1. A 400-word explanatory essay on electrical appliances

The amazing household appliance—computer. The computer is the king of all household appliances.

Computers are tools needed for work. Computers can bring us entertainment; computers can search for information online; computers can help us study; computers can chat online... In the past, computers could not access the Internet and could only do simple calculations.

But things are different now. Not only can you surf the Internet, you can also send emails! E-mail is more convenient, faster, and saves a lot of money than writing a letter, and it's also very safe. In today's big world, there are more than one manufacturer of computers, and there are many brands of computers, such as LG and Haier, there are too many to count.

This is nothing! If you look at the size of today's computers, they are simply... Recall that the world's first computer was as big as a football field. Just look at it now. Computers are as thin as a book.

Comparing the two, they are really very different. Having said so much, I still haven’t understood the appearance and usage of a computer! The appearance colors of computers are generally silver, gray and black.

A computer is composed of a host, keyboard, display, mouse, audio, etc. If you want to open any file on the display, you can hold the mouse in your right hand and double-click it twice to open the file you want; if you want to input something or type to enter the computer, you need to use the keyboard. .

There are 26 English letters and some numbers and functions on the keyboard. Once you want to type, you just press the 26 English letters; if you need numbers, just press the number you want.

As long as you study seriously, no matter how difficult it is, you can overcome it! How amazing computers are! It provides people with convenience and adds endless fun to people's lives. 2. About writing descriptions of household appliances, essays

Elementary school essays introducing a kind of household appliances

Introducing a kind of household appliances microwave ovens

My family has a Galanz Although the microwave oven is not too big, it has many functions. It can steam rice, grill meat, and the most common thing is to heat dishes in a short time without losing nutrients.

This microwave oven is rectangular, with a height of about 20 cm and a width of about 40 cm. It has a wide "glass window" through which you can see what's going on inside.

There are two knobs on the right side of the microwave oven. The top one is a timer, which can be adjusted up to 30 minutes. The other knob is used to adjust the firepower. It can be adjusted to large, medium or small. Come bake something.

If the leftovers from the last meal at home need to be heated, just put the dishes in and set the timer for 3 to 5 minutes. Just listen to the "buzzing" sound and it will start working. Wait until the time When it arrives, the "bell" sounds, and the small door of the microwave oven opens automatically. At this time, we can take out the dishes, which are hot.

Microwave ovens bring convenience to our lives. They are environmentally friendly and save time. We all like it very much! 3. Write an explanatory article, a 500-word essay introducing electrical appliances

A radio converts high-frequency signals received from an antenna into audio signals through detection (demodulation), and sends them to headphones or speakers to become sound waves. .bcl3000 Due to the advancement of science and technology, there are many radio waves of different frequencies in the sky. If all these radio waves are received, the audio signal will be like being in a busy city, with many sounds mixed together, and nothing can be heard clearly. In order to try to select the required program, there is a selective circuit behind the receiving antenna. Its function is to select the required signal (station) and "filter out" the unwanted signal to avoid interference. This It is the "station selection" button we use when listening to the radio. The output of the selective circuit is to select the high-frequency AM signal of a certain station. It is not possible to use it to directly push the earphones (electroacoustic devices). It must also be To restore the original audio signal, this restoration circuit is called demodulation. By sending the demodulated audio signal to the earphones, you can receive the broadcast. On National Day last year, my family bought a Japanese Toshiba two-door refrigerator.

The rectangular figure is almost as tall as me. The emerald green coat gives people a simple, elegant and quiet feeling.

Open its two doors, the walls of the box are milky white, the small door is used to freeze various drinks, and the large door can be used to refrigerate fresh meat, vegetables and fruits.

In summer, my mother no longer has to worry about the food turning rancid; if guests come, my father always likes to serve them his own ice cream or iced watermelon. How are refrigerators made? Dad said that when I enter middle school and study physics, I will understand.

According to my father: "The Bat brand electric fan is a famous brand product in Nanjing. It sells well at home and abroad. The ones now produced are equipped with indicator lights and timers. They have also given it a nice alias, called "Megale". "My Bat-brand electric fan has no timer or indicator light, but its milky white body, grass-green blades, shiny guard, and piano-key switch are very beautiful.

Its trademark is also very unique. In the center of the shield, a silver-white bat is printed on a dark blue disk, as if flying in the sky on a summer night. As long as you press the quick switch, the three duckweed-shaped wind blades will turn into jasper-like discs, and the "whirring" sound of the wind will immediately make you feel cool all over.

TV, TV, whenever night falls, you are active in front of the audience in thousands of households. From that small fluorescent screen, through images and announcer's words, you truly report to people the major events happening at home and abroad, introduce the latest achievements on all fronts of the motherland, and show you the wonderful scenery, customs and customs of the motherland. .

We have you, it is true that "a scholar can know the affairs of the world without going out". TV sets, TV sets, you broadcast operas, songs and dances, feature films, series, sports competitions, knowledge lectures, etc., which are loved by men, women and children.

