Currently, a total of 12 lucky people in the world have landed on the surface of the moon, and they are all American astronauts. However, humans in other countries have so far failed to achieve the feat of landing on the moon. This means that no one from any other country than the Americans has ever set foot on this mysterious celestial body. ThisHistoryThe milestone will forever remain in the name of the American astronauts, and it will be an important page in the exploration of the universe.
Expansion: The U.S. is globalAerospace science and technologyOne of the leaders in the field. They founded the National Aeronautics and Space Administration (NASA) to advance the development and exploration of space science. In addition, the United States has previously planned to carry out a project called"Apollo program"This is not only a breakthrough scientific practice, but also the pinnacle of human exploration of space.
Egg shellsThe thickness of the chicken is thickCalcium carbonateThe content is closely related. Calcium carbonateis the compositionEgg shellsOne of the main ingredients is also impartingEgg shellsAn important element of hardness and protection. If a chicken is in the bodyCalcium carbonateThe higher the content, then the productionEgg shellsIt will be relatively thick. On the contrary, ifCalcium carbonateThe content is lower, thenEgg shellswill be thinner.
Extensions:Calcium carbonateis a kind of ubiquitous in natureMinerals, commonly found in shells,Corals, mussels and other organisms. Egg shellsThe thickness of the egg not only affects the protective performance of the egg, but also related to the breeding environmentFeedFactors such as quality, breed of chicken, etc. Therefore, farmers need to pay attention to reasonable regulation when raising chickensFeedingredients to raiseEgg shellsquality.
The Vatican is the smallest country in the world, and what makes it unique is thatHomelandThe area is equal to China's famous Tiananmen Square. The Vatican isThe Popeof the official residence andCatholicof the headquarters of the location, so it has independencePoliticsStatus. AlthoughHomelandThe area is small, but the Vatican has a higher onePopulation densityand has an important influence around the world.
Expansion: The Vatican is located within the city of Rome and is surrounded by ancient Roman walls. Despite its small size, the Vatican is home to many fine buildings andCultureHeritage, including St. Peter's Basilica, VaticanMuseumsWait. Every year, millions of tourists flock to the Vatican to explore its religion andCultureand at the same time feel its uniquenessHistoryCharm.
In the classic masterpiece ".Journey to the West", relatedTang SengThe rumors of meat are puzzling. According to the records,Tang SengHis mother once accidentally bit off one of his toes when he was born, and it can be said that he was the only one who "ate".Tang Sengof people. On the other hand, it is controversial to believe that the sand monk ate the scriptures of the first nine generations, and notTang SengMyself. These two views have so far been inconclusive and have become a puzzle that raises people's minds.
Extensions:Journey to the WestIt is ancient ChinaFour famous booksOne of them, known all over the world for its magical plot and profound allegorical meaning. InMedium,Tang SengLeadingMonkey King, Zhu Bajie and Sha Seng embarked on the road of learning scriptures together, and after many hardships, they finally obtained the true scriptures. This story is both imaginative and deeply philosophical, and it is loved by readers.
GiraffescalledAnimaliaof giants, their physical characteristics are unique. And what complements their special stature are their horns. GiraffesThe horns are very special and have a special name, ie"GiraffesCorners"。This kind of horn inAnimaliais unique and is only used to describeGiraffesof the horns.
Extensions:GiraffesThe horns are actually made of bones andRhinoceroscomposition. They can be used for the most basic survival needs, such as fighting for mates and territory, and can also be used for self-defense, which is used against predators. GiraffesThe unique and attractive shape of the horns has become the inspiration for many people's art and design.
Yao, Shun, Yu and other ancient emperors of the Zen system isHistoryA topic of long-standing controversy in the academic community. According to the traditional interpretation, Yao Chan was given to Shun, and Shun Chan was given to Yu, and this system was regarded as a wise choice for the sages, ensuring peace and order in the world. However, withHistoryAs the research deepened, some scholars began to question this explanation, arguing that the system of Zen concessions was not established in ancient times.
Expansion: Yao, Shun, and Yu are revered as ancient saints, which they representPoliticsThe concept and method of governance have become classics of governance in later generations. The Chan system was regarded as a way to stabilize power and inherit governance, and it also played a certain role in restraining the succession of emperors in ancient China. However,HistoryWhether it is true or not needs to be comprehensively researched before a conclusion can be drawn.
A woman experiences about five days a month with her aunt, which translates to 60 days in a year. Assuming that she has a total of 40 years from the beginning of her period to menopause, she will experience a total of 2,400 days of her great aunt in her life. This is a surprising number and one that reflects an important part of a woman's menstrual cycle.
Expansion: A woman's menstrual cycle is a physiological characteristic that marks the circulation and renewal of a woman's life force. The Great Aunt is not only a manifestation of fertility, but also a female bodyHealthAn indicator of the situation. Understanding women's physiological characteristics and cycles is important for women themselveslifewithHealth managementVery important.
Peking duckIt is one of the famous traditional dishes in China, but in fact its origin is not thereBeijing, but originated in Nanjing. However, compared to the development in Nanjing,Peking duckInBeijingBut it has been better developed and promoted. Nowadays,Peking duckIt has become ChinaGastronomyIt has attracted countless domestic and foreign tourists to taste it.
Extensions:Peking duckIt is famous for its unique roasting process and taste. It uses tender duck meat, which is roasted in the oven to make it crispy and juicy. At the same time, withRoast duckSpecialty toppings such as toppings and crepes add to the dishGastronomyflavor. Savor an authentic onePeking duck, an unforgettable taste treat.
When we witness the lightning streaking in the sky, what we actually see isHigh voltageof release. Each lightning bolt can reach hundreds of millions of volts. Lightning is a large-scale charge release phenomenon that usually occurs between clouds and the ground. This powerful release of electrical energy results in a beautiful and spectacular natural landscape.
Extension: Lightning is formed due to the electrostatic effect of water carrying charge within the clouds, which in turn leads to rapid electrical discharges between the clouds and the ground. Lightning releasedHigh voltageIt can instantly raise the temperature of the air to tens of thousands of degrees Celsius, causing sound and light, but also bringing a certain amount of danger. Therefore, during thunderstorms, people need to pay attention to safety and stay away from high places and metal objects.
PsychoticPersonality**And it's not just one person'sPersonality**It's as simple as two, and it can be a dozen different personalities. Personality**It is a mental illness in which patients exhibit different personality traits in different situations and are not even connected to each other. This disease to the patientlifeand socializing brought a lot of trouble.
Extensions:Personality**It is a very complex mental illness that is often accompanied by symptoms such as memory loss, mood swings, and auditory hallucinations. Patients often develop multiple personalities that switch between different moods and circumstances. This disease requires a medical professional to diagnose and **, including drugs ** and cognitive-behavior**. Understanding and support is important for patients and families.