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Please give examples to illustrate that practice makes true knowledge.
Examples of true knowledge from practice are:

1, "Father of Hybrid Rice" Yuan Longping

A scientist who looks like a farmer but is burning with passion in his heart, an academician of China Academy of Engineering, discovered "male sterile plants" from the discovery of wild "natural hybrid rice" in the 1960s, which broke through the traditional classical theory that "self-pollinated crops such as rice have no heterosis", greatly enriched the theory of genetic breeding, opened the door for high yield and high harvest of hybrid rice kingdom, and found an effective way for human beings to overcome hunger by scientific and technological means, and was internationally praised.

Edison invented the electric light.

When Edison 12 years old, he was addicted to scientific experiments. After his tireless self-study and experiments, at the age of 16, he invented an automatic telegraph that sends signals every hour. Later, the automatic counting machine, the first practical typewriter, double and quadruple telegrams, automatic telephones and phonographs were invented one after another.

Edison was not satisfied with these inventions. 1in September, 878, Edison decided to attack the fortress of electric lighting. He read a lot of books about electric lighting and made up his mind to make cheap, durable, safe and convenient electric lights.

Sima Qian wrote historical records.

When Sima Qian wrote "History of Wei", he heard that Qin had led the Yellow River to flood the girder of Wei capital in order to destroy Wei. In order to find out this epic, he visited many places, went to the city wall, climbed up and down, looked for traces of that year, and patiently investigated with local old people. Finally, he got a lot of information and confirmed that there was a flood in Qin Dynasty, which was recorded in Historical Records.

4. Feng Zikai's "Selling Sheep"

One day, Mr. Feng suddenly had a brainwave and drew a cartoon entitled "Selling Sheep": a farmer took two Hu sheep and went to a mutton restaurant to sell them to the boss. After the painting, Mr. Feng felt very satisfied, so he took the cartoon to the mutton restaurant and wanted the boss and customers to enjoy it. Who knows, a farmer customer shook his head again and again and kept laughing.

Puzzled, Mr. Feng stepped forward and humbly asked him why he shook his head and laughed. The farmer said, pull an extra rope. Hearing this, Mr. Feng turned around and looked at his painting carefully. He was puzzled: two ropes are holding two sheep. Where is the rope? At this time, the farmer stood up and told him seriously that only one rope was enough to lead the sheep, no matter how many. At this point, Mr. Feng suddenly realized.

5. Zhu Kezhen, a famous meteorologist.

From the day I worked in meteorology, I will go outdoors to observe the weather and record it every day for decades. Until the day before his death, he wrote down the temperature of that day on his sickbed with trembling hands. Because he can't go outdoors to measure in person, it is based on the report of the Meteorological Bureau, so he marked the word "local newspaper" on the record. He has accumulated more than 40 meteorological diaries in his life, which is not only the first-hand material for his exploration of meteorological laws in China, but also the basis for his achievements.

6. In the Northern Song Dynasty, there was an archery expert named Chen Yaozi. One day, he was practicing archery at home, and nine times out of ten onlookers clapped their hands and said yes. Chen Yaozi himself was very proud, but an old man selling oil just nodded slightly. Chen Yaozi was very unhappy and asked, "Can you shoot an arrow? What do you think of my shooting? "

The old man simply replied, "I can't shoot an arrow." You can shoot it, but it's nothing mysterious, just technical. "Chen Yaozi asked the old man what skills, the old man put a copper coin in a gourd mouth filled with oil, scooped up a spoonful of oil, and poured it into the money's eyes. All the oil spoons were emptied, but no drop of oil was found outside the copper coin's eye.

The old man said to Chen Yaozi, "I don't have any secrets, but I am very skilled."

7. Dickens, a famous British writer, usually pays great attention to observing and experiencing life. No matter whether it is windy or rainy, he insists on going to the streets to observe and listen every day, recording the odds and ends of pedestrians and accumulating rich living materials.

That's it. He's in david copperfield? He gave a wonderful description of the dialogue between characters, and left a vivid description of the social background in A Tale of Two Cities, thus becoming a generation of English writers and achieving great success in his literary career.

8./kloc-At the age of 0/2, Edison was addicted to scientific experiments. After his tireless self-study and experiments, at the age of 16, he invented an automatic telegraph that sends signals every hour. Later, the automatic counting machine, the first practical typewriter, double and quadruple telegrams, automatic telephones and phonographs were invented one after another. Edison was not satisfied with these inventions. September, 1878,

Edison decided to attack the fortress of electric lighting. He read a lot of books about electric lighting and made up his mind to make cheap, durable, safe and convenient electric lights.

He started the experiment with an incandescent lamp. Put a small piece of heat-resistant thing in a glass bubble, and when the current burns it to a white-hot level, it will give off heat and glow. His first thought was charcoal, so he put a small piece of charcoal wire into a glass bubble, and the glass bubble broke as soon as it was electrified.

9. Dong Zhongshu devoted himself to research and worked tirelessly. Although there is a garden behind the study, he concentrated on reading and studying, and did not go into the garden to enjoy it for three years. Dong Zhongshu devoted himself to research and became a famous thinker in the Western Han Dynasty.

10. When Mei Lanfang was young, she went to learn drama from a teacher. The teacher said that he had a pair of dead fish eyes and was dull and dull. He was not cut out for drama at all and refused to accept him.

However, the lack of talent not only did not discourage Mei Lanfang, but made him more diligent. He feeds pigeons, looks up at the sky every day, and follows the flying pigeons with his eyes. He keeps goldfish and looks down at the bottom of the water every day, looking for shadows with his eyes following the wandering goldfish.

After years of unremitting efforts, Mei Lanfang's eyes have finally become like clear autumn water, sparkling and affectionate.