The annual spring outing came again, and we all got on the bus with great expectation. The scene in the car can be called spring breeze! The scenery outside the window is also unique, full of warm breath everywhere. Cars full of smiles are speeding on the highway.
Radar institute, militarized management. As soon as I entered the college, a thunderous cry came into my ears: "one, two, three, four, one, two, three, four." How neat and rigid. Look again, teams of teams, dancing and stepping on the ground, are so handsome and neat, without any fatigue.
In their room, it is also militarized management. Look at that quilt, piece by piece, like tofu, angular. I 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 uniforms holding red flags and marching towards the rostrum with steady steps. When the bright five-star red flag rises slowly, everyone's eyes are condensed and everyone's face is filled with excitement.
What surprised us even more was the sophisticated radar. Look at those radars standing in front of our eyes. The metal tube above the radar is woven into a magical "net". It can emit battery waves at the speed of C. In the 1930s, there was a major breakthrough in radio technology and radar was invented. Now, the radar that can detect long distances day and night is unfolding before our eyes, and I can't help but feel a sense of admiration in my heart. What a great invention, this may be the inevitable result of the development of science and technology!
Today, although we are a little tired, we realize that the rapid progress of today's society can not be separated from the development of science and technology, and it has also increased our strong interest in military affairs. With the development of science and technology, the shoulders of our generation are heavier!
Delete some yourself.
2. Technology changes life If you write an essay about technology changing life, you must focus on the impact of technology on life. So you must write about the importance of scientific and technological reform, and then write about how science and technology change life.
Technology changes life, which is a very big topic. When writing this composition, we must focus on describing all aspects of scientific and technological achievements. If necessary, you can refer to some scientific and technological knowledge, and then write through the influence of science and technology on life, so that the composition will have a more holistic sense. To write such a scientific composition, we must profoundly reflect the characteristics of science and technology, introduce the development of science and technology in detail when necessary, and show the changes of life through the development of science and technology. This is an important writing skill.
If there is no limited type, it is better to write an argumentative essay, focusing on science and technology, but you can't just describe science and technology, you must write about its changes to life, otherwise it will be beside the point, so the core point of science and technology changing life should be written at the beginning of this composition.
3. Composition: The change brought by science and technology is more than 400 words, and science and technology change life 1. Speaking of cars, you must be familiar with them. You will think of JPS, and you will think of higher-speed cars. This is an imaginary car, which can stand up when driving slowly or at rest, solve the shortcomings of large area and truly realize intelligence. It can find the static line in front in a very fast time. People or vehicles shake the steering wheel or handle quickly so that the driver can react quickly, thus avoiding many accidents. 2. Electronic products have also made great progress. The electronic components used in the first computer were about the size of a thumb, and the whole computer had more than 20 thousand electron tubes. Computers are as tall as buildings, but now some computers can be put in your pocket, thus facilitating people's lives. In other words, we can predict the future trend by looking at the present toys. A remote control car was introduced at an exhibition abroad. It can not only exercise on the vertical wall, but also suck on the ceiling like a gecko. It is estimated that such a car will be applied to our life in the future.
Baidu, please.
