Give me some knowledge about music, literature, history, popular science, common sense of life, physics, and ancient poetry. I want a lot. If you do well, I will give you extra points.

Ancient poem:

When a young boy leaves home and his elder brother returns home, his local pronunciation remains unchanged and his hair on his temples fades away. When children see each other but don't recognize each other, they laugh and ask where the guest comes from. (He Zhizhang's "Book of Returning to Hometown")

The young man does not know the feeling of sorrow and falls in love with the upper floors. Falling in love with the upper floors, I force myself to express my sorrow in order to compose new words. (Xin Qiji's "Chou Nuer·Shubo Mountain Road Middle Wall")

The eldest son is hoeing beans to the east of the stream, and the middle son is weaving a chicken coop. His favorite child is rogue, lying at the head of the stream peeling off lotus pods. (Xin Qiji's "Qing Ping Le. Village Residence")

The grass is growing and the orioles are flying in February, and the willows are blowing on the dike and the green smoke is intoxicating. Children come back early from school and are busy flying kites in the east wind. (Gao Ding's "Village Residence")

When I was young, I didn't know the moon, so I called it a white jade plate. (Li Bai's "Gu Lang Yue Xing")

Whose house outside the fence does not tie up the boat, and the spring breeze blows into the fishing bay. Suspecting that there are villagers, the child rushes to Chaimen to go to Queguan (Cui Daorong's "River Dwelling")

The child with unkempt hair is learning fishing, sitting sideways on the strawberries and grass. Passers-by ask questions and wave from a distance, fearing that the fish will be frightened and not respond (Hu Lingneng's "Children's Fishing")

Music:

What is noise? What is music?

When vocal cords, strings, wooden boards, motors and other objects vibrate, they emit sound waves. The sound waves propagate through the air and enter our ears, allowing us to hear sounds. Sound can be divided into noise and musical sound: the sound that vibrates irregularly, such as the sound of wooden boards, motors, etc., is called noise; the sound that vibrates regularly, such as the singing sound produced by the vocal cords, the sound produced by the strings, etc., is called musical sound. The sounds used in music are mainly musical sounds.

3. What is pitch?

Some musical notes sound high and some sound low. This is called pitch. The pitch is determined by the vibration frequency of the sounding object. The higher the frequency, the higher the sound. The lower the frequency, the lower the sound. For example, when a woman sings, her vocal cords vibrate at a higher frequency, while when a man sings, his vocal cords vibrate at a lower frequency, so the male voice is lower than the female voice.

4. What is the range of tones used in music?

The musical tones used in music range from the lowest, which vibrates 16 times per second, to the highest, which vibrates 4186 times per second, approximately 97 times. The largest modern piano can play 88 of the notes, making it the instrument with the largest range of sounds. Due to physiological limitations when people sing, the musical sounds they can sing are only a small part of the musical range.

5. What is a sound name? What is roll call?

Musical sounds of different pitches are represented by C D E F G A G. These seven Latin letters are the names of the musical sounds. They are usually sung in sequence as DO RE MI FA SOL LA SI, which is sung as 1 in simplified notation. 2 3 4 5 6 7, which is equivalent to the pronunciation of the Chinese character "Duolai Mifa Solasi". DO, RE, MI... are the pronunciation of musical sounds when singing, so they are called roll calls.

6. What is a sound sequence? How are the sound sequences grouped?

Arrange the more than 90 musical tones of different levels mentioned above in order to form a sequence. This sequence is called a tone sequence. There are only seven sound names, but the number of sounds in the sound sequence greatly exceeds this number. How to distinguish sounds with the same sound name but different pitches? The method is grouping. People divide the sounds in the sound sequence into several groups. The central group of notes in the sequence (that is, the seven tones starting from the middle C and going upwards in keyboard instruments such as pianos and electronic keyboards) is called a group of small characters. The bars are twice as high, twice as high, and three times higher than the group of small characters. The sounds of times are called the second group of small characters, the third group of small characters, and the fourth group of small characters. Of course, there are sounds in the music that are lower than a group of small characters. Their groups are: those that are twice as low as a group of small characters are called small character groups, those that are twice as low as a group of small characters are called a group of large characters, those that are three times lower than a group of small characters are called a group of large characters, and those that are four times lower are called a group of large characters. It's called the second group of big characters. In this way, the order of the groups in the phonetic sequence from low to high is:

Two groups of large characters, one group of large characters, one group of small characters, one group of small characters, one group of small characters, two groups of small characters, three groups of small characters and four groups

The musical term for the range of musical tones is called range. The vocal range of the human voice is roughly: for female voices, it ranges from F in the small group to a in the second group of small characters, and for male voices, it ranges from F in the large group to a in the small group. So, how wide is your vocal range? Try it on the piano when you have the chance. Starting from the lowest note you can sing and ending with the highest note, this range is your vocal range.

7. Which sound is the standard sound?

International regulations stipulate that the a sound in a group of small characters vibrates 440 times per second, and this sound is the standard sound. Since there is a certain quantitative relationship between each sound in the sound sequence, for example, a sound that is twice as high as a certain sound (also called one octave higher) must have a frequency that is twice as high as a certain sound and twice as low as it. The frequency of a sound (also called one octave lower) must be twice lower than a certain sound, so specifying the pitch of the standard sound is equivalent to specifying the pitches of other sounds. With this standard, people have a basis for tuning when making musical instruments, playing music, and singing.

8. What is whole tone? What is a semitone?

Divide the distance of the group of notes C D E F G A B into twelve equal parts, and each equal part is called a "semitone". If the distance between two tones is two "semitones", it is called a "whole tone".

On keyboard instruments such as pianos and electronic keyboards, C-D, D-E, F-G, G-A, A-B, there is a black key between the two notes, and the distance between them is the whole tone; E-F, B-C, there is no black key between the two notes. The keys are separated by a semitone.

9. What is natural sound? What is inflection?

In layman's terms, when we sing, the sounds that are sung as 1 2 3 4 5 6 7 are called natural sounds; those with a # sign in their upper left corner (such as #4, #1 ) or b (such as b7, b3), it is called a consonant. # is called a sharp sign, which means that the sound is raised by a semitone on the original basis; b is called a flat mark, which means that the sound is lowered by a semitone on the original basis.

10. What is a musical scale?

Take one of the sounds C, D, E, F, G, A, B, etc. as the center, and arrange them in order from low to high (or from high to low). Because this sequence of sounds is like a ladder, going up or down step by step, it is called a musical scale. The following two sequences are both musical scales, the former is a major scale and the latter is a natural minor scale:

c d e f g a b c a b c d e f g a

11. What is notation?

A piece of music generally contains elements such as high and low, length, strength and weakness. The method of recording these elements on paper using various marks and symbols is called notation. There are many notation methods that have been used and are currently in use at home and abroad. Take our country as an example. There are many notation methods used in ancient and modern times. It is said that as early as the Warring States Period, a musician named Shi Juan under Wei Linggong was able to use a certain notation method to notate music. According to written records, Gongchipu and Jiazipu (for guqin) were produced during the Sui and Tang dynasties in my country, and in the Song Dynasty, vulgar calligraphy was produced. Gongchipu has been modified several times and is still used by folk artists today. However, in modern times, simplified musical notation and staff music are more commonly used in our country, especially the most popular ones. From a global perspective, the most commonly used instrument is the staff.

12. What is simplified musical notation?

Simplified music notation is a notation method that uses Arabic numerals 1, 2, 3, 4, 5, 6, and 7 to record pitches. Almost all Chinese people who have read books know it. This notation was proposed by the French monk Sueti in 1665. Later, it was the famous French philosopher and writer Rousseau who improved and actively promoted it. Because this notation was inconvenient for recording polyphonic and complex music, it was almost never popular in Europe. Around 1882, the American Mason introduced it to Japan when he gave lectures in Japan. It was once used in Japanese schools in the 19th century, but they no longer used it. In the late Qing Dynasty, simplified musical notation was introduced to my country through students studying in Japan. In 1904, the book "School Singing Method" written by Mr. Shen Xingong was published, which became popular for a while. From then on, simplified musical notation became popular in our country. The author believes that simplified musical notation, as a popular recording method, has played and still plays a great role in popularizing and promoting music in our country. However, because it has many limitations in notating music, and most countries in the world do not use it now, we should create conditions to promote and popularize staff music notation in order to improve the level of music and conduct music and cultural exchanges with countries around the world.

