huge energy, which he called "quarte", which is known as the
discovery of the century.
stainless steel before 193, steel was not only easy to rust, but also easy to be corroded. From 193 to 1912, stainless steel became an outstanding industrial metal as soon as it appeared. Nowadays, stainless steel is not only used in industry, but also widely used in medical treatment and human body.
before air-conditioning, the emperor of China wanted to get the ice from the mountains in summer. In 1911, American W.
Carrier invented air-conditioning, and man began to conquer nature.
aspirin In 1897, felix hoffman, a German, synthesized acetylsalicylic acid. Two years later, it was registered as aspirin, and it became the most popular medicine a century later.
automobiles in 1913, Henry Ford, an American automobile manufacturer, officially started his automobile assembly
assembly line, which reduced the cost and improved the efficiency, and made automobiles enter the homes of ordinary people, which became a major event with decisive influence in this
century.
airplane on August 14th, 191, the first powered airplane began to fly. In 1933, the first regular air route in the world was opened, which greatly expanded the space for human activities.
electric light in 1913. After the patent of tungsten wire was obtained, electric light began to shine brightly.
fax was first transmitted in 192, and it was used in business in 1926.
Movies became a kind of entertainment on December 28th, 1895. The first popular audio film
Jazz Singer was released in new york in October l927, the first color film
Vanity City was released simultaneously in Britain and the United States in 1935, and the first wide-screen film came out in 1953.
Copier In 197, the world's earliest photographic copier appeared in new york, USA.
In p>1959, after the Xerox 914 electrostatic copier came into the market, it began to be widely used.
color photos have the principle of color photography since the last century, but it was not until the 194s
that the first batch of color films appeared, and color photos have gone through a long way across the century.
Television The per capita possession of television in the world today is extremely high (one for every 1 people on average)
It started in 1927 and was started by Americans.
The world's largest computer network invented by the Internet in this century, which is made up of many interconnected networks, together with TV sets, enables the world news that happens every day to spread to every corner of the earth in time, thus opening the curtain of the information age.
laser the first laser was born in 196.
contact lenses were invented in medieval glasses, and substantial progress was not made until the appearance of contact lenses in 1945. In 1964, soft contact lenses were invented.
heart recorder In 1958, Swedish Oksen Ning invented the heart recorder, which was applied in the 6
generation. Up to now, countless lives have been saved by it.
The development of electronic computers began in World War II, and the first computer
similar to today's electronic computers was manufactured in 1943.
penicillin was first developed by Fleming in Britain in 1929, and was used in soldiers injured in World War II in 1941, which is regarded as the invention second only to the atomic bomb.
the contraceptive pill was developed in 1959, and human beings began to control their own birth rate.
Plastic, which did not exist before this century, has become an indispensable thing in our century.
It started with the manufacturing method of phenolic plastic invented by American L. Baekeland in 199.
radar since 1935, people began to use extremely short radio waves to detect distant or
invisible targets.
Radio In 191, the Italian Marconi successfully conducted the first radio communication.
In p>1948, transistor radio was invented.
X-ray, which existed in 1895, was not applied to medical treatment until the first decade of this century, and only then
did it exert its great energy.
nuclear energy was realized in 1939 and was used for power generation in 1956.
wristwatches, one of the inventions with many changes in human history, appeared in 194 as a more comfortable wristwatch.
Artificial Kidney Willem Koff designed the first artificial kidney in 1945. This hemodialysis device
prolonged the lives of countless people with renal failure.
robots in 1983, Volkswagen ag in wolfsburg, the federal Republic of Germany manufactured and produced the first robot
.
Sputnik On October 4th, 1957, the first Sputnik launched by the former Soviet Union ushered in the space age of human beings.
in the history of credit card money, the appearance of credit card is the biggest revolution since the appearance of money. The first
credit cards were issued in the 192s, and the commonly used credit cards were issued in 195.
blood transfusion in 19, Karl Rand discovered human blood type, which made blood transfusion possible.
cloning technology In 1997, British scientists successfully bred the cloned sheep Dolly.
Before that, the only shortcoming of all the imaginative creations of human beings was that "people can't make
people". Therefore, human beings have long attributed this most magical creation to the mysterious force that can't be seen or touched. The birth of cloning technology has shattered the last myth of the 2th century.
In addition to the above-mentioned important inventions, two other great achievements of mankind in this century will also
go down in history:
Another greatest achievement of the United Nations in this century is that mankind has found the road to peace
, and the United Nations came into being due to the bloody lessons of the two world wars. We have seen this effect in the Bosnian Black War, the Cambodian civil war and the Middle East peace talks.
In the past, many international disputes in world trade were mostly about fighting for resources, and the cost of war was often too expensive to pay for it. International trade enables the global resources to be freely
exchanged in a peaceful state, and the flow and distribution of resources can be obtained through tariff and non-tariff negotiations, and the necessity of war is reduced to a minimum. With the rapid economic development and the shortage of resources, it is a great achievement that there has been no war for 5 years.