once you make a mistake, it will be "a mistake that will cause eternal hatred" and cannot be corrected unless you ask the "fading spirit" to help. Oh, no, the chalk broke. It doesn't matter, you can still use it if it breaks. Unlike writing brushes, fountain pens cannot withstand abuse. If you are not careful, you will be reimbursed! However, chalk also has shortcomings. When used, there is too much dust and it is easy to pollute the environment. Another point is that the handwriting written with chalk is not easy to retain and becomes blurred over time. A small piece of chalk has introduced infinite knowledge to us. In order to spread knowledge to people, the chalk family has fought one after another and broken into pieces. How noble their spirit is! From this point of view, shouldn’t Chalk be the leader? How to explain the utensils

Electric fan (electric fan)

diàn shàn

1.an electric fan

Electric fan is also known as Electric fans are used to dissipate heat. It is good to use them to cool down in summer. They can also be used to dissipate indoor heat.

[Edit this paragraph]The invention of the electric fan

It is difficult to find relevant information about who invented the electric fan. It is said that in 1882, Huey Skatz Hoila, the chief technician of the Crokazikas Engine Factory in New York, USA, invented the first commercial electric fan. The next year, the factory began mass production. The electric fan at that time was a desktop electric fan with only two blades.

In 1908, the Ecker Engine and Electric Company in the United States successfully developed the world's earliest gear-driven electric fan that oscillates left and right. This kind of electric fan prevents unnecessary 360-degree rotation to supply air, and has become the mainstream of sales in the future.

[Edit this paragraph] Working principle of electric fan

The main component of electric fan is: AC motor. Its working principle is: the energized coil is forced to rotate in the magnetic field. The form of energy conversion is: electrical energy is mainly converted into mechanical energy. At the same time, because the coil has resistance, it is inevitable that a part of the electrical energy must be converted into internal energy.

When the electric fan is working (assuming there is no heat transfer between the room and the outside world), the indoor temperature not only does not decrease, but will instead increase. Let us analyze the reasons for the temperature rise together: When the electric fan is working, because there is current passing through the coil of the electric fan and the wire has resistance, heat will inevitably be generated and exothermic outward, so the temperature will rise.

But why do people feel cool? Because there is a lot of sweat on the human body surface, when the electric fan starts working, the air in the room will flow, so it can promote the rapid evaporation of sweat. Combined with "evaporation needs to absorb a lot of heat", people will feel cool.

[Edit this paragraph] Structure of electric fan

Rotor: composed of magnets, fan blades and shafts; stator: composed of silicon steel sheets, bobbins and bearings; control circuit: composed of IC The N.S. pole of the induction magnet controls the conduction of its coil through a circuit to generate internal excitation to rotate the rotor.

[Edit this paragraph] Types of electric fans

According to the structural form of the motor: there are single-phase capacitive type, single-phase shaded pole type, three-phase induction type, DC and AC. DC dual-purpose series commutator electric fans can be divided into household electric fans and industrial exhaust fans according to their uses.

Household electric fans

There are ceiling fans, table fans, floor fans, wall fans, ceiling fans, etc.; there are table fans that shake their heads and those that do not. Page turning fans; floor fans include those that shake their heads and turn pages. There is also a small breeze fan, which is specially hung in the mosquito net. When you sleep at night in summer, the breeze will blow as soon as you turn it on, so you can have a peaceful sleep without getting sick.

Industrial exhaust fans

are mainly used for forced air convection. After using an electric fan for a long time, it is easy for a lot of dust to accumulate on the underside of the fan blades. This is caused by the friction between the fan blades and the air when the electric fan is working. The fan blades are charged with static electricity. The charged objects can attract light and small objects, thereby absorbing the fine dust floating in the room.

[Edit this paragraph] Use and maintenance of electric fans

1. Read the instruction manual carefully before use and fully understand the structure, performance, installation, use and maintenance methods of electric fans. and precautions.

2. Desktop and floor-standing electric fans must use three-core plugs and sockets with safety grounding wires; ceiling fans should be installed at a higher position on the ceiling, and no grounding wire is required.

3. The blades of electric fans are important components. They must be protected to prevent deformation whether during installation, disassembly, scrubbing or use.

4. When operating various function switches, buttons, and knobs, do not move too hard or too fast, nor can you press two buttons at the same time.

5. The ceiling fan speed knob should be rotated slowly and sequentially, and should not be rotated in the gear position, otherwise it will easily cause the ceiling fan to heat up and burn out.

6. Oil stains or dust accumulation on electric fans should be removed in time. Do not use gasoline or strong alkali to wipe, so as not to damage the function of the surface painted parts.

7. If the electric fan is hot to your hands, has an unusual burnt smell, has trouble shaking its head, or slows down its speed during use, do not continue to use it and cut off the power supply in time for maintenance.

8. Before storing the fan, the surface oil and dust should be thoroughly removed, wiped clean with a dry soft cloth, and then wrapped in kraft paper or a clean cloth. The storage location should be dry and ventilated to avoid squeezing.