13. What is a staff?

Staff notation is the most widely used notation method in the world. Among the current notation methods, staff notation is the most rigorous, accurate and scientific in comparison. It uses five parallel horizontal lines to record the pitch of the sound, and uses a hollow (or solid) oval or a figure with a vertical line on one side (some even add a "tail" at one end of the vertical line) as a note to represent the length of the sound ( For examples, please see the music score posted on this site) It has a three-dimensional effect and is convenient for recording multi-part music. It was officially introduced to our country at the end of the 17th century. It was introduced in detail in the "Continuation of Lu Lu Zhengyi" compiled by the court during the Kangxi period of the Qing Dynasty, which shows that it has been introduced to our country for a long time. In 1930, musician Mr. Liu Tianhua recorded the operas sung by Mei Lanfang in five-line notation and published "Mei Lanfang's Song Score", which was my country's first special collection of opera music.

Some people think that five-line notation is more difficult to learn than simple notation. This concept is easy to understand. In fact, the main reason is not that staff music is difficult, but that it is difficult to change the music-reading habits developed since childhood. The music scores you have been exposed to since childhood are all simplified notations, and you have become accustomed to the set of simplified notations. Of course it is difficult to change now. If you start using five-line notation in kindergarten, it will also be the same in primary school and middle school music textbooks. The music you usually see is five-line notation. Over time, it will become a natural habit. Nowadays, many children start learning piano at the age of three or four (to learn piano, you must use five-line musical notation). From shallow to deep, from simple to complex, reading music and practicing piano go hand in hand. Therefore, although many children are young, they cannot read lines by sight. The ability to read music is much stronger than that of many adults. What's the point? Practice makes perfect!

Literature:

"The Romance of the Three Kingdoms"

The story of the Three Kingdoms was quite popular among the people in ancient my country. It was put on the stage in the Song and Yuan Dynasties, and more than 30 kinds of Three Kingdoms plays were performed in the Jin and Yuan Dynasties. During the Zhizhi period of the Yuan Dynasty, "Quanxiang Three Kingdoms Zhi Ping Hua" published by the Yu family of Xin'an appeared. At the end of the Yuan Dynasty and the beginning of the Ming Dynasty, Luo Guanzhong synthesized folk legends, operas and scripts, combined with historical materials from Chen Shou's "Three Kingdoms" and Pei Songzhi's annotations, and based on his personal understanding of social life, he created "The Popular Romance of the Three Kingdoms". The earliest extant edition is from the Jiajing year of the Ming Dynasty. The printed version is commonly known as the "Jiajing version" and has 24 volumes.

During the Kangxi period of the Qing Dynasty, Mao Lun and Mao Zonggang's father and son reviewed the official historical events, added and deleted text, and revised it into the 120-chapter version of "The Romance of the Three Kingdoms" that is popular today.

Luo Guanzhong lived between 1330 and 1400. His name was Huhai Sanren, and he was a popular novelist in the Ming Dynasty. His birthplace is said to be Taiyuan in present-day Shanxi, and Qiantang in present-day Hangzhou, Zhejiang, but it cannot be confirmed. According to legend, Luo Guanzhong once served as the secret agent of Zhang Shicheng, a peasant uprising army in the late Yuan Dynasty. In addition to "The Popular Romance of the Three Kingdoms", he also wrote popular novels such as "The Chronicles of the Sui and Tang Dynasties" and dramas such as "The Legend of Zhao Taizu, Dragon and Tiger".

