1. Write a 400-word essay on the development of science and technology, thank you
Science and technology is developing, and it is a majestic force driving our progress; science and technology is developing, It is a bright future blown by gusts of spring breeze; science and technology is developing, and it is the sweat of the working people that is watering the beautiful fertile soil. Ah, science and technology is developing, and the future of the motherland is moving towards a bright future!
The annual spring outing is here again, and we all got on the bus with good expectations. The scene in the car can be called a spring breeze! The scenery outside the window is also unique, and there is a warm atmosphere everywhere. Cars full of smiles fly by on the highway.
Radar College, military management. As soon as I entered the college, I heard a loud voice. Thunderous shouts came into my ears: "One. Two. Three. Four., One. Two. Three. Four." It was so neat and strong. Looking again, there are teams of teams, with hands dancing and feet stepping. Their military postures are so chic and neat, without a trace of fatigue
Their rooms are also military-like. manage. Look at that quilt, it’s piece by piece, like tofu, with edges and corners. I really don’t know what magic they used to turn the "soft" quilt into a "hard" terrace. "The most solemn flag-raising ceremony is about to begin. I saw uncles in blue military uniforms holding red flags and marching steadily towards the rostrum. When the bright five-star red flag slowly rose, everyone Everyone's eyes were focused, and everyone's face showed excitement.
What amazed us even more was the sophisticated radar. Look at the straight upright radars. In front of our eyes, the metal tubes above the radar are woven into magical "nets." "It can emit battery waves, and the speed of propagation is the speed of light C. In the 1930s, there was a major breakthrough in radio technology and the invention of radar. Today, radars that can detect long distances no matter day or night are being demonstrated. In front of us, I can't help but feel a sense of admiration in my heart. What an amazing invention. This may be the inevitable result of the development of science and technology!
Although we are tired today! A little bit, but I realize that the reason why today's society is advancing rapidly is that it is inseparable from the development of science and technology, which also adds to our strong interest in military affairs. With the development of science and technology, the shoulders of our generation are heavier!
Delete it yourself. 2. The essay about technology changing life
If you are writing an essay about technology changing life, you must focus on the impact of technology on life, so you must write about technological reform. importance, and then write about the ways in which technology changes life.
Technology changes life. This is a very big topic. To write this essay, we must focus on describing the achievements of science and technology in all aspects. , when necessary, you can refer to some scientific and technological knowledge, and then write about the impact of technology on life, so that the composition can become more holistic. When writing such a scientific and technological composition, you must deeply reflect the characteristics of technology, and introduce technology in detail when necessary. It is an important writing tip to show the changes in life through the development of science and technology.
If there is no limit to the type, it is best to write an argumentative essay. Technology is the focus, but technology cannot be described blindly. , it is necessary to write about its changes in life, otherwise it will go off topic. Therefore, the core point of view of technology changing life must be written at the beginning of this essay.
3. Composition: More than 400 words on the changes technology brings to people around us
Technology changes life 1. When it comes to cars, you must be familiar with them, you will think of JPS, you will think of speed, but more advanced cars have already appeared. However, this kind of car in the imagination can stand up when driving at slow speed or when stationary, which solves the shortcoming of a large floor space and is truly intelligent. It can detect stationary pedestrians or vehicles in front of it in an extremely fast time and quickly vibrate the steering wheel or The handle allows the driver to react quickly and avoids many accidents. 2. There has also been great progress in electronic products. The electronic component used in the first computer, a tube, is about the size of a thumb. The entire computer is composed of more than 20,000 tubes. A computer is as tall as a building. Nowadays, most computers can be put in pockets, which makes people’s lives more convenient. 3. As the saying goes, you can predict future trends by looking at current toys. Some foreign country A remote control car was launched at the exhibition. It can not only be used on vertical walls, but also be sucked on the ceiling like a gecko. It is expected that such a car will be used in our lives in the future
Reference Information: Baidu.
