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Divided into fighter, interceptor. Fighter aircraft, the traditional fighter aircraft known to the public, is used to destroy enemy military aircraft, control the airspace, to control the air can avoid their own ground attack, but also conducive to their own side to attack the enemy ground. Because fighter aircraft may engage in aerial dogfight at any time, the requirements for maneuverability and movement performance are much higher than other types of aircraft.
Fighters are divided into two categories: fighter aircraft and interceptor aircraft. Fighter aircraft, that is, traditionThe main task of the fighter is to destroy enemy military aircraft, control the airspace, in order to master the air superiority, so as to avoid the attack on the ground target, and facilitate the attack on the enemy ground target. The fighter aircraft may engage in aerial dogfight when carrying out the task, so the requirements for maneuverability and motion performance are much higher than other types of aircraft.
Escort fighter aircraft, large bomb load, endurance, overload maneuvering performance. 4: Fighter-bombers (known as J-bombers in China), mainly used for offshore defense, intercepting and destroying low-altitude and high-value targets on the sea surface, or executing strategic weapons delivery missions. 5: Joint Fighter (multi-role combatThe aircraft has excellent performance and is suitable for most combat requirements and missions, such as the US F35.
Has the characteristics of strong firepower, fast speed, good mobility, etc. It is the main type of aircraft for aviation air combat, and can also be used to carry out ground attack tasks. Fighters are also known as fighters [1], and during World War II, they were called expulsion aircraft.
The main characteristics are: high speed, fast rise, high ceiling, good mobility, and strong combat firepower. Modern fighters are mostly single-seat, equipped with 1-2 jet engines, as well as navigation, communication, lifesaving and other equipment and fire control systems, electricityHistory of the School of Aeronautics and Astronautics '> History of the School of Aeronautics and Astronautics of Tsinghua University
1. After the founding of the People's Republic of China, in May 1951, when the first adjustment of colleges and departments of universities in China was made, the aeronautical departments of Xiamen University, Northwest Institute of Technology and Beiyang University were merged into the School of Aeronautical Engineering of Tsinghua University, the dean of which was Shen Yuan; At the same time, the school also built a new aviation hall.
2, College of Civil Engineering: The Department of Civil Engineering is one of the oldest departments of Tsinghua University. In 1926, the school established the Department of Engineering, including civil engineering, mechanical engineering and electrical engineering, which officially unveiled the history of the Department of Civil engineering. ringSchool of Environment: School of Environment originated from the School of Mechanical Engineering of the Department of Municipal Engineering established in 1928: School of Mechanical Engineering of Tsinghua University originated from the "Department of Mechanical Engineering" of the School of Engineering of Tsinghua University established in 1932. 3, the development of aviation discipline of Tsinghua University can be traced back to the 1930s, in the Department of mechanical engineering under the Institute of aviation, the establishment of the department of aviation in 1938, it has trained a large number of outstanding talents, for the establishment of China's aviation discipline and the development of aviation science and technology has made important contributions. In the adjustment of colleges and departments in the early 1950s, according to the unified arrangement of the state, the Department of Aviation moved out of Tsinghua University and participatedBeijing Aeronautical Institute was established.
4, Tsinghua School of Aeronautics and Astronautics has a long history. From 1934 to 1952, Tsinghua University set up the Aeronautical Engineering Group under the Department of Mechanical Engineering, which later developed into the Department of Aeronautical Engineering, which is the earliest aeronautical engineering specialty founded in China. From 1958 to 2004, Tsinghua University, under the initiative of Qian Xuesen and other scientists, established the Department of Engineering Mechanics and Mathematics to train talents related to mechanics and computational mathematics.
Life characteristics of OwlParrots are nocturnal animals, prefer to live alone, and have a well-established olfactory system. For example, they can distinguish food by smell when they are foraging; This habit is only found in one other species of parrot. Another very impressive quality of the kakapo is that it emits an aroma, which is often described by many people as musk, fruit or honey.
In addition to its strange habits, the kakapo is the only flightless bird in existence, and although its wings have not degraded, they are no longer enough to carry its massive body. In fact, the ancestors of the kakapo, like other parrots, were able to flyBut when their ancestors arrived on the island of New Zealand, due to the lack of competitors and predators, it ate more and more fat, and eventually could not fly anymore.
The living habits of parrots are: most parrots eat fruits, seeds, nuts, berries, shoots, etc. on trees or on the ground, and eat a small number of insects. Honey-sucking parrots feed on pollen, nectar and soft, juicy fruits. The feeding process of parrots is often completed with a powerful hooked beak and flexible antidactyl-shaped feet.
Habits and living conditions Most parrots are colorful and have a high vocal range, which is uniqueThe hooked beak makes it easy to identify these beautiful birds. They usually form small groups of mates and families, roost on forest branches, nest themselves or nest in tree holes, and eat berries, nuts, seeds, and nectar. There are exceptions, such as the mountain parakeet, a large, thick-feathered bird with a distinctive long, pointed beak that lives in thin thickets. Habits and behavior: Since they are unable to fly, kakapo usually walk in trees or on the ground. They are social animals and often congregate together. Habitat and distribution: Kakapo is endemic to New Zealand, mainly in New Zealand's South Island and Stewart IslandArea.1, the cat is the natural enemy of mice, the reason why it has a strong ability to catch mice. The first is because there is a special pair of eyes, the pupil can be contracted or enlarged with the strength of the light. Under strong light, the pupil shrinks into a thin slit; In the dark, the eyes are wide and round, even if it is the dark night that cannot see the five fingers, it can be clearlySee something, even the most cunning mouse can not escape. Its ears are flexible and can turn freely to where the sound is coming from, even the slightest sound can be recognized in time.
2, bedtime fairy tale for the baby 1 Bedtime fairy tale for the baby: A male mouse and a female mouse playing on the roof beam, accidentally, both fell down, into a big green jar. It was a blessing in disguise. There was a lot of rice in the big green jar. The two mice ate it at once. At first, the mouse is also worried about the owner, as soon as he is full, he jumps out of the tank to hide, and when he is hungry, he jumps into the tank to eat rice.
3. The mouse rolled his eyes, thought for a moment and said, "OK." So the cat held out his paw to the mouse. The mouse was saved and climbed up. When the cat was about to eat the mouse, the mouse said, "You'd better not eat me, I'm full of wine, if you eat me now, you'll get drunk, or you can bake me dry before you eat." So the cat took the mouse to the fire, and as it cooked, pressed its PAWS against the mouse's tail to keep it from running away.
4, summer fairy tales 1 In June, the sun is burning, really hot! Mother Mole installed an air conditioner in the room. Two mole molesThe mouse said: Mom, our house is really cool! The mouse came to play with the Mole. He pressed his nose against the window and shouted for us to go to the river and get the fish. A sunny morning, the cat and the mouse they two sworn brothers, the cat is the big brother, the mouse is the little brother. Their affection is so deep that they hold hands every day to store food, and if one of them is captured by someone else, the other has to save it. Today, Brother Cat and Brother Mouse go to buy a jar of oil. So they don't let anyone else eat them, they raise the reservoir.