"The Romance of the Three Kingdoms" describes the historical events of nearly a hundred years from the end of the Eastern Han Dynasty to the early years of the Western Jin Dynasty. The whole book reflects the political and military struggles of the Three Kingdoms era, the penetration and transformation of various social contradictions in the Three Kingdoms era, summarizes the great historical changes of this era, and creates a group of powerful heroes. In terms of grasping the history of the Three Kingdoms, the author showed an obvious tendency to support Liu and oppose Cao. He took Liu Bei as the center of the description, praised Liu Bei, and tried his best to expose and flog Cao Cao. Today we should have a dialectical understanding of the author's tendency to support Liu and oppose Cao. Respecting Liu and rebelling against Cao was the main trend in folklore, which during Luo Guanzhong's time implied the people's hope for the rejuvenation of the Han nation.

"The Romance of the Three Kingdoms" depicts nearly 200 characters, among whom Zhuge Liang, Cao Cao, Guan Yu, Liu Bei and others are the most successful. Zhuge Liang is the incarnation of a "virtuous prime minister" in the author's mind. He has the noble character of "devoting his whole life to the end of his life" and his ambition to help the people in modern times and recreate a peaceful and prosperous age. The author also endows him with the magical ability to control the wind and rain and make miraculous calculations. Cao Cao was a treacherous hero. His creed in life was "I would rather teach me to betray the people of the world than teach the people of the world to betray me." He was both talented and strategic, but also cruel and treacherous. He was a political careerist and conspirator. This is different from the real Cao Cao in history. Not to be confused with. Guan Yu is "mighty and resolute" and "righteous as heavy as a mountain". But his loyalty is based on personal grievances, not the great justice of the country and the nation. Liu Bei is portrayed by the author as a model of a benevolent king who loves people and things, values ??virtuous people, and knows people well.

"A Dream of Red Mansions"

"A Dream of Red Mansions" is the pinnacle of ancient Chinese novels. There are 120 chapters in the book, the first 80 chapters are written by Cao Xueqin, and the last 40 chapters are said to be continued by Gao E.

Xueqin 1715? 1763? His name is Zhan, his courtesy name is Meng Ruan, his nickname is Xueqin, and he is also known as Qinxi layman. A great novelist of the Qing Dynasty. One theory is that his ancestral home is Fengrun, Hebei, and another is Liaoyang, Liaoning. After the Qing Dynasty entered the customs, he was admitted to the Ministry of Internal Affairs of Zhengbai Banner. From his great-grandfather to his father, Jiangning weaving has been hereditary in his family. When he was young, his family was prosperous and distinguished. Later, his father was convicted, his property was confiscated, and his family declined. The Cao family moved from the south to the north. After middle age, they lived in the northwest suburbs of Beijing. Their family was poor and they lived a life of "eating porridge as a family". Cao Xueqin is versatile, good at poetry and painting, a drinker and talkative, and has an arrogant personality. When he wrote the 80th chapter of "A Dream of Red Mansions", he was forced by poverty and illness, and his beloved son died in infancy, so he passed away with regret, making "A Dream of Red Mansions" an unfinished work.

"A Dream of Red Mansions" is also known as "The Story of the Stone" and "The Story of Gold and Jade". It is based on the background of the four major families of Jia, Wang, Shi and Xue, with the love story of Jia Baoyu and Lin Daiyu as the main line, and revolves around two main characters. The emotional entanglements of the characters describe a series of love stories of young men and women inside and outside the Grand View Garden. At the same time, by describing the social environment in which these love tragedies occurred, it involves issues such as feudal society's politics, laws, patriarchy, women, morality, marriage, etc., revealing the state of the world at the end of feudal society, and exposing the decadence of the feudal aristocratic class and its rule. and sin, it eulogizes the rebellious characters who pursue light, and declares that this society is bound to perish through the tragic fate of the rebels. It can be said that "A Dream of Red Mansions" is an encyclopedia of social life in the late feudal society of my country.