4. Write a 400-word composition on the topic of science and technology around you, thanks for the first one; "Science" is such a beautiful thing that many scientists are willing to devote their lives to it. Many people think that science is far away from us. In fact, science is around you and me. When the holiday came, I had more time to myself, so I became interested in scientific experiments. I did an egg "shrinking bone" experiment. I cooked the eggs, peeled them and poured them into an empty glass bottle. I stared carefully and found that the egg was shrinking, shrinking and falling slowly. Finally, I suddenly fell into the bottle. Although the book says that eggs will definitely fall into the bottle, I am still dumbfounded when I see this scene, and a little pride arises! "The test was successful!" I can't help crying. Why do eggs shrink and fall into bottles? With questions, I opened the book. It turns out that as the water temperature drops, the space occupied by water in the bottle becomes smaller, so the space occupied by air in the bottle immediately becomes larger. In this way, the air around the bottle will squeeze the eggs and force them to slide into the bottle. Oh, it wasn't "bone shrinkage" that made the egg fall into the bottle, it was the contribution of atmospheric pressure! Then, I did the experiment of "water pressure bubble". I first pour some washing powder into one bowl, stir it, then pour water into another bowl, dip one end of a toilet paper roll in a little washing powder water, and then put the other end into the water. At this time, a colorful bubble appeared. I repeated this experiment and found it really interesting. I didn't blow with my mouth. I just dipped one end of the toilet paper roll in washing powder water and the other end. Colorful blisters will appear immediately. I excitedly asked my parents to enjoy it, and my parents were amazed. They asked me what scientific reason this experiment contained, and I found the answer from the book: when we slowly immersed the scroll in clean water, the atmospheric pressure pushed the water in the bowl into the scroll, and the air in the shaft was squeezed and gradually rose, thus pushing the washing powder film to swell. Because the washing powder film has surface tension, it will not break after swelling. I see! I have gained another scientific knowledge. Dad wants to move two big glasses, and wants me to cooperate, but he is worried about breaking them. What should I do? Dad dropped a few drops of water on one cup, and then we carefully covered the other cup. As a result, the two cups actually stuck together. We easily moved two large glasses to a safe place. I'm a little puzzled: why can a few drops of water stick two cups tightly together? The book "Science" made me understand the mystery: the reason why glass sticks tightly together is because there is adhesion between glass molecules and water molecules. Adhesion is a strong attraction between different substances and molecules. Under the action of this force, two pieces of glass stick together tightly and it is difficult to separate. It seems that science is in our life. As long as we observe and think carefully and combine books with practice, we can discover scientific principles. Everyone is familiar with the word technology. Simply put, technology is technology. In a broad sense, it refers to the sum of natural science and technology and social science and technology. Since the reform and opening up, with the passage of time, science and technology have mushroomed in the motherland. Looking around life, technology is everywhere, and technology is by my side! Walking on the road at night, there are electric lights to illuminate us; Call a friend and take out your mobile phone at your fingertips; Back home, turn on the TV to watch the news, turn on the computer and chat with friends; Mother steamed rice with a rice cooker; Turn on the electric heater; The family sat around and enjoyed the delicious food prepared by their mother with an electric wok. Do you think we can leave technology anytime and anywhere? Technology is very useful! For example, if there is no electric car, it will be inconvenient for us to communicate with distant relatives and friends; If there is no EMU, it will be difficult for people to travel everywhere. Without the space shuttle, it would be empty talk for people to go into space; If there were no icebreakers, it would be difficult for us to go to Antarctica. Without space equipment, people would only dream of landing on the moon. On the contrary, with technology, our life will be better-with fax, our documents can be easily transmitted in an instant! With robots, you can be in a space that people can't reach; Using laser, you can make fitness equipment; With air conditioning, even in hot summer, it can make people feel comfortable as spring. It is not difficult to see that all this is the result of science and technology! This shows that technology has helped us create a superior living environment; Science and technology have improved our quality of life; Technology is the crystallization of the wisdom of people all over the world! We are engaged in technology, and we should constantly learn new technologies! Science and technology are around us, and we must vigorously develop science and technology.
5. Write a 400-word composition with science and technology, and thank the tree rings.
Science is full of wonders, and even the annual rings have been asked by universities.
Tree rings record the age of trees. Each annual ring is a year with different thickness. Even the growth rate of trees in a year will leave traces in the annual rings. Bright lines indicate rapid and vigorous growth in rainy spring, while dark lines indicate slow growth in summer. Scientists use tree rings copied from trees as weather maps for the past few years. The broad annual rings tell people that the growing conditions at that time were superior ―― there was plenty of sunshine and water. The narrow rings marked the drought that year. Narrow rings in the middle can indicate that other trees cover it and take away sunlight or water. An inclined tree may be pushed by competing roots and cannot grow upright, but it will grow more wood on the other side to prevent toppling. This is also reflected in the width of the annual rings. If a tree is damaged in a forest fire in a certain year, the tree rings will show how its subsequent growth bypasses the scar.
