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. Acrylic, silk and pure cotton ... are slim, warm and healthy ... countless, which bring us warmth, 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.
Let's take a look at the most common material for building houses-cement. 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 cement, light cement, rubber cement, sugar water cement and color-changing cement. 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 known as "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 3rd, 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, Honda, Mercedes-Benz, BMW ... these are the crystallization of science and technology, releasing the charm of science and 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!