"A Dream of Red Mansions" has created vivid characters such as Jia Baoyu, Lin Daiyu, and Xue Baochai. Baoyu always stood outside the spiritual ethics of feudalism. He regarded official career as a trap, used social writing as a tool to gain fame and reputation, and regarded reading sages as a fearful path. He not only had a strong dandy habit of a noble prince, but also had anti-feudal rebelliousness. . He respects women, respects individuality, and pursues freedom. He is a rebellious example of an aristocratic family and even the feudal system; Daiyu is a pure, aloof and sentimental aristocratic lady. She regards love as her life, but her love But she was destroyed because she was not allowed to belong to aristocratic families; Baochai was a feudal lady who followed women's ethics and abided by women's rules. She was also a victim of the feudal system.

"A Dream of Red Mansions" breaks through the traditional way of collecting materials and conception, and highly condenses society into the scope of the family for an overall presentation. The Jia family is actually a microcosm of the entire society.

The writing skills of "A Dream of Red Mansions" have reached the level of proficiency. The characters described are all lifelike, with distinct personalities and multiple personalities. It breaks the stereotyped characteristics of previous novels and the author's creativity in shaping the characters. The main techniques include: using meticulous craftsmanship to create different characters in a broad social background; paying attention to the individuality of the characters, and making psychological descriptions specific and concise; placing the characters in a specific artistic atmosphere to highlight their personalities. Inner emotions.

"A Dream of Red Mansions" absorbs the nutrition of Chinese classical literary language, and refines the popular language, casting it into an accurate, refined, pure, expressive and elegant language.

The plot arrangement of "A Dream of Red Mansions" is clearly organized and is an organic whole; its structure is interconnected, criss-crossed, prioritized and orderly, just like life itself, without any artificial axe. traces.

On the surface, "Dream of Red Mansions" seems to be ordinary trivial matters in life, but it can see the big things from the small, understand the subtle things, reflect the essence of life, and has rich and profound social significance.

After the publication of "Dream of Red Mansions", with its profound ideological connotation and superb artistic charm, it shocked the hearts of generations of readers, had a huge influence across time and space, and formed a momentum in the field of academic research. The vast "red science". After more than two hundred years of ups and downs, "Red Studies" has not declined, but has become more prosperous. This fully illustrates the artistic value of "A Dream of Red Mansions".

Common sense in daily life:

1. For small area skin injuries, applying a little toothpaste can immediately stop bleeding and relieve pain, and can also prevent infection. The effect is quite good.

2. Put the washing powder and cigarette butts in the water together. After dissolving, use them to clean the glass and screen windows. The effect is good.

3. Put the shrimps into a bowl, add a little refined salt and edible alkali powder, catch them with your hands for a while, soak them in water, and then wash them with water. This will make the fried shrimps as transparent as crystal. Tender and delicious

4. Tips for making dumpling noodles: Mix 6 egg whites into 1 pound of flour. The protein will solidify quickly after the dumplings are put into the pot. The dumplings will absorb water quickly after being taken out of the pot and will not stick easily< /p>

5. Soak the remaining tea leaves in water for several days, then pour them on the roots of plants to promote plant growth; or dry them in the sun and burn them in toilets or ditches to remove odors and repel mosquitoes and flies.

6. Method of recooking rice with uncooked rice: If the rice is uncooked, you can use chopsticks to poke some holes in the rice, sprinkle a little rice wine and simmer again. If only the surface is uncooked, just flip the surface to the middle.

7. If it is necessary to blanch vegetables when cooking, use the water used to blanch the vegetables as much as possible. For example, when making dumplings, you can put an appropriate amount of blanched water into the meat filling, which not only preserves nutrients, but also makes the dumpling filling delicious and soupy

8. Tips for scrambled eggs: Break the eggs into a bowl and add a little warm water. Stir evenly, pour into the oil pan and fry. When frying, add a little wine into the pan, so that the fried eggs will be fluffy, tender and delicious.

9. How to use a casserole 1: When you use a newly bought casserole for the first time, it is best to use it to cook porridge, or use it to boil thick rice washing water to block the fine pores of the casserole. Prevent water seepage.

