Life, at the very beginning, is just survival, and when human beings break the laws of nature again and again to create scientific miracles, our survival becomes life, and what is extra is a kind of enjoyment. Until today, our city life is still improving gradually. As a middle school student in Beijing, I think technology has changed our lives.
Last weekend, I accompanied my mother to the hospital for a physical examination. I was reluctant at first. I can't wait to stay away from my sister who was unkind to me in the hospital! But at that time, for various reasons, I couldn't escape and had to go.
In the hospital, I was surrounded by the smell of medical supplies, especially in the blood drawing room, as if I could smell blood! I was just about to turn away when I was attracted by the needle in the hand of the nurse's sister.
The needle of the needle tube is thin and long. When no one is around, I secretly pick it up and observe it. The needle is hollow and has a sharp bevel. This is a butterfly needle. The back of the needle is connected with a hose which is connected with another common needle. Needle and needle are separated, and each needle is filled with rubber plugs of different colors, and the length of the needle is also different. When an injection is performed, the protective plastic of the butterfly needle is pulled out and inserted into the blood vessel. When the nurses saw blood flowing into the hose, they pulled out the protective plastic of the ordinary needle at the other end and quickly stuffed it into the plastic plug of the needle tube, and then the blood would flow into the needle tube itself! No need for nurses to draw blood manually! I've always been afraid of injections, and I'm willing to take my own blood test today! When I got home, I asked my grandfather who had been a doctor for more than 40 years. Grandpa said that the needle tube is a vacuum tube, and now all major hospitals in Beijing have begun to use this magical needle tube.
Although the blood drawing procedure is a little more troublesome than the traditional needle tube, it is very safe to draw blood with this needle tube, and the used needle tube will destroy the structure itself and cannot be used again, and obviously it does not need superb technology and rich experience, which not only facilitates the work of the nurse sister, but also reduces the pain of the blood drawer (my mother told me). What a kill two birds with one stone!
Grandma said: the person who invented the washing machine deserves the Nobel Prize most! Because it liberates women's laundry life. Grandpa has always loved high-tech electronic products because it has brought the world closer. Mom and dad think microwave oven is particularly important in life, because it greatly saves cooking time. In my opinion, the more subtle things, the more subtle technology, even gadgets that people are too lazy to pay attention to in their leisure time, and more importantly, they have changed our lives and benefited the people, that is, the more technology can be brought into life, and at the same time, the technological outlook of Beijing has been changed.
This technology needle is so small in Beijing, a big city, but it reduces the pain of patients. The so-called technology changes life, not only refers to the spacecraft flying into space, but also refers to those who benefit civilians and let people truly experience the power of technology in their lives.
Technology is progressing bit by bit, and it is also changing our lives bit by bit.
Essay on Science and Technology Changing Life (2)
Science and technology, as the name implies, is science and technology. Everyone should be familiar with science and technology, because it is used and served by us and it is closely related to our lives. It not only brings us spiritual pleasure, but also physical comfort. In this rapidly developing society, science and technology represent a kind of spirit as well as a kind of strength. It represents an innovation and a civilization. It is an important symbol to measure a country's comprehensive national strength, and science and technology occupy an important position in any field.
Science and technology are widely used, including military, biological and aerospace. Technology has been integrated into life and enriched it. In the street, at home, in the classroom and in the shop, technology has brought convenience to people. It can be said that human beings created science and technology, and science and technology also created human beings. Human beings and technology are interdependent. Our food, clothing, housing and transportation are inseparable from technology. Let me take you into the wonderful life of science and technology.
Clothes make the man, and everyone needs clothes to dress himself. Take a closer look at the clothes we wear, such as acrylic, silk and pure cotton, which are slim, warm and healthy. They bring us warmth and comfort, health and happiness. These clothes can't be made without technology. Let's say warm clothes can make you feel warm. In the cold winter, we don't have to wear thick down jackets and sweaters, but only a light and soft warm clothes can make us feel warm. You see, isn't this the convenience brought by technology?