Now you have become a school classroom, you have brought joy to people, and you have increased our knowledge and strength. My father bought me a computer. It was only as big as a small diary. When weighed in the palm of my hand, it was only as heavy as a piece of sesame seed cake.

This kind of electronic computer is a "microcomputer", also called a "pocket computer". Although the microcomputer is small, its capabilities are not small.

Such a small electronic computer can perform tens of thousands of calculations per second. On my tenth birthday, my father bought me a Panda desktop cassette player. Its case was made of wood, dark olive color, and its smooth surface could reflect the silhouette of people.

The front of the chassis is a silver-white plastic plate, which looks like it is made of metal. There are two speakers on the left and right sides of the board, and there is a square black shield on the outside. There is a piece of plexiglass in the middle of the two speakers. It is the cassette door for holding audio tapes; the top and bottom of the board are also equipped with various switches, knobs, instruments, jacks, indicator lights, etc. for radio and recording. These are all arranged in an orderly and beautiful manner. Every time I use it to learn English, play music, and listen to radio and bookstore programs, it has become my good friend.

I have a high-quality tube radio at home, equipped with a speaker box equipped with a 12-inch woofer. When I listen to the music, not to mention how powerful and beautiful it is, the floorboards tremble slightly. I have a Goldfish brand single-cylinder washing machine at home. It has a sky-blue body supported by four small wheels and is only half a person tall.

Although it is not very conspicuous, it is a good helper for mother. Every time she washes clothes, her mother only needs to fill it with half a tank of water, mix in some washing powder, put the wet clothes in, connect the power, and turn the timer switch, and it will sound "rumbling, rumbling". .

At this time, my mother went to do other things. I saw the clothes in the tank, together with the clothes water, rotating left and right for a while, and the foam stirred up and down. At the designated time, it automatically stopped.

At this time, my mother used the same method, changed the water for it, let it pass twice, and the clothes were washed. It saves mom's time and energy and is a good helper for mom.

4. Write an explanatory essay about electrical appliances

My water dispenser is one meter high and it is a member of my family. This water dispenser is divided into two parts, the upper part is for receiving water, and the lower part is It is a disinfection cabinet. The body is milky white and rectangular. It carries an oval water purifier on its back. Xiaohe Composition Network

This water dispenser has great functions, the most important thing is The purpose of the disinfection cabinet is to help us boil water. The disinfection cabinet can sterilize the water containers. The water purifier filters the water into clean water so that people can use it with confidence. For example, if parents are too busy and have no time to boil water, then the water dispenser can It can boil water for you. You only need to press the heating button on the water dispenser, and then you can wait. In a few minutes, the water will boil and you can drink it with confidence.

If the water purifier contains The water is gone, this is how to do it; first remove the upper cover of the water purifier, put tap water inside, and it will discharge clean water through the filter. Then press the red button on the back of the fuselage, and the water dispenser will start It works. At this time, there is a small dot on the upper part of the fuselage. Its color changes from red to yellow, which proves that the water has boiled. Then take the cup and pull the switch down with your hand, and the water will come out. At this time, you can drink water.

The water dispenser in my home helps us, so we all love it 5. Explanatory essay on electrical appliances in 400 words with explanation method

My home There is one brand that is white in color, just like the white snow in winter, so pure.

It is about 1.6 meters high and 1 meter wide. Above it is a refrigerator compartment where vegetables can be placed.

Below is the freezer, where you can store ice cream and make ice cream. There is a button on the refrigerator compartment called the defrost button. Whenever there is a lot of frost in the refrigerator compartment, it will activate the automatic defrost function.

Since we got this refrigerator, it has been much easier for us to do things. For example, our family has a lot of rice and vegetables left after eating.

In the past, grandma would throw them away, fearing that we would eat them up. I think it's a waste.

However, now that I have this refrigerator, leftover rice and leftovers can be placed in the refrigerator, and there is no need to worry about them spoiling tomorrow. No need to waste so much.

In the hot summer, the refrigerator compartment below can also contribute delicious ice cream to us. I remember that summer, the weather was very hot, the hot sun hung in the sky, and the cicadas on the trees kept shouting "Cicada, cicada."

I was so hot that I was sweating profusely. I said to my mother: "Mom, since we have a refrigerator, let's make ice cream!" My mother said, "Okay!" So, I asked my mother for 20 yuan and went to the store below to buy some ice cream materials. , and then started working on it when I got home. After it was done, I put the ice cream in the freezer under the refrigerator to freeze, and then I read a book. I was in the room, but my mind flew to the kitchen. I went out to see if the ice cream was good. After a while, my mother came in again and saw me, and said to me: "Chunzi, don't come out once in a while, otherwise the ice cream will never be made well."

So, after 3 hours, I made another I went to see it and it was indeed done. I ate the delicious ice cream and thought it would be great to have it. 6. Composition: Write an explanatory essay about electrical appliances. The title should be 300 words of your own choice.

Small Alarm Clock I have longed for a small alarm clock.

Not long ago, my mother came back from studying in Hangzhou and brought me a small calendar alarm clock with a three-dimensional scenery. My wish finally came true.