4. Write a 400-word essay on the topic of technology around us, thank you
The first one; "Science" is such a wonderful thing that many scientists are willing to devote their entire lives to it. .Many people think that science is far away from us, but in fact, science is around you and me. When the holidays came, I had more time for myself, so I began to become interested in scientific experiments. I made eggs "shrunk" "Osteology" experiment. I first boiled the eggs and peeled them, then poured half a bottle of boiling water into the empty glass bottle, and then placed the egg on the mouth of the bottle. I opened my eyes wide and observed carefully, and found that the egg kept shrinking, and kept shrinking. It fell slowly, and finally fell into the bottle. Although the book said that the egg would definitely fall into the bottle, I was still stunned by the sight in front of me, and a sense of pride arose spontaneously! "The experiment was successful!" I couldn't help shouting. Why can the egg shrink and fall into the bottle? I opened the book with doubts. It turns out that as the water temperature drops, the space occupied by the water in the bottle becomes smaller, so the air in the bottle immediately occupies a larger space. In this way, the air around the bottle will squeeze the egg, Forcing the egg to slide into the bottle. Oh, it is not the "bone reduction technique" that makes the egg fall into the bottle, but the atmospheric pressure! Then, I did the "water pressure bubble" experiment. I first poured some washing powder into a bowl, stirred it, poured water into another bowl, and dipped one end of a toilet paper roll into a little washing powder water. Then put the other end into the water, and at this time, a colorful bubble appeared. I repeated this experiment and found it really interesting. You don’t need to blow with your mouth. You just need to dip one end of the toilet paper roll into the washing powder water, and then put the other end into the water. Put it into clear water, and colorful water bubbles will appear immediately. I excitedly called my parents to watch. My parents also felt amazing and asked me what scientific reason this experiment contained. I still found the answer from the book: When When we slowly immerse the scroll in clean water, the atmospheric pressure pushes the water in the bowl into the scroll, and the air in the shaft cylinder is squeezed and gradually rises, thereby pushing the washing powder film to bulge. Because the washing powder film has surface tension, the bulging It won’t break after you get it up. That’s it! I gained another piece of scientific knowledge. My father wanted to move two large pieces of glass and wanted me to work with him, but he was worried about breaking the glass. What should I do? Dad put a few drops of water on one piece of glass, and then we carefully covered the other piece of glass. As a result, the two pieces of glass were firmly stuck together. We easily moved the two large pieces of glass to a safe place. I Somewhat confused: Why can a few drops of water stick two pieces of glass tightly together? The book "Science" helped me understand the mystery: the reason why glass sticks together tightly is because of the adhesion between glass molecules and water molecules. Adhesion is a strong attraction that exists between different substances and molecules. , under the action of this force, the two pieces of glass are firmly stuck together and difficult to separate. It seems that science is in our lives. As long as we observe carefully, think carefully, combine books, and connect with practice, we can discover scientific principles. , thus, let science serve our lives and improve our quality of life. Second; everyone is familiar with the word science and technology. Simply put, science and technology is science and technology. From a broad perspective, it refers to nature The sum of science and technology and social science and technology. Since the reform and opening up, science and technology have sprung up as time goes by and are developing rapidly in the motherland. Looking around in life, technology is everywhere, and technology is around me! When we walk on the road at night, there are electric lights to illuminate us; when we call a friend, we can easily take out our mobile phone; when we get home, we turn on the TV to watch the news and turn on the computer to chat with our friends; my mother has steamed the rice in the rice cooker; Turn on the electric heater; the family sits together and enjoys the delicious food prepared by mom in the electric wok. You see, can we leave technology anytime, anywhere? The uses of technology are huge! For example: if there were no electric cars, it would be inconvenient for us to communicate with distant relatives and friends; if there were no EMUs, it would be difficult for people to travel to various places day and night; if there were no space shuttles, it would be empty talk for people to enter space; if Without icebreakers, it would be difficult for us to conduct expeditions to Antarctica; without spacecraft, landing on the moon would only be a fantasy. On the contrary, with technology, our lives will become better - with faxes, our documents can be retrieved in an instant Pass out with ease! With robots, it can be placed in spaces that are difficult for people to reach; with lasers, fitness equipment can be made; with air conditioners, people can be as comfortable as spring even in hot summers. It is not difficult to see: this
Yes, what people enjoy are the fruits of science and technology! It can be seen from this: Technology has helped us create a superior living environment; technology has improved our quality of life; technology is the crystallization of the wisdom of people all over the world! We live in technology and we must constantly learn new technologies! Technology is all around us, and we must vigorously develop technology. 5. Write a 400-word essay based on science and technology, thank you
Tree rings
Science is really full of wonders, even a single annual ring has a lot of knowledge.
