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In 1676, Dutch scientist Antoni van Leeuwenhoek used a homemade microscope to observe bacteria for the first time and revealed the existence of microorganisms to the world. Therefore, he is also known as "the father of protozoology and bacteriology." father".
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Acid and alkali resistant magnetic pumps can transport harsh fluid media such as highly toxic, flammable and explosive, high power, high temperature, high pressure and strong corrosion resistance. Because of its performance advantages of no shaft seal and no leakage, in recent ye
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In 1994, Bill Gates spent about $30 million to purchase Leonardo da Vinci's "Code Leicester," a famous manuscript that records Leonardo da Vinci's work on astronomy, mechanics, botany, mathematics, and Sketches and ideas for subjects such as architecture. Why spend so much money
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The perigee of Mars is 55 million kilometers, and the apogee is a full 400 million kilometers. This is a planet that is very far away from us most of the time. Therefore, every time humans launch a probe, they have to choose the day carefully to prevent missing the most important
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A study published by Columbia University researchers in the journal Nature on the 5th showed that the latest Omicron subtypes, such as BA.4 and BA.5, which have caused a surge in new infections around the world, are more likely to evade vaccines than previous variants. and most a
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From the launch of China's first artificial earth satellite "Dongfanghong-1" in 1970, to the successful launch of China's first manned spacecraft Shenzhou 5 in 2003, to the Mars exploration journey of the "Tianwen-1" probe , until the Shenzhou 13 manned spacecraft returned succes
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This variant evolved from the BA.2 variant of the Omicron strain and is called a "second-generation variant". It has many "unusual" mutations and may be able to break through the immunity built by existing vaccines and strain infections. barrier, and the infection speed is relati
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Different from other creatures, our ancestors chose a very unique evolutionary route, with the brain as the core. Because of this choice, humans are now the "rulers" of the earth and have absolute dominance. Unless all other creatures on the earth unite to attack humans, then eve
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After death, due to the termination of the life process, the putrefactive bacteria that were parasitic in the human body during life lost the control of the human immune system and grew and multiplied crazily.
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Geometrically complex parts are manufactured using wax casting. However, high-quality castings are not always ensured when using this method: defects often form on the product surface. Chemists from the Perm Polytechnic University suggested a technique that would avoid irregulari
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An international team of astrophysicists studied the emergence of ion holes in Earth's magnetotail and assessed their impact on space weather. They found that ion holes propagate obliquely toward the local magnetic field. The results of this study will contribute to a better unde
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China's first independently developed and manufactured 10,000-meter drilling rig, the "Crust No. 1" 10,000-meter continental scientific drilling rig, is the pride of the entire Chinese people. "Crust No. 1" is a 10,000-meter continental scientific drilling rig independently devel
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In the hot summer, do you want to "cool off" or even miss the cold winter? Dog sleds are actually mostly used in the Arctic or around the Arctic, because there is snow all year round, making it difficult for vehicles or horses to move. Therefore, sled dogs with snow wolf genes ha
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Metals such as copper, silver, aluminum, and iron have strong electrical conductivity and are called conductors. Plastic, glass, rubber, porcelain, etc. are almost non-conductive and are called insulators. There is also a type of substance whose conductivity is between that of a
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Viruses can change the host's odor to attract mosquitoes: we know that mosquitoes (mosquitoes) are the deadliest animals in the world. Mosquitoes transmit diseases and are vectors of viruses and pathogens.
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The dust of the "most intense" South Korean election in history has settled. Yin Xiyue, who once asked China to dismantle border radars and clamored for additional deployment of the "THAAD" anti-missile system, was elected president. Less than 12 hours after he was elected presid
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At a time when U.S. oil prices are soaring, a conversation between CNN and Biden's economic adviser Brian Deese sparked outrage in the United States. Some American netizens said that the translated meaning of this sentence is: "In order to achieve our goals, we have to sacrifice
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U.S. President Joseph Biden called on domestic refiners to increase gasoline and diesel production on the 15th. The reason is that since Russia launched special military operations against Ukraine in late February, profits of U.S. oil companies have tripled, but U.S. consumers ar
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Abstract: Yide Futures analyst Chen Tong told a reporter from China Times that crude oil still maintains a bullish trend. Although the financial market is trading recession logic, the trading recession does not mean that the real economy is in a recession cycle.
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Mother's hand-made noodles - There is an inconspicuous noodle shop at the entrance of Wenhongling Community. It has been selling only hand-made noodles with more than ten kinds of braised noodles in different flavors. The business is extremely prosperous. The hot and fragrant big
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Raising a baby is like having a money shredder installed in your home, with food, drinks, toiletries, clothes, shoes, toys, lots of things to buy after becoming a mother, and many pitfalls. Summarizing past experience, we share 14 maternal and infant products worth planting, from
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