Which one do you think is usually 8? If a handwritten newspaper is published.
You don't have to care what it is, as long as it is related to science.
Good typesetting is enough, mainly depending on the overall effect.
Why do you get appendicitis?
Appendicitis is a very common acute abdomen. The appendix, also known as the worm-like process, is a slender blind tube in the cecum. The length and position of the human appendix are different, generally 7~9 cm long, located in the iliac fossa of the right lower abdomen. The proximal end of the appendix is connected with the cecum, and the end is blind. The submucosa of the appendix is rich in lymphoid tissue, which often proliferates, making the appendix cavity narrow or obstructive; Feces, stones and parasites often remain in the appendix cavity, which can lead to poor drainage of the contents of the appendix cavity, especially the appendix artery is the terminal artery and the blood supply is poor. Once the blood circulation disorder is caused for some reason, it is easy to cause necrosis and inflammation of the appendix. Appendicitis can be divided into acute and chronic types.
Interesting scientific knowledge:
1 Why do you see lightning first and then hear thunder? Light waves travel faster in air than sound speed.
Who was the first Olympic champion in China? (Xu Haifeng)
Who invented glasses? (Luigi, bacon)
Why does the bicycle move? (Bicycle tires rub against the ground)
Whose title is the following? (Poet Fairy-Li Bai, Poet Sage-Du Fu, Shi Gui-Li He Landscape Poet-Meng Haoran, Pastoral Poet-Tao Yuanming)
What does the light of June revolve around? How long is a cycle? (Earth) (24 hours)
What are the three plains in China? (Northeast Plain, North China Plain, Middle and Lower Yangtze Plain)
How many earthquakes occur on the earth every year? (about 5 million times)
What is the smallest and coldest star? (Pluto)
10 What is the thickness of the earth? (atmosphere)
1 1 Why is there a black box on the plane? It is used to record all kinds of situations on the plane when the accident happened and help people understand the cause of the accident.
12 What are the customs during the Spring Festival? (Sweep the house, set off explosions, post Spring Festival couplets, eat New Year's Eve, etc. )
13 What animals can predict earthquakes? Cattle, horses, donkeys, rabbits, chickens, dogs, snakes, rats, dogs, cats, swallows, eagles, etc. )
14 What plants bloom first and then shed leaves? (Forsythia suspensa, Winter jasmine, Chimonanthus praecox, peach tree, pear tree)
15 How do bees make hives? Every worker bee has a wax gland at the waist, which can secrete wax. This wax becomes soft and tough after chewing in the mouth, and can be used to build a honeycomb.
Why is the 16 medicine bottle so light? Because light color can reflect light, dark color absorbs more light in the sun, and drugs are easy to deteriorate. )
17 who invented the steam engine? (Watts)
18 which dinosaur is the hardest? (Stegosaurus)
19 what is the blood of the earth? (magma)
What is the skeleton of the earth? (rock)
2 1 Why don't you watch the welding sparks? (contains ultraviolet rays harmful to eyes)
Why can't you turn off the lights and watch TV? The screen and image of the TV set are relatively small. In the dark, the vision should be highly concentrated and expanded, and it is particularly sensitive to the strong reflection of light on the TV screen, which will stimulate the eyes and reduce vision. )
Who are the top ten marshals in People's Republic of China (PRC)? (Zhu De, Peng, He Long, Chen Yi, Liu Bocheng, Luo Ronghuan, Xu, Nie, Lin Biao, Ye Jianying)
Write down the dynasties in ancient China in order. (Xia, Shang, Zhou, Qin, Han, Sui, Tang, Song, Yuan, Ming and Qing)
Why don't rabbits need water? Because there is a lot of water in the rabbit's staple food, it is enough for the body. If there is too much water in the intestine, you will get gastroenteritis. But rabbits can drink water when they are short of water.
What is a meteor? (refers to the light trace produced when very small solids or dust in space break into the earth's atmosphere)
Who is an outstanding astronomer in the history of China? (Rolling)
Who is the inventor of the battery? (Volts)
Where is Mount Vesuvius? (Italy)
1 who are the two astronauts who arrived at the moon? (Armstrong and Aldrin)
3 1 Which province and city is Mount Tai in? (Taishan City, Shandong Province)
Where is the Amazon River? (Brazil)
Where is the Irrawaddy River? (Myanmar)
What are the five most precious gems in the world? (Opal, Emerald, Diamond, Sapphire, Ruby)
What was the name of the ancestor of the fish? (amphioxus)
What is the name of the most poisonous spider in the world? (wolf found)
What are the names of the animals that glow in the world? (Rays and eels)
Where does chocolate come from? It is made from seeds in the fruit of the cocoa tree.