The growth rings of a tree record the age of the tree. Each ring is one year old and has different thicknesses. Even the growth rate of the tree in a year leaves traces in the annual rings. Light lines represent rapid, vigorous growth during the rainy spring, while dark lines represent slow growth during the summer. Scientists use tree rings as weather maps of past eras. The wide growth rings tell people that the growing conditions were favorable at that time - sufficient sunlight and moisture. The narrow growth rings mark a drought year. Narrow growth rings in the center may indicate that other trees are covering it, robbing it of sunlight or moisture. A tree that leans may be prevented from growing upright by competing roots, but it has more wood on the other side to prevent it from toppling over. This is also expressed in the width of the growth rings. If a tree was damaged by a forest fire in a given year, the growth rings will show how its subsequent growth bypassed the damage.
The American "Daily News" once commented: "Sagan is a scientist, he has three eyes.
One eye explores the stars, one eye explores history, and the third eye, which is his thinking, explores the real society..." To be honest, the progress of human civilization needs more people with three eyes like Sagan. Scientist! 6. Composition: Technology changes life (500 words) Three compositions
[1] Technology changes life. Nowadays, technology is becoming more and more developed, and people are gradually entering the information age. Let me do it now Introducing one of the iconic items of the "information age" - the mobile phone. The mobile phone is small, exquisite and lightweight. It has many functions. It can send messages, take photos, check calendars, surf the Internet, and record videos... Among them, the biggest contributor is also The most commonly used ones are to send messages and make calls quickly. In ancient times, it would take several days or longer for people to meet and send a message. There are also letters, you are in Dongcheng and I am in Xicheng. It sometimes takes ten days and a half or even several months to send a letter to me from Dongcheng. What a long wait! However, since I got a mobile phone, my life has changed. If there is an emergency, there is no need to rush, just send a message. It only takes a few seconds for the other party to receive the message. If you want to meet somewhere, just make a phone call. How fast! It saves us a lot of time. Of course, mobile phones do not represent all technology. Now The Internet, artificial communication satellites, etc. have made human life more comfortable and more convenient. In short, technology has changed our lives a lot. [2] Technology has changed my life. With the development of global science and technology, our lives have become more and more important. To enrich. Subways, high-speed rails, airplanes, telephones, mobile phones, automatic elevators, etc. The development of these technologies has changed our lives. Maglev trains do not run closely against the rails, but travel on the track surface in a suspended form. It turns out that it The principle of mutual attraction and repulsion of electromagnetic induction is used to float the train body, and then the electricity generated by solar energy, wind power or water power is used to push the train forward. This kind of train will make no noise, is safe and stable, and will not pollute. Ecological environment. Japan's maglev train uses the magnetic field force induced by electromagnets and coils to levitate the car body. The maglev train in Birmingham, UK, uses the magnetic field force between electromagnets and tracks to levitate the train. Cement mixer trucks are used to transport mud. , and the construction site must use scattered mud. In order to prevent the mud and water from forming hard lumps, they roll while walking. There is a large-scale sports transport truck that is also a round car. It is used to transport liquids. The round design of the liquid tank truck There is a certain reason. First of all, with the same surface of materials, the volume enclosed by the circle is the largest; secondly, the circle has no corners and is not easy to be damaged. The round tank also bears the pressure more evenly. The artificial satellite is a kind of A high-tech communication building, the world must launch an artificial satellite every few years. The satellite is composed of a star, a transponder, a receiving and transmitting antenna, a solar power system, an attitude control and an orbit control system. We can see TV thousands of miles away. Programs are received by satellite transmitting antennas in various areas, and some auxiliary devices are provided respectively. In this way, we can watch TV programs thousands of miles away. High-rise buildings are often found in cities because land prices are expensive and the cost is Use high-rise buildings. There are various forms of high-rise buildings, including square columns, circles, prismatics, etc. The common one-shaped buildings, like a rectangular building block, have poor wind resistance. Cylindrical buildings have better wind resistance. Well, the famous cylindrical building is the Peachtree Center Plaza Hotel in Atlanta, USA. It is the tallest conical hotel in the world. Conical buildings have the best wind resistance and are relatively strong in earthquake resistance. Technology is changing our lives. Technology is changing our lives. It is leading us into a brand new society. As long as we love science, study science, and observe science, we can create a perfect realm! [3] Technology changes life. Times are changing, and science is progressing. Technology is becoming more and more developed, and computers are slowly entering our lives. The Internet has now become an indispensable tool in life, such as chatting, surfing the Internet, and studying. ...However, the emergence of computers has brought changes to people's lives. Primary school students rarely use the Internet to study, most of them play games and chat. Such examples are not uncommon. It is precisely with the emergence of computers that various examples have emerged. Technology changes life. Although technology makes our lives more comfortable, have they seen the deterioration of the environment? The air is getting turbid, people can no longer breathe fresh air, and there is very little snow in winter. Don’t you all know? Technology has not only changed our lives, but animals cannot escape misfortune. The turbid air makes it impossible for animals to survive, and the harsh environment has made most animals on the verge of extinction. Technology changes life, and I hope that technology can truly "change life" one day.
