Science and technology are widely used, including military, biology and space flight. Science and technology have been integrated into and enriched life. In the street, at home, in the classroom and in the shop, science and technology have brought convenience to people. It can be said that human beings created science and technology, and human beings and technology are interdependent. Our food, clothing, housing and transportation are inseparable from technology. I'll talk about it here.
Clothes make the man, and everyone needs to dress himself up with clothes. Take a closer look at the clothes we wear, such as acrylic, silk and pure cotton, which are slim, warm and healthy, and bring us warmth, comfort, health and happiness. And the production of these clothes is inseparable from technology. Let's say warm clothes can make you feel warm. In the cold winter, we can.
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. They not only pursue good taste, but also require healthy nutrition. Nowadays, many people eat high-tech foods, such as protein powder, calcium tablets and dietary fiber. These have been studied by scientific and technological personnel. Today, we talk about a kind of high-tech food: vegetable juice drink. Vegetables are an important source of vitamins and minerals for human beings and the guarantee of life and health. In nutrition and health care, vegetables can provide comprehensive nutrition, prevent and even treat malnutrition. 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 kind of brown-gray powder made of limestone and clay, which becomes hard and abnormal when it meets water. In recent years, with the development of new technology, functional cement has been continuously developed. There are many kinds, such as glass glue, light glue, rubber glue, sugar glue, color-changing glue and so on. This is the crystallization of science and technology. Today I'm going to introduce a magical cement: color-changing cement. This kind of cement is not only an ideal building material, but also can be used to predict 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. The color changes because cobalt dioxide is added to the cement. Look, isn't it amazing? In fact, this is also the surprise and convenience brought by technology.