I happily took the small alarm clock and looked at it carefully. This clock is rectangular. On the front is a panoramic view of the West Lake "Weeping Ducks in the Waves in the Willows". Most of the picture is of the beautiful West Lake. The water is as calm as a mirror. On one side of the picture is a garden built in the Southern Song Dynasty. There is a Liulang Bridge, there are many willow trees planted by the lake.

Looking at the picture, I suddenly understood the meaning of "hearing orioles in the willow waves". You see, the breeze blows and the wicker sways in the wind. Isn't it just like a green wave? The "tick, tick" sound of the second hand, isn't it like an oriole singing gracefully on the tree? There is a plastic "small window" on the upper right side of the clock, and inside is the calendar.

The calendar is made of plastic foam and the numbers displayed are bright red. This red number changes every 24 hours, telling people that a new day has arrived.

Among the 12 numbers that represent the hour, "3" and "9" are just two equal signs. Only "12" and "6" are two correct Arabic numerals, and the remaining 8 Each number is just 8 small square dots, which are evenly embedded in the beautiful picture. There is a small golden line below "12", which is pointing to another "red window" the size of a green bean.

Through the window, you can only see a number. If you turn the hidden button on the alarm clock, align the numbers with the yellow line, and wind it up, a series of crisp tones will remind you of the hour you set.

The hour hand, minute hand and second hand that never rest are fixed by three discs from large to small. The hour hand is at the bottom, short and thick; the upper layer is the second hand, which is long and thin; the middle layer is the minute hand, neither thick nor thin, neither long nor short.

I put down the small alarm clock and shouted happily: "Oh, now I can get up on time!" My mother said: "Not only to get up on time, but more importantly, it requires you to race against time!" Yes! Ah, I have to race against time. On the road of seeking knowledge, we must lay a solid foundation step by step, and use our own hands to build our hometown more beautiful in the future. 7. A fifth-grade composition describing the explanation method of electrical appliances

My refrigerator

My family has a Haier refrigerator. Its color is white, white like in winter. Snow, so pure. It is about 1.6 meters high and 1 meter wide. Above it is a refrigerator compartment where vegetables can be placed. Below is the freezer compartment, where you can store ice cream and make ice cream. There is a button on the refrigerator compartment called the defrost button. Whenever there is a lot of frost in the refrigerator compartment, it will activate the automatic defrost function.

Since we got this refrigerator, it has been much easier for us to do things. For example, our family has a lot of rice and vegetables left after dinner. In the past, grandma would throw them away, fearing that we would get upset after eating them. I think it's a waste. However, now that I have this refrigerator, leftover rice and leftovers can be placed in the refrigerator, and there is no need to worry about them spoiling tomorrow. No need to waste so much.

In the hot summer, the refrigerator compartment below can also contribute delicious ice cream to us. I remember that summer, the weather was very hot, the hot sun hung in the sky, and the cicadas kept shouting "Cicada, cicada" on the trees. I was so hot that I was sweating, and I said to my mother: "Mom, Anyway, we have a refrigerator, let’s make ice cream!” Mom said, “Okay!” So, I asked my mother for 20 yuan, went to the store below to buy some ice cream ingredients, and then started when I got home. Got it done. After it was done, I put the ice cream in the freezer under the refrigerator to freeze, and then I read a book. I was in the room, but my mind flew to the kitchen. I went out to see if the ice cream was good. After a while, my mother came in again and saw it, and said to me: "Chunzi, don't come out once in a while, otherwise the ice cream will never be made well." So, after 3 hours, I went to see it again, and it was indeed done. .

I was eating delicious ice cream and thought how nice it would be to have a refrigerator!

The amazing household appliance—the computer

The computer is the king of all household appliances. Computers are tools needed for work. Computers can bring us entertainment; computers can search for information online; computers can help us study; computers can chat online...

In the past, computers could not access the Internet and could only do simple calculations. But things are different now. Not only can you surf the Internet, you can also send emails! E-mail is more convenient, faster, and saves a lot of money than writing a letter, and it's also very safe. In today's big world, there are more than one manufacturer of computers, and there are many brands, such as LG and Haier, there are too many to count. This is nothing! If you look at the size of today's computers, they are simply... Recall that the world's first computer was as big as a football field. Just look at it now. Computers are as thin as a book. Comparing the two, they are really very different.

Having said so much, I still haven’t understood the appearance and usage of a computer! The appearance colors of computers are generally silver, gray and black. A computer is composed of a host computer, a keyboard, a display screen, a mouse and an audio system.

If you want to open any file on the display, you can hold the mouse in your right hand and double-click it twice to open the file you want; if you want to input something or type to enter the computer, you need to use the keyboard. . There are 26 English letters and some numbers and functions on the keyboard. Once you want to type, you just press the 26 English letters; if you need numbers, just press the number you want. As long as you study seriously, no matter how difficult it is, you can overcome it!

How amazing computers are! It provides people with convenience and adds endless fun to people's lives!

Hope this solves your problem.