The American Daily News once commented: "Sagan is a scientist. He has three eyes, zhidao. One eye explores the starry sky, one eye explores history, and the third eye, that is, his thinking, explores the real society ... "To tell the truth, the progress of human civilization needs more scientists with three eyes like Sagan!
6. Composition: Technology changes life (500 words) Three compositions [1] Technology changes life At present, technology is more and more developed, and people are gradually entering the information age. Now let me introduce one of the iconic items in the information age-mobile phone. Small and exquisite appearance, very light. It has many functions, such as sending messages, taking photos, checking calendars and so on. It is also the most commonly used way to send messages and make phone calls quickly. In ancient times, it took several days or more for people to meet and send messages. And writing letters, you are in Dongcheng, I am in Xicheng, and it sometimes takes ten days, half a month or even months to send me letters from Dongcheng. What a long wait! However, since I got a mobile phone, my life has changed. If there is an emergency, don't worry. Just send a message and the other party will receive it in a few seconds. If you want to meet somewhere, just call. How fast! Let's save a lot of time. Of course, mobile phones don't represent all technologies. Nowadays, the Internet, artificial communication satellites and so on all make human life more comfortable and convenient. In short, technology has greatly changed our lives. [2] Science and technology have changed my life. With the development of global science and technology, our life is getting richer and richer. The development of these technologies has changed our lives. The maglev train does not run close to the rail, but runs on the rail surface in the form of suspension. It turns out that it uses the principle of electromagnetic induction to attract and repel to make the train body float, and then uses solar energy, wind power or water power to drive the train. This kind of train will not be very noisy. Will not pollute the ecological environment. In Japan, the car body is suspended by the magnetic field induced by electromagnet and coil. In Birmingham, England, the train is suspended by the magnetic field between electromagnetism and track. Cement mixers transport mud, and loose mud blocks are used in the construction site. In order to prevent the mud from caking, it rolls as it walks. There is a large sports transport vehicle, also a round box, which is used to transport liquids. The circular design of liquid tanker is reasonable. The round tank has no edges and corners and is not easy to be damaged. The pressure on the circular tank is relatively uniform. Satellites are high-tech communication buildings, which are launched every few years. The satellite consists of stars, transponders, receiving and transmitting antennas, solar power supply system, attitude control and orbit control system. We see TV programs thousands of miles away receiving wars from satellite antennas to various regions. Some auxiliary equipment will be provided separately. In this way, we can watch TV programs thousands of miles away. High-rise buildings are very common in cities, so we have to use them because of the high land price. There are various shapes of high-rise buildings, such as square columns, circles and prisms. Common zigzag buildings, like rectangular building blocks, have poor wind resistance. Cylindrical buildings have better wind resistance. The famous cylindrical building is the Peach Tree Central Plaza Hotel in Atlanta, USA, which is the tallest conical hotel in the world. Conical buildings have the best wind resistance and strong earthquake resistance. Science and technology are changing our lives and 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. With the development of science and technology, computers are slowly entering our lives. Network has now become an indispensable tool in life, such as chatting, surfing the Internet and studying ... However, the appearance of computers has brought changes to people's lives. Pupils seldom study online and spend most of their time playing games. Chat This kind of example is not uncommon. It is with the advent of computers that there are all kinds of examples. Technology has changed our lives. Although technology has made our life more comfortable, have they seen the deterioration of the environment? The air is getting more and more turbid, people can no longer breathe fresh air, and it seldom snows in winter. Don't you know? Technology has not only changed our lives, but animals are also doomed. The turbidity of the air makes animals unable to survive, and the harsh environment makes most animals on the verge of extinction. Technology has changed their lives, and I hope that one day technology can really "change their lives".