Why are there "tendons" in leaves ("tendons" can receive sunlight and let roots absorb water for leaves in Yuzryha)?
How many muscles do 40 people have? (One * * * has more than 600 muscles)
4 1 Will the wood float on the water? No, there is a kind of "steel tree" that won't float on the water.
What is the capital of France? (Paris)
What is the capital of England? Answer: London.
What is the capital of Japan? Answer: Tokyo.
What is the capital of Italy? Answer: Rome.
What is the capital of the United States? Answer: new york.
What are the ancestors of birds? Answer: Archaeopteryx.
What are the four seafood products in China? Answer: large yellow croaker, small yellow croaker, hairtail, squid.
What is the largest mammal? Answer: blue whale.
What is the largest amphibian? Answer: giant salamander.
5 1 What is the shortest-lived insect? Answer: Mayflies.
What was the earliest crop? Answer: wheat.
What are the four major oil crops in China? Answer: Rape, soybean, peanut, sesame.
What are the three famous wines in China? Answer: tea, cocoa, coffee.
What are the four biggest fruits in the world? Answer: apples, grapes, oranges and bananas.
What is the national flower of Japan? Answer: cherry blossoms.
Where is tulip the national flower? Answer: The Netherlands.
What tree eats people? Answer: Dubai.
What is the biggest flower? Answer: Dawanghua.
Who got rid of China's poor oil hat? Answer: Li Siguang.
Legend has it that the bird of paradise is a kind of god bird. It lives in "heaven in heaven" and eats nectar. It can make waves of charming music when flying. So it is also called bird of paradise, sunbird, wind bird and fog bird. Papua New Guinea, a South Pacific island country, is the main habitat of the world-famous birds of paradise. According to statistics, there are more than 40 species of birds of paradise in the world, including 30 species in Papua New Guinea, among which the most famous birds are bluebird, bird of paradise foot and bird of paradise king. The bird of paradise has a golden green head and beautiful feathers, especially a pair of long tail feathers, which are even more charming and dazzling. When birds of paradise courtship, they will raise their heads, bow their backs and erect golden fluff on both sides of their bodies; Or hang upside down on the branches and shake off brocade-like feathers to attract females. A "bird of paradise without feet" doesn't really have no feet, but its feet are short and it is hidden in long feathers when flying, so people can't see it. The tail of a bird of paradise without feet is two or three times longer than its body, and it is also called a long-tailed bird of paradise. The bird of paradise is only about 20 cm, much smaller than other birds of paradise. It is faithful to love. Once you lose your partner, another bird will starve to death. The bird of paradise is very lonely and doesn't want to live with other birds of paradise. When other birds of paradise migrate, it will also fly into the sky and act as a "guide" in the air. The bird of paradise is a symbol of Papua New Guinea, and even its image can be seen on national flags, national emblems, passenger airliners and various souvenirs.
The story of scientists
Every scientist fails sometimes. Now, I will look at the story of scientists.
Story 1:
Boyle's skeptical chemist
Boyle was born in an aristocratic family in Ireland on1October 25th. My father is an earl and his family is very rich. He is the youngest of the fourteen brothers. Boyle was not particularly smart when he was a child, and he stuttered a little. He doesn't like lively games very much, but he is studious and likes reading and thinking quietly. Received a good education since childhood, and studied in Europe from 1639 to 1644. During this period, he read many natural science books, including the famous book Dialogue between Two World Systems by astronomer and physicist Galileo. This book left a deep impression on him. His later masterpiece The Doubtful Chemist was based on this book.
