20 What are the most significant scientific and technological developments and advances of mankind i

Today, the teacher assigned an essay. The requirement is to read the text taught today to your father or mother, ask them to talk about the changes brought about by the development of technology, and then write down their words.

As soon as I entered the house and put down my school bag, I couldn't wait to shout loudly, "Mom, Mom, come here, please tell me, what changes technology has brought to us?" Mom said

Look at you, like a fire burning your eyebrows, let me tell you slowly. Technology has brought so many changes to people. For example, the invention of the earliest gunpowder enabled human beings to split mountains and open roads, build bridges, and build, which led to the development of various undertakings, and the military industry also developed rapidly; With the advent of papermaking and printing technology, human beings have the conditions for writing, and have promoted extensive exchanges in culture, art, language, science and technology, economy, etc.; The invention of the compass promoted the development of navigation and the world, completed the great geographical discoveries, and enabled mankind to understand the earth; The current scientific and technological achievements of hybrid rice and super rice have increased grain production and solved the problem of feeding the world's population; Like a god.

Five, God six....These shuttles helped astronauts get to the moon, explore Mars, and roam space; Sputnik provides us with satellite images and weather forecasts, as well as television signals. Robots can do many things that humans can't, such as diving into the deep sea to investigate, breaking into fires to save people; The maglev train is particularly fast, saving people time when traveling; People use atomic energy to generate many, many more electricity...

Two people are separated by thousands of mountains and rivers, but as long as they pick up the earpiece and dial a few numbers, it doesn't take a few minutes to hear each other's voices and communicate in language, which is the miracle that ** brings to human beings. It's not enough to have **, human beings have invented computers, computers are better than **, **can only hear each other's voices, and computers can communicate in text, and can also **talk, and can see each other. If there is a holiday, send an e-mail, and the other party can receive it in a few seconds, which can not only save paper, but also quickly let others receive ......The development of science and technology has improved our living standards and improved the quality of life!

In the 20th century, human beings invented many useful items for us, such as: computers, televisions, ......These items make it very convenient for modern humans to do something.

Two people are separated by thousands of mountains and rivers, but as long as they pick up the earpiece and dial a few numbers, it doesn't take a few minutes to hear each other's voices and communicate in language, which is the miracle that ** brings to human beings. It has been invented for more than 100 years, and in modern society, it has become an important part of people's work and life. For example:

If grandparents are sick, as long as they give a ** and think that the illness is not very serious, they can remind them what medicine to take or what to pay attention to. In the 20th century, it was the first to bring us convenience.

It's not enough to have. Humans have invented computers again, and computers are better than **, **can only hear each other's voices, and computers are.

Semiconductors, the foundation of our current electronics.

<> 20th century, human scientific and technological achievements include computers, artificial satellites, nuclear satellites, radars, and airplanes.

1. Computer: commonly known as computer, is a modern electronic computer machine for high-speed calculation, which can perform numerical calculations and logical calculations, and also has the function of storage and memory. Inventor of the computer John von Neumann.

It is one of the most advanced scientific and technological inventions of the 20th century.

2. Artificial satellite: an unmanned spacecraft orbiting the earth in space orbit. Artificial satellites basically orbit the earth according to the laws of celestial mechanics, but the actual motion is very complicated due to the influence of the non-spherical earth's gravitational field, atmospheric drag, solar gravity, moon gravity and light pressure in different orbits.

3. Nuclear: The use of self-sustaining nuclear fission or fusion reaction instantaneously released huge energy to produce a first-class effect, and has a large-scale damage and destructive effect.

4. Radar: that is, using radio methods to discover targets and determine their spatial positions. For this reason, radar is also known as "radiolocation."

5. Aircraft: refers to a heavier-than-air aircraft with one or more engines that generates forward thrust or pull, generates lift by the fixed wings of the fuselage, and flies in the atmosphere. The airplane is one of the most significant inventions of the early 20th century, recognized as invented by the American Wright brothers.

If people could invent a time machine that transported the brightest minds in human society from 1900 to the world today, they would be amazed at the way modern humans deal with problems that have plagued humanity for centuries.

It's hard to imagine how much humanity has made a leap forward in science and technology in the past 100 years. 100 years ago, people didn't know how they inherited and passed on human traits, how a single cell could grow into a complete organism. People don't know that atoms have structure in themselves (the word atoms itself means indivisible), or why gravity exists.

People also don't know how it all started, whether it's life on Earth or the universe itself. Now, thanks to the continuous development of basic research, one can answer, or at least begin to answer these mysteries.

