2. Franklin,/kloc-an outstanding American scientist and politician in the eighth century, was called "the father of electricity" because of his electrical achievements such as inventing lightning rods.
Before Franklin, people did not have a correct understanding of lightning. Inspired by an electrical experiment, Franklin came to the conclusion that lightning is a discharge phenomenon. In order to prove his idea, he was determined to shoot down the lightning in the sky.
1752 On a thunderstorm day in July, he and his son made a famous kite experiment. He tied a big silk handkerchief to a Chinese fir cross to make a kite. Kites are fixed with thin iron wires that protrude upwards by tens of centimeters. Thin iron wire is connected with thin hemp rope and used to fly kites. The lower end of the hemp rope is tied with a ribbon, and a copper key is hung on the ribbon.
Kites carry lightning into the clouds, and lightning flashes on kites.
A flash of lightning made Franklin feel a little numb in his hand holding the hemp rope. When he put his finger near the copper key, suddenly, an electric spark hit his hand. . Later, he collected "celestial electricity" with a Leiden bottle for experiments, which proved that "celestial electricity" can be conducted by metal like geoelectricity, melting metal and igniting alcohol. Since then, people have realized that the essence of lightning is the discharge phenomenon in the atmosphere.
Franklin first put forward the idea of lightning rod, and after many experiments, he made a practical lightning rod. Kant, a great German philosopher, praised him and said, "Franklin was the second Prometheus who took fire from heaven."
3. The distribution of glaciers is an important basis for studying geological structures. Some foreigners have visited the glaciers in China and asserted that "there are no Quaternary glaciers in China". Geologist Li Siguang put forward "Let the facts speak for themselves" and devoted great energy to the study of glaciers.
192 1 year. After he returned to China, he found the Quaternary glacial remains near Shahe County in Taihang Mountain and Kouquan in Datong Basin, Shanxi Province. Although he was denied by some foreign experts, he did not lose courage and confidence. He continued to lead students to visit Taihang Mountain, Jiuhua Mountain, Tianmu Mountain and Lushan Mountain and found many powerful evidences.
1933, Li Siguang gave a special academic lecture on Quaternary Ice Age in the Yangtze River Basin in geological society of china. After the meeting, Chinese and foreign scholars were specially invited to visit Lushan Mountain. Some foreign experts told Li Siguang privately that if these relics were found abroad, they would have been recognized as glacial relics.
Since then, Li Siguang has stepped up the investigation of Quaternary glaciers, and found a large number of remains in the Yangtze River basin and Huangshan Mountain, which finally overthrew the wrong conclusions of foreigners. Its research results have played a very important role in mastering groundwater hydrology and structure and developing construction.
4. Li Shizhen was a famous physician in ancient China, and was praised as a "medical sage" by later generations. He was a representative of the practical school that emphasized practice, examination and textual research in the late Ming and early Qing Dynasties. It took him nearly 40 years to compile the famous medical book Compendium of Materia Medica.
When Li Shizhen was young, he heard that there was a magical plant called Datura, and people couldn't help singing and dancing when they saw it. Li Shizhen had some trouble, and finally found this plant, and found nothing unusual at the moment.
In order to find out, he took Datura everywhere. Later, he personally took Datura stramonium and found that it had anesthetic and exciting effects, and a small amount could cure the disease. Too much, under the hint of others, you can really sing when you are told, and jump when you are told. Later, Datura stramonium was widely used to make anesthetic.
The story of Li Shizhen and Datura tells us that "theory comes from practice". He often tried to verify some legends and changed many superstitious ideas and practices of people at that time.
5. Yuan Longping has been engaged in hybrid rice research for half a century. He is not afraid of difficulties, willing to contribute, and has made great contributions to solving the problem of eating in China. Mr. Wang's outstanding achievements not only belong to China, but also affect the world.
Academician Yuan Longping is a pioneer of hybrid rice in China and a contemporary Shennong. For more than 50 years, we have been working hard and exploring tirelessly in the front line of agricultural scientific research, which has brought green hope and golden harvest for mankind to use scientific and technological means to overcome hunger. His outstanding achievements not only contributed to solving the problem of food and clothing for China people and ensuring national food security, but also set up a monument for world peace and social progress.
Yuan Longping's lofty moral character of loving the motherland, serving the people wholeheartedly and benefiting mankind, his ideological style of treating China's * * * production party wholeheartedly, his innovative spirit of advancing with the times and bravely climbing the peak, his strong will of perseverance and hard struggle, his noble sentiment of being strict with himself and indifferent to fame and fortune are examples for contemporary China people to learn and the spirit of the times called for in the new century.
Yuan Longping is a real cultivator. When he was a rural teacher, he had the courage to subvert the world authority; When he became famous in the world, he still only focused on Tian Chou. Indifferent to fame and fortune, a farmer spreads wisdom and gains wealth. His lifelong dream is to keep everyone away from hunger.
Extended data
Practice is the essence and foundation of social relations. Through practice, people can better understand the world. Analyzing the essence of social relations into social practice is a distinctive feature of Marx's social relations thought and the requirement of Marx's practical philosophy.
Marx believes that man is not only the main body engaged in social material production and human production, but also the main body of social communication. "Man is the essence and foundation of all human activities and all human relations." In reality, man's essence is free and conscious labor practice. Therefore, we can say that practice is the essence and foundation of all human social relations.
References:
Baidu Encyclopedia-Yuan Longping
Baidu encyclopedia-Edison