Due to the war, his father died and his family came down. He returned to China to live in London with his sister in 1644. I started studying medicine and agriculture there. I came into contact with a lot of chemical knowledge and experiments in my study, and soon became a well-trained chemical experimenter and creative theorist. During this period, he organized a scientific society with many scholars and held a weekly seminar, mainly discussing the latest development of natural science and the problems encountered in the laboratory. Boyle called this organization an "invisible university". This society is the predecessor of the famous "Royal Society", and its purpose is to promote the development of natural science. Boyle is an important member of the association. Boyle moved to Oxford on 1654 because the branch of the society was located in Oxford. In Oxford, he set up a well-equipped laboratory and hired some talented scholars as assistants to lead them in various scientific research. Many of his scientific research achievements were obtained here. The epoch-making masterpiece "Skeptical Chemist" is written here. In the genre of dialogue, this book writes four philosophers arguing together. They are skeptical chemists, bardic chemists, medical chemists and philosophers. Bard chemists represent Aristotle's view of "four elements", medical chemists represent the view of "three elements", and philosophers remain neutral in the debate. Here, skeptical chemists have no fear to challenge all kinds of authoritative traditional theories in history, refuting many old ideas with vivid and powerful arguments and putting forward new ones. This book is widely circulated in continental Europe.
Boyle attaches great importance to experimental research. He believes that only experiment and observation are the basis of scientific thinking. He always clarifies his views through rigorous and scientific experiments. In physics, he studied the color of light, the elasticity of vacuum and air, and summarized Boyle's gas law. In chemistry, his research on acid, alkali and indicator, and his discussion on the qualitative test method of salt are quite effective. He was the first chemist to use the juices of various natural plants as indicators. He invented litmus test solution and litmus test paper. He was also the first chemist to give a clear definition of acid and alkali, and divided substances into three categories: acid, alkali and salt. He created many qualitative methods to test salt, such as using copper salt solution to be blue, adding ammonia solution to become dark blue (copper ions and enough ammonia water form copper-ammonia complex ions) to test copper salt; The white precipitate produced by mixing hydrochloric acid and silver nitrate solution is used to test silver salt and hydrochloric acid. Boyle's invention is full of long-term vitality, so that we still often use these oldest methods today. Boyle has also done many experiments in determining the composition and purity of substances, and studying the similarities and differences of substances. A brief review of the history of mineral water experimental research published by 1685 describes a set of methods to identify substances and becomes a pioneer in qualitative analysis.
1668, due to the death of his brother-in-law, he moved to London to live with his sister, and set up a laboratory in his backyard to continue his experimental work. Boyle's work in his later years mainly focused on the study of phosphorus. 1670, Boyle suffered a stroke due to fatigue, and his physical condition was good and bad. When he can't do research in the laboratory, he devotes himself to sorting out the knowledge gained from practice and reasoning for many years. As long as he feels a little light, he goes to the laboratory to do his experiments or write papers for fun. 1680, he was elected president of the royal society, but he refused to accept this honor. Although he was born into a noble family, he devoted his life to scientific research and life. He never married and devoted his life to exploring natural science. 169 165438 On February 30th, the scientist who laid the foundation of chemical science in17th century died in London. Engels once gave him the highest evaluation: "Boyle identified chemistry as science."
Story 2:
Priestley —— Father of Gas Chemistry
Priestley 1733 was born in Leeds, England on March 13, and was raised by poor relatives. He entered the seminary on 175. After graduation, he spent most of his time as a priest, and chemistry was his hobby. He has many works in chemistry, electricity, natural philosophy and theology. He wrote many smug theological works, but it was his scientific works that made him immortal. 1764, when he was 3 1 years old, he wrote the history of electricity. At that time, it was a famous book. Because of its publication, he was elected as a member of the Royal Society at 1766.
1722, when he was 39 years old, he wrote a history of optics. It is also a masterpiece of 18 century. At that time, on the one hand, he served as a priest in Leeds, on the other hand, he began to engage in chemical research. His research on gases is quite effective. He used the generated hydrogen to study the effect of this gas on various metal oxides. In the same year, priestley also burned charcoal in a closed container and found that it could turn one-fifth of the air into carbonic acid gas. After being absorbed by lime water, the remaining gas does not help to burn or breathe. Because he believed in phlogiston, he called this residual gas "air saturated with phlogiston". Obviously, he used charcoal combustion and alkali absorption to remove oxygen and carbonic acid gas from the air and make nitrogen. In addition, he discovered nitric oxide and used it to analyze air. Hydrogen chloride, ammonia, sulfurous acid gas (carbon dioxide), nitrous oxide, oxygen and other gases have also been found or studied. 1766, his experiment and observation of several gases was published in three volumes. This book describes in detail the preparation or properties of various gases. Because of his outstanding achievements in gas research, he is called "the father of gas chemistry".
