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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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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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Recently, a scientific research team from Tokyo Metropolitan University in Japan discovered a new type of compound that can capture carbon dioxide directly from the environment and achieve the highest carbon capture efficiency so far of 99%, which is twice the efficiency of other
Japanese scientists develop new carbon capture system that can quickly and directly capture low-concentration carbon dioxide
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On July 6, the team of Professor Luan Sheng from the University of California, Berkeley, published a paper in Nature entitled. A receptor-channel trio conducts Ca.
Nature | Luan Sheng's team has made important breakthroughs in the fields of plant sexual reproduction and signal transduction
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The spring itself is elastic. After being compressed, the spring will have the tendency to return to its initial state, and therefore has elastic potential energy. We can think of it as the energy stored in the overall system of the spring. So the question is Question: If a compr
Put a compressed spring into strong acid. After the spring dissolves, where does the energy of the spring go?
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One laboratory announced its new establishment. From a common sense point of view, since it has been released to the public, it must not be a small laboratory or it must be responsible for some insignificant fringe projects; since a laboratory has been established and publicly an
What big project is this new laboratory doing?
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The male protagonist is a physics genius. He discovered the secret of time at the age of 28 and successfully invented a time machine. He is a sure winner in life! Just when this great god was about to solemnly announce his great discovery to the world, an accident happened! Of co
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There is a terrifying legend circulating deep in the dense forests of Xishuangbanna, Yunnan. There is a man-eating blanket-like monster in the Lancang River that sucks human blood. It is extremely terrifying. Once encountered, there is no possibility of survival. Is this true?
The "blood-sucking blanket" in the Xishuangbanna River drags animals into the water and eats them. What kind of animal is it?
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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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1983
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
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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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Taiwan's number one model Lin Chi-ling and Jerry Yan were rumored to be dating again last year. Lin Chi-ling was heartbroken and decided to let go. The relationship that has been entangled for 16 years is expected to come to an end. As soon as Lin Chiling bent down to take a bowl
Lin Chiling bends down and loses her breasts. Netizens are shocked: No underwear?
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The United States after World War II was definitely a place full of hormones. At that time, big breasts were everywhere. Both men and women have an almost crazy pursuit of "fullness". Do not believe? Let’s take a look at this ad from the 1950s: On the surface, it’s an ad about br
How are women’s breasts deceived into thinking they are “big”?
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But some women feel like they are going through a disaster when they menstruate, such as dysmenorrhea, or breast pain before menstruation. How to relieve breast pain before menstruation, these small methods are very effective 1. Massage the breasts. If women feel acupuncture-like
A few days before menstruation, do your "double peaks" always hurt? 4 tips to reduce discomfort
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In the 1950s, during the Second World War in the United States, countless popular celebrities wore triangular bras with proud breasts. "Plump" was the pursuit of all women.
This is how women’s breasts get enlarged.
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Recently, some netizens captured Jiang Mengjie appearing at the airport, wearing an orange velvet ultra-low-cut large V dress. Her pure face and snow-white skin on her chest are enviable!
Jiang Mengjie has a big "mole" on her chest, her snow-white breasts are exposed in a domineering manner, and she wears a black lace bra
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There is no season more beautiful than autumn. The tropical wind has just gone, but the cold air has not yet arrived. After wearing it all summer, you can finally take it off and wear some exciting and fun outfits in the golden autumn. Among the exciting outfits, see-through is d
Autumn wind blows, see-through beauty, BABY’s see-through underwear, Zhang Xinyu’s nude color is so beautiful
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