The answers to these questions have changed the way people see the world and are changing their daily lives. Therefore, today it is reasonable to assume that these changes are due to the interaction of basic science and technology, each of which is driving technology forward.

See the scientific and technological variables in the "great changes unseen in a century":

Compared with previous waves of science and technology, although the new wave of science and technology brought about by the fourth industrial revolution in human history has maintained a certain historical continuity with it, its all-round and "luxury" lineup composed of cutting-edge technologies such as artificial intelligence, robotics, virtual reality, 5G, big data, cloud computing, quantum technology and life sciences has the new characteristics of "total revolution" that it did not have in the past.

This has made the relationship between man and nature, the relationship between man and man, the relationship between life and non-life, and other key aspects of the relationship between human beings and the world have reached a critical point from quantitative change to qualitative change.

The rapid transformation of this industrial civilization to the post-industrial civilization and information civilization stage has made the power of science and technology more deeply rooted in people's daily work, life, and perception of the outside world and themselves than ever before.

The above content reference: People's Daily Online - See clearly the scientific and technological variables in the "great changes unseen in a century".

There is much to remember about the past century, many of which have changed our lives dramatically, and the predictions of thinkers have often come true.

The American scientist Benjamin Franklin once said: In the future, human knowledge will increase greatly, and new inventions that we cannot think of today will appear again and again, and I sometimes almost regret that I was born too early, so that I could not know what new things will appear. He was right.

In the past 100 years, human science and technology can only be described by leaps and bounds, if an inventor in 1900 looks at today's world, he will recognize cars, **, airplanes, he can also imagine spaceships, deep-sea submarines, but he will definitely know nothing about computers, the Internet, genetic engineering, nuclear energy.

Now, knowledge has given mankind unprecedented self-confidence and optimism, and one writer wrote: "I sincerely believe that we live in the greatest age of knowledge in human history, and there is nothing we do not understand", "As long as people can think of things, there are always people who can do it." The development of technology in the 20th century has made this statement more and more like the truth.

The progress of science and technology has completely changed the way of human existence, and it has also changed the direction of human thinking. In the next 10 to 20 years, there is no doubt that science and technology will make breakthroughs and expansions in many fields.

Maybe the human brain and the computer can be integrated, maybe we can settle on Mars, maybe everyone can clone spare organs, maybe we can review the scientific and technological inventions that brought great changes to human life in the 20th century, look forward to the future development trend of science and technology, and enter a new era of knowledge economy.

Nearly 100 years of scientific and technological development:

Major breakthroughs have been made in the development of methanol to low carbon olefins technology and industrial testing.

A major breakthrough has been made in the industrial pilot project of "Methanol to Low Carbon Olefins (DMTO) Technology Development", which was cooperated by the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences, Shaanxi Xinxing Coal Chemical Technology Development Co., Ltd. and Sinopec Luoyang Petrochemical Engineering Co., Ltd.

Nearly 100 methanol conversion, ethylene selectivity, propylene selectivity, and low carbon olefins (ethylene, propylene, butylene) selectivity of more than 90 percent were achieved on an industrial test plant with a daily processing capacity of 50 tons of methanol. The successful operation of the pilot plant is of great economic and strategic significance to China's comprehensive utilization of energy and the diversification of low carbon olefin raw materials.

Answer: In the 20th century, human beings used modern technology to make discoveries: penicillin, laser. Inventions include: electric light, **, etc.

The major inventions and discoveries of mankind in the 20th century are: Marconi in Italy in 1901 invented radio communication, in 1903 the Wright brothers in the United States invented the airplane, in 1907 the Belgian B. Beckland invented plastic, in 1928 Fleming discovered penicillin in the United Kingdom, in 1923 Baird invented the television set in the United Kingdom, and in 1942 the United States nuclear ** was successfully developed.

In 1943, the British Turing computer, in 1953, the British scientist Crick and the American scientist Watson discovered the double helix structure of DNA, in 1957, the Soviet Union launched the first artificial satellite, in 1967, the South African surgeon successfully performed an organ transplant, and in 1978, the first test-tube baby was born in the United Kingdom.

It is the process and result of applying the laws of nature to solve unique problems in the field of technology and proposing innovative solutions and measures. In order to meet the needs of people's daily life, the invention provides an unprecedented model of artificial natural objects, provides new processes and methods of processing and production, as well as machinery and equipment, instrumentation and various consumer products, and innovates and transforms manufacturing processes, production processes and detection and control methods.