The most important thing in gas research is the discovery of oxygen. 1774, priestley put mercury soot (mercury oxide) into a glass dish and heated it with a condenser, and found that it quickly decomposed into gas. He thinks that the air has been released, so he collects the generated gas by gas collection and studies it. He found that the gas made the candle burn more brightly, and he felt relaxed and comfortable breathing. He made oxygen, and proved through experiments that oxygen has the properties of combustion-supporting and breathing. However, because he is a stubborn believer in phlogiston, he still thinks that air is a single gas, so he also calls this gas "dephosphorized air". The difference between its nature and the "air saturated with phlogiston" (nitrogen) discovered earlier is only the difference in phlogiston content, so its combustion-supporting ability is also different. In the same year, he visited Europe, exchanged many chemical views with lavoisier in Paris, and told lavoisier about the experiment of decomposing mercury and silver ash with condenser, which benefited lavoisier a lot. Lavoisier just repeated priestley's experiment about oxygen, and linked it with a large number of accurate experimental materials, made scientific analysis and judgment, and revealed the real connection between combustion and air. But it was not until 1783 that lavoisier's theory of combustion oxidation was generally considered to be correct. Priestley still refused to accept lavoisier's explanation, insisted on the wrong phlogiston theory, and wrote many articles against lavoisier's opinion. This is an interesting fact in the history of chemistry. A person who discovered oxygen became a person who opposed the theory of oxidation. However, priestley found that oxygen is an important factor in the vigorous development of chemistry. So chemists all over the world still respect Priestley.
179 1 year, he sympathized with the French revolution and made propaganda speeches for the revolution many times, but he was persecuted by some people, his home was copied, and books and experimental equipment were set on fire. He escaped alone and took refuge in London, but it was difficult for him to live in London for a long time. At the age of 6 1, he had to immigrate to the United States. Continue to engage in scientific research in the United States. 1804 is dead. People in Britain and America respect him very much, and England has a full-length statue of him. In the United States, the house where he lived has been built into a memorial hall, and the priestley Medal named after him has become the highest honor in American chemistry.
Story 3:
Madame Curie
Marie Curie (Madame Curie) was a French-born Polish physicist and chemist.
1898, French physicist AntoineHenriBecquerel discovered that uranium-containing substances can emit a mysterious ray, but failed to reveal the mystery of this ray. Mary and her husband Pierrecurie)*** * * both undertook the work of studying this kind of radiation. They separated and analyzed pitchblende under extremely difficult conditions, and finally found two new elements in July 1898 and February 12.
To commemorate her native Poland, she named one element polonium and the other element radium, which means "radioactive substance". In order to prepare pure radium compounds, it took Madame Curie another four years (MarieCuI7e, 1867- 1934) to extract1o0mg of radium chloride from several tons of pitchblende residue, and the relative atomic mass of radium was preliminarily determined to be 225. This simple figure embodies the hard work and sweat of the Curie couple.
1In June, 903, Madame Curie took "Research on Radioactive Substances" as her doctoral thesis and obtained a doctorate in physics from the University of Paris. In June165438+1October of the same year, the Curies were awarded the David Gold Medal by the Royal Society. In February 65438, together with Bekkerel, they won the 1903 Nobel Prize in Physics.
1906, pierre curie died in a car accident. This heavy blow did not make her give up her persistent pursuit. She fought back her grief and redoubled her efforts to complete their beloved scientific career. She continued her husband's lecture at the University of Paris and became the first female professor at the university. 19 10, her famous book on radioactivity was published. She cooperated with Mou and others to analyze pure metal radium and measure its properties. She also measured the half-lives of oxygen and other elements and published a series of important works on radioactivity. In view of the above great achievements, she won the Nobel Prize in chemistry at 19 1 1, becoming the first great scientist to win the Nobel Prize twice in history.
The founder of radiation science, who suffered from scientific hardships, died unfortunately on July 4, 1934 on/kloc-0 because of years of efforts. She devoted her glorious life to the scientific cause of mankind.