10. Use thirteen spices skillfully: use tangerine peel when stewing meat, which has a rich aroma; add Angelica dahurica to beef and mutton, which can remove the mutton and increase the freshness; use cinnamon for homemade sausage, which is delicious; use cloves for bacon and chicken. , endless aftertaste.

11. Tips for kneading dumpling noodles. The noodles should be slightly hard. After kneading, put it in a basin and cover it tightly. Let it sit for 10-15 minutes. Wait until the gliadin in the noodles absorbs water and expands to fully form. Wrap it after gluten.

12. Coriander is an umbelliferous plant, rich in essential oils, but it is highly volatile and cannot withstand prolonged heating. It is best to add it before eating to retain its aroma.

13. When performing high-temperature washing or drying procedures, do not touch the door glass to avoid burns. When taking out clothes from the dryer, be careful about the metal parts of the clothes to avoid burns.

14. If the collar and cuffs are dirty, you can soak the clothes in warm water dissolved with washing powder for 15-20 minutes, and then wash them normally.

15. How to use a casserole 2: When using a casserole to make soup or stew meat, first put water in the casserole, then put the casserole on the fire, first use a slow fire, and then use a high fire.

16. When cooking vegetables, add some water chestnut starch to make the soup thicker. This not only makes the cooked vegetables delicious, but also because the starch contains glutathione, it has a protective effect on vitamins. .

17. If the rice is burnt, quickly turn off the heat, put a piece of bread crust on top of the rice, and cover the pot. After 5 minutes, the bread crust will absorb the smell.

18. The amount of washing powder used: If the clothes are not too dirty or there is too much foam during washing, the amount of washing powder should be reduced. Avoiding excessive use of washing powder not only saves money but also protects the environment and makes the washing machine more durable.

19. When cooking dumplings, add enough water. After the water boils, add 2% salt and dissolve it before adding the dumplings. This can increase the toughness of the gluten and the dumplings will not stick to the skin or bottom. The color will turn white and the soup will be clear and fragrant.

20. Many people like to eat vegetables but do not like to drink vegetable soup. In fact, most of the vitamins have been dissolved in the vegetable soup when cooking. For example, after the cabbage is fried, 70% of the vitamin C will be dissolved in the vegetable soup.

21. If the white socks turn yellow, soak them in a detergent solution for 30 minutes before washing.

22. How to use the casserole 3: When removing the casserole from the fire, be sure to place it on a dry wooden board or straw mat, never on tiles or cement floors.

23. When cooking meat dishes, add some vinegar after adding wine, and the dishes will become fragrant. When cooking vegetarian dishes such as bean sprouts, add some vinegar appropriately, which tastes good and is nutritious, because vinegar has a protective effect on vitamins

24. Bread can eliminate oil stains on clothes: When eating, if your clothes are stained by oil stains, If it is stained, you can rub it lightly with fresh white bread and the oil stains can be eliminated.

25. Use residual tea leaves to scrub wooden and bamboo tables and chairs to make them smoother. Dry the remaining tea leaves and spread them in humid places to remove moisture. After the remaining tea leaves are dried, you can also put them into pillowcases to serve as pillow cores, which are very soft.

26. After the dumplings are cooked, use a strainer to take them out, then rinse them in warm water before putting them on a plate. The dumplings will not stick to each other.

27. Tips for frying fresh shrimps: Before frying fresh shrimps, you can first blanch the shrimps in boiling water soaked in cinnamon, and then fry them again, so that the fried shrimps will taste more delicious.

28. As much as possible, vegetables should be fried and eaten immediately, and avoid long-term heat preservation and repeated heating. In addition, in order to make the vegetable stems cook easily, you can add a little water to simmer them after quick frying.

29. When boiling eggs, you can first soak them in cold water for a while, and then boil them in hot water. In this way, the shells of the cooked eggs will not crack and are easy to peel off.

30. Men can use toothpaste instead of soap when shaving. Since toothpaste does not contain free alkali, it is not only non-irritating to the skin, but also has rich foam and a fragrant smell, making people feel cool and comfortable.