7. A 400-word essay on the development of science and technology
The land beneath our feet is undergoing earth-shaking changes all the time, and all of this stems from technology!
——Inscription
A thousand years ago, people lived a simple and difficult life. At that time. People don't know what the spiritual world is. They just want to be safe, have enough food and drink, and maintain a normal life. For this reason, people burn incense, worship Buddha, and pray for peace. Horse-drawn carriages should be the only means of transportation, but they are expensive and the people have no choice but to walk. It takes a long journey from Shanghai to Beijing. If you contract pneumonia, there is no cure, so people's life span is very short.
Nowadays, someone invented the mobile phone, which alleviated the lovesickness of people in a different place; someone invented the airplane, which eliminated the long journey for people traveling outside; someone invented anesthetics, which prevented people from getting sick. Another layer of pain for the tortured people. It is technology that has made our earth smaller. Nowadays, we are no longer satisfied with material enjoyment, but more of spiritual comfort. Burning incense and worshiping Buddha still exists, but what doesn’t exist is people’s stupid concepts.
The medical technology developed so far can cure almost all common diseases in life. People whose lifespan has been extended have more time to expand and enjoy life. The rapid technological development of natural subjects such as biology and chemistry has brought rich and colorful spiritual food to people who were originally very curious. Human beings affirm their self-worth while exploring and inventing. People also gain happiness while enjoying the benefits brought by technology.
Once upon a time, people were amazed by the stars in the sky; now, we have been able to send satellites into space.
Once upon a time, people thought about how to gain a foothold in this world of the jungle; now, we think about how to survive in this world of overt and covert struggle.
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Technology transforms this society. We need to face up to the power of technology to make our lives better! 8. An urgent 400-word essay on the development of science and technology
1. The development of atomic physics theory enabled mankind to master nuclear energy technology, but it also brought about the nuclear disasters of Hiroshima and Changqi, and brought about the fifty-fifty year of mankind. In the "terrible peace" of 2000, mankind for the first time had the ability to destroy itself.
In addition, there are endless nuclear accidents, with Chernobyl in the Soviet Union being the most famous (please search online for specific data). The development of chemistry has given us an unprecedented ability to transform nature, but Our gunpowder and explosives also harm tens of millions of our fellow humans. Our chemical synthesis technology has allowed us to create things that do not exist in nature, but now we are also troubled by white waste and poisoned by chemical pollution. Why are so many children suffering from leukemia in our country now? This is a very important factor It’s the chemical adhesives used in home decoration, and Freon, which destroys the ozone layer.
The development of oil exploration technology has greatly accelerated the pace of human progress. We can now fly at speeds exceeding the speed of sound, but this has also brought too many wars and too many disturbances, and has also caused the earth to begin to Cold and fever. The development of biotechnology has given us the power to create life that was previously monopolized by God, but it has also brought about ethical chaos.
In short, scientific progress is always accompanied by corresponding disadvantages and dangers. Today we must face up to these negative effects, otherwise we humans may eventually be destroyed by our own hands. 2. This is indeed the case.
But everyone also knows that technology has also had an impact on human health. Mobile phone radiation causes many people to suffer from diseases.
Industrial wastewater has polluted the formerly clear rivers, causing the animals that originally depended on these rivers to drink the water and become sick or even die... Isn't this a drawback caused by the development of science and technology? 3. Haha, it seems that the affirmative debater is ignorant. Although air conditioning is warm in winter and cool in summer, it has its own serious problems.
The emergence of air conditioning keeps us in a comfortable environment all year round. It is precisely because of this that humans are increasingly less aware of natural temperature, so humans cannot adapt to changes in the natural climate.
And the gas emitted by air conditioners is the main culprit in destroying the ozone layer! 4. But the exhaust gas emitted by cars is also a very serious practical problem. It pollutes the air and the environment. Are you willing to stay in a place that is full of smoke all day long? In addition, white pollution is also a problem. Since plastic is not suitable for dissolution, if it is thrown into the land, it will pollute the land and may be eaten by small animals.
This situation is very worrying! ….