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The metallurgical industry in the Qing Dynasty exceeded the level of the mid-Ming Dynasty. According to statistics from the Geological Survey, the national output of iron smelting by the old method was more than 170,000 tons in 1919, and the output of iron in the late Qing Dynast
Cold Knowledge of the Qing Dynasty - Metallurgical and Machinery Manufacturing Achievements of the Qing Dynasty
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Rats are a very disgusting animal. Many people eat the food they just bought at home before they even open it and taste it. People usually gnash their teeth when talking about this animal. From ancient times to the present, people have used various methods to try to eliminate the
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Researchers such as Gao Fu from the Institute of Microbiology, Chinese Academy of Sciences, have just published an article in NEJM introducing the neutralizing ability of volunteer sera with different vaccination programs against Omicron subtypes. Under similar conditions, two do
Confused about how to get vaccinated? Pay attention to the latest NEJM work such as Gao Fu
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Researchers including Daohua Jiang from the Institute of Physics, Chinese Academy of Sciences, and William Catterall and Ning Zheng from the University of Washington analyzed the structure of the open-state cardiac sodium channel (NaV1.5) and analyzed its working principle (1).
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Every spring and summer is the time when most young birds learn survival skills such as leaving the nest to fly and foraging for food. Due to rain, strong winds, physical strength and other reasons, many young birds will accidentally fall from the trees when learning to fly. . Wh
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my country's first artificially bred rabbit cat turns one year old. On July 7, the Internet celebrity "Elder Snake" in Xining Wildlife Park is one year and two months old. "She" is my country's first artificially bred rabbit cat. "She" "It not only fills the gap in the successful
Xining is awesome! For the first time, China achieved
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[Source: Shunyi Ecological Environment] Ubiquitous plastic products have facilitated people's lives, but the resulting plastic waste has caused a lot of pollution to the ecological environment...
"Popular Science" "Degradable Plastics" Revealed
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We’ve seen blue skies on sunny days, black skies on rainy days, gray skies on cloudy days…but what about green skies? It seems that it is only possible in science fiction movies, or on some alien planet beyond the earth. Will there be green skies on the earth we live on? The worl
Is the green sky suddenly appearing in the United States an ominous sign?
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Chinese people have a special emotion for the moon. Chang'e flies to the moon, the Moon Rabbit makes medicine, we are strangers in a foreign land, but we still share the beauty of the moon. The moon represents my heart. Throughout the ages, many thoughts and emotions have been pl
Why do American experts want to blow up the moon and leave the earth without seasons? What is their purpose?
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Protecting wild animals is everyone’s responsibility. The reporter learned from the Guangdong Coast Guard Bureau on July 7 that recently, law enforcement officers from the Nan'ao Work Station of the Guangdong Shantou Coast Guard Rescued a pangolin, a national first-level wild pro
Meet a "cute" on the road! Coast Guard law enforcement officers warmly rescue pangolins, national first-level protected animals
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Pictured above is Physarum polycephalum, a protist, specifically a slime mold. The term "slime mold" does not refer to a specific single group, but is a broad term referring to several types of eukaryotes that behave similarly. Regardless, they possess intelligence, although it l
Intelligent slime mold
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01. Nostalgia is a spaceship heading to Mars. ——Douyou 02. Since childhood, I have been taking care of the stars of all generations alone. ——Bai Helin's "Loneliness" 03. The stars should laugh, the universe is a remote place anyway. ——Pasternak 04. All my desires and contemplatio
Golden sentence#星星——All my desires and contemplations are the slowly exhaled air currents of this universe.
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Today, an insight into the vision of a once young cosmic artist shows the dust continuum and molecular lines of carbon monoxide and water seen in the pair of SPT0311-58 galaxies. (Image source: ALMA (ESO/NAOJ/NRAO)/S.
Water was discovered in ancient galaxies, which surprised astronomers. What happened?
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Text/Picture Yangcheng Evening News all-media reporter Wen Cong has completed about 700 experimental projects, filling many gaps in my country's scientific research field... Next month, the China Spallation Neutron Source (CSNS) will have been in operation for four years. With th
Filling in many scientific research gaps! The China Spallation Neutron Source will be in operation for four years丨The party flag is flying high at the grassroots level
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In fact, we are not unfamiliar with the term mycotoxins. They generally exist in grains. The detection of mycotoxins can be carried out on-site. When choosing instruments for testing, we must choose brands with good quality.
Introduction to applicable industries of mycotoxin detectors
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How should we choose testing instruments? When choosing together, we should focus on the quality of the product. Speaking of instruments, online residual chlorine analyzers have a wide range of uses. They are not only very accurate in detecting residual chlorine content, but can
Instructions for using online residual chlorine analyzer
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The sub-sectors with the most obvious negative contrast in growth rates are environmental protection equipment, textile and clothing equipment, construction machinery, rail transit equipment, etc. Among them, the contrast in the weighted sector construction machinery is particula
Machinery equipment industry research and investment strategy report: Breaking through the fog and taking advantage of the rise of Chinese manufacturing
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There are many top players in "Slam Dunk", among which Sanno's Eiji Sawabita is recognized as the number one high school student in the country. There is no problem with this. Finally, what are your thoughts on the above four groups of players who are most easily compared to each
The four groups of players in "Slam Dunk" that are easiest to fight with each other, Amu and Fukatsu, Mitsui and A Shen
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As shown in Figure 1, let's first talk about the topspin ball. The ball rotates counterclockwise, driving the air around the ball to form an airflow with a speed of v1; the ball moves forward, and the air has a backward airflow with a speed of v2 relative to the ball.
Don’t think that you know everything if you play well. You may not know these things (1)
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The author Takehiko Inoue believes that according to the setting, the strongest point guard in the plot year is Makoto Shinichi, so I have analyzed the comparison between the two many times before.
Slam Dunk Master: Comprehensive analysis of the technical characteristics of Fujima Kenji and Fukatsu Kazunari, Fujima may not lose
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In the third round of the U23 Asian Cup group stage on January 15, the Chinese U23 men's football team lost 1-2 to Qatar at home. The U23 men's football team ranked third in the group was eliminated.
The sorrow of Chinese football: none of the five giants in Asia are Chinese, and the only one retires
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Between six and seven thousand years ago and three to four thousand years ago, great changes took place on the earth where humans live - the Mesopotamia in West Asia, the Nile River Basin in North Africa, the Indus River Basin and Ganges River Basin in South Asia, and the Yellow
A minimalist history of Chinese civilization that makes you suddenly enlightened after reading it.
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