31. The wonderful use of Fengyoujing (1): Sprinkle a few drops of Fengyoujing on the leaves of the electric fan. With the continuous rotation of the fan blades, the room will be filled with fragrance, and it will also drive the air away. Mosquito effectiveness.

32. Before painting, apply cream on your hands. After painting, apply the cream to the skin stained with paint, wipe it with a dry cloth, and then wash it with soap to remove the attached skin. Remove paint from skin.

33. Tofu generally has a brine smell. Before putting the tofu in the pot, if you soak it in boiling water for more than 10 minutes, the brine smell can be removed. The tofu made in this way not only tastes good, but also tastes delicious and sweet.

34. Bread can eliminate carpet stains: If the small carpet at home is dirty, you can wipe it with hot bread crumbs, and then hang it in a cool place. After 24 hours, the stain can be removed.

35. If the watch is magnetized, it will affect the accuracy of the time. The elimination method is very simple. Just find an unmagnetized iron ring, put the watch in the ring, and slowly wear it back and forth. After a few minutes, the watch will be demagnetized and restored.

36. Tofu bias Cold, those who usually have a cold stomach should not eat tofu if they experience chest tightness, nausea, etc. after eating tofu; those who are prone to diarrhea, bloating and spleen deficiency should not eat more tofu

37. Toothpaste also has a skin cleansing function! When taking a bath, use toothpaste instead of bath soap to rub your body to remove dirt. It not only has an obvious skin cleansing function, but also makes the whole body cool after bathing. It also has the effect of preventing prickly heat

38. When cooking in a microwave oven, Start by saturating the ingredients with seasoning. This is because the microwave cooking process is fast, and it is difficult to absorb the flavor if it is not thoroughly soaked, and the aroma-enhancing effects of onions, ginger, garlic, etc. are also difficult to play

39. Tips for relieving eye fatigue: Soak medicine in water Use eyebright or chamomile flowers, then soak the towel and apply it to the eyes for 10 to 15 minutes, which can effectively relieve eye fatigue.

40. It is not advisable to use raw water for cooking. Because tap water contains chlorine, it will destroy the vitamin B1 contained in the food during the cooking process. If you use boiling water to cook, the vitamin B1 will be protected from loss.

41. Tips for preventing chopping boards from cracking: After buying a new chopping board, apply cooking oil on the upper and lower sides of the chopping board and around it. Wait for the oil to dry up before applying it again. Apply it three or four times and wait until the oil dries. Use it, so that the cutting board will be durable

42. The wonderful use of Fengyoujing (2) When adding a few drops of Fengyoujing to the water, you will feel cool and comfortable all over the body after bathing, and it can also prevent and treat prickly heat. , prevent mosquito bites, and remove sweat odor.

43. When frying steamed bun slices, first soak the steamed bun slices in cold water and then fry them in a pan. In this way, the fried steamed bun slices will be browned and crispy, which is both delicious and fuel-saving.

44. When cooking or making soup, if it becomes salty, you can cut a washed potato in half and put it into the soup for a few minutes, so that the soup will become lighter. .

45. Taking antihypertensive drugs with grape juice is effective! Using grape juice instead of boiled water to take antihypertensive drugs can lower blood pressure steadily without the phenomenon of high and low blood pressure.

46. The weather is hot in summer, and prickly heat is easy to develop on the body. You can wash the area with warm water and apply a layer of toothpaste. The prickly heat will disappear soon.

47. Even if the indoor toilet is flushed cleanly, it will often leave a smell. As long as a small cup of balsamic vinegar is placed in the toilet, the smell will disappear. It is valid for six or seven days and can be replaced once a week.

48. If you use old rice to make rice, after washing the rice, you can add 1/4 or 1/5 beer to the rice while adding water. This will make the steamed rice sweet and shiny. , just like new rice.

49. Soaking hands in hot water can cure migraine. Immerse your hands in hot water, enough to cover your wrists, and heat the water continuously to keep it warm. After half an hour, the pain will be relieved or