Let's see what we eat. Now, we should pay attention to everything we eat, that is health! With the progress of society and the development of human beings, people's concept of food has also changed, not only pursuing delicious food, but also demanding healthy and nutritious food. Nowadays, many people eat high-tech foods, such as protein powder, calcium tablets and dietary fiber. , are studied by scientific and technological personnel. Today, we talk about a high-tech food: vegetable juice drink. Vegetables are an important source of vitamins and minerals and the guarantee of life and health. In terms of nutrition and health care, vegetables can provide comprehensive nutrition and prevent or even treat nutritional deficiency. However, because the taste of vegetables is not accepted by most people, scientists and technicians have improved vegetables and made a delicious vegetable juice drink, which has become an ideal future drink.
Next, let's look at cement, which is the most common material for building houses. Cement is a brownish gray powder made of limestone and clay. When it is used, it becomes hard and abnormal when mixed with water. In recent years, with the development of new technology, functional cement has been continuously developed. There are many kinds of high-tech cement, such as glass glue, light cement, rubber cement, sugar water cement, color-changing cement and so on. They all have their own characteristics and are the crystallization of science and technology. Today I'm going to introduce you to a magical cement: color-changing cement. This kind of cement is not only an ideal building material, but also can be used to forecast the weather. Also called meteorological cement. It is blue when the weather is dry. Once wet, it turns purple; If it rains, it will become a bright rose after absorbing water. It changed color because cobalt dioxide was added to the cement. Look, isn't it amazing? In fact, this is also the surprise and convenience brought by technology.
Speaking of cement, let's talk about cars. The car is a convenient and important means of transportation. Whether traveling or going to work, it is convenient to have a car. Looking back at the history of automobile development,1On July 3, 956, the first medium-sized truck named Jiefang was born in China, ending the history that China could not make a car. Later, Dongfeng brand domestic cars were produced; The first 2.2-ton military off-road vehicle; First adopt 60 dump trucks; The first coach and the first red flag car, etc. Today's Honda, Mercedes-Benz and BMW are the crystallization of science and technology, releasing the charm of technology. It is the development of science and technology that has brought us today's convenient cars. It can be seen that science and technology have made great contributions to us, and everything we have today cannot be separated from science and technology.
Science and technology have played an important role in food, clothing, housing and transportation, facilitating and benefiting mankind.
In the rapidly developing 2 1 century, technology is not mysterious. It is hidden by your side. As long as you observe it carefully, you can also invent your own technology. Perhaps the small technology you invented, after being modified and perfected by experts, has become a veritable scientific and technological product, and can also make great contributions to the future society and mankind.
Students, science and technology is a magical and great cause, which brings infinite joy and convenience to our lives, allowing us to understand, discover and create science and technology. I believe that technology comes from life, and life cannot be separated from technology. Let's use our wise eyes to discover technology!
Essay on Science and Technology Changing Life (3)
With the development of global science and technology, our life is getting richer and richer. Subway, high-speed rail, plane, telephone, mobile phone, escalator, etc. 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 attraction and repulsion principle of electromagnetic induction to float the train body, and then uses solar energy, wind power or hydraulic power to push the train forward. This kind of train will not be noisy, safe and stable, and will not pollute the ecological environment. The maglev train in Japan levitates the car body by using the magnetic field generated by electromagnets and coils. The maglev train in Birmingham, England levitates the train by using 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 forming lumps, I rolled while walking. There is a large sports transport vehicle which is also a round box. It is used to transport liquids. The circular design of liquid tanker has some truth. First of all, under the condition of the same surface area of materials, the volume surrounded by circles is the largest; Then it is round, without edges and corners, and it is not easy to be damaged. The pressure of the circular tank is also relatively uniform.
Satellites are high-tech communication buildings. Every few years, a satellite must be launched to the whole world. Satellite consists of stars, transponders, receiving and transmitting antennas, solar power generation system, attitude control and orbit control system. We see that TV programs thousands of miles away are receiving wars from satellite antennas to various regions, and some assistance 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 they have to be used because of the high land price. There are many forms of high-rise buildings, such as square column, circle and prism. Common zigzag buildings, like rectangular building blocks, have poor wind resistance. Cylindrical buildings have good 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.
Technology is changing our lives, and 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!