If money is the value measure of commodities, then time is the value measure of efficiency. Therefore, a person who is inefficient will pay a high price for it. So let me introduce to you what holiday today is and the major events that happened on October 15th in history.
Q: What day is October 15th? Answer: October 15th is the day of the world’s first test flight of a supersonic aircraft.
The world's first supersonic aircraft test flight On October 15, 1947, an American rocket plane successfully conducted the world's first supersonic flight. This is a great progress in the history of human aviation. In response to the weaknesses of propeller aircraft, scientists invented the jet aero engine, which uses the reaction force of the high-speed jet of gas flow from the engine itself to propel the aircraft. This kind of engine has large thrust, light weight, small head-on size, and is suitable for high-altitude and high-speed flight.
Selected historical events on October 15th October 15th, 1844, the birthday of the German philosopher Nietzsche October 15th, 1915, the birthday of the Israeli "brainless" Shamir October 15th, 1924, the United States On October 15, 1957, the birthday of automobile king Iacocca, the central government formulated the criteria for classifying "rightists". On October 15, 1957, the Wuhan Yangtze River Bridge was completed and opened to traffic. On October 15, 1961, Zhou Enlai participated in the 22nd Party Congress of the Soviet Union. Congress, clarifying the position of our party. On October 15, 1970, my country established diplomatic relations with Equatorial Guinea. On October 15, 1984, the Chinese-American writer Jiang Nan was killed. On October 15, 1986, the Chinese-American Li Yuanzhe won the Nobel Prize in Chemistry in 1990. On October 15, modern poet and red scholar Yu Pingbo died of illness in Beijing. On October 15, 1993, Mandela and de Klerk both won the Nobel Peace Prize. On October 15, 1997, the Chinese-American Steven Chu won the Nobel Prize. Physics Award On October 15, 1998, thousands of people performed Tai Chi in Tiananmen Square
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