7. A 400-word composition on the development of science and technology. The land under our feet is undergoing earth-shaking changes all the time. It all comes from technology!
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A thousand years ago, people lived a simple and hard life. At that time. People don't know what the spiritual world is. They just want to be safe, eat and drink, and maintain a normal life. To this end, people burn incense and worship Buddha and pray for peace. Carriage should be the only means of transportation, but it is very expensive, so people have to choose to walk. It takes a long time from Shanghai to Beijing. If you have pneumonia, there is no cure, so people's life span is very short.
Now someone has invented the mobile phone, which has eased the lovesickness and melancholy of people in different places; Someone invented the plane and gave up the long journey of people running around outside; Someone invented an anesthetic to prevent people with this disease from suffering another layer of pain. It is science and technology that has made our earth smaller. Now we are no longer satisfied with material comforts, but more comfortable mentally. Burning incense and worshipping Buddha still exists. What doesn't exist is people's stupid ideas.
The medical technology developed at present can cure almost all common diseases in life, and the extended people have more time to expand and enjoy life. The rapid development of natural science and technology such as biology and chemistry has brought rich and colorful spiritual food to people who were originally curious. While exploring and inventing, human beings affirmed their self-worth, and while enjoying the benefits brought by science and technology, they also gained happiness.
Once, people marveled at the stars all over the sky; Today, we have been able to send satellites into space.
Once, people were thinking about how to gain a foothold in this law of the jungle world; Nowadays, we are thinking about how to survive in this infighting world.
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To transform this society by science and technology, we need to face up to the power of science and technology and make our life better!
8. A 400-word essay on the development of science and technology 1. The development of atomic physics theory has enabled mankind to master nuclear energy technology, but it has also brought about the nuclear disasters in Hiroshima and Nagasaki, and brought about the "terrible peace" of mankind for 50 years. For the first time, mankind has the ability of self-destruction.
In addition, there are endless nuclear accidents, among which Chernobyl in the Soviet Union is the most famous (please search online for specific data). The development of chemistry has given us unprecedented ability to transform nature, but our gunpowder and explosives have also hurt tens of millions of human compatriots. Our chemical synthesis technology has created things that do not exist in nature, but now we are also troubled by white garbage and poisoned by chemical pollution. Why are so many children suffering from leukemia in our country now? Very important factors are chemical adhesives used in home decoration and ozone-destroying freon.
The development of petroleum exploration technology has greatly accelerated the pace of human progress. We have been able to fly faster than the speed of sound, but it has also brought too many wars and too much interference, and the earth began to catch a cold and have a fever. The development of biotechnology has given us the power to create life monopolized by God before, but it has also brought about ethical disorder.
In short, scientific progress is always accompanied by corresponding drawbacks and dangers. Today, we must face up to these negative effects, otherwise we humans may eventually be destroyed in our own hands. 2. That's true.
However, as we all know, technology has also brought an impact on human health. Cell phone radiation makes many people sick.
Industrial wastewater pollutes the original clear rivers, and animals living in these rivers in the past will get sick or even die after drinking this water ... Isn't this the disadvantage brought by the development of science and technology? Hehe, it seems that the debater is ignorant. Although air conditioning is warm in winter and cool in summer, the problem is serious.
The appearance of air conditioning makes us in a comfortable environment all year round. Because of this, human's perception of natural temperature is getting weaker and weaker, so human can't adapt to the change of natural climate. And the gas emitted by air conditioners is the chief culprit in destroying the ozone layer! However, the exhaust gas emitted by automobiles is also a very serious practical problem, which pollutes the air and the environment. Would you like to stay in a place full of smog? In addition, white pollution is also a problem. Because plastic is insoluble, throwing it in the ground will pollute the land and be eaten by small animals.
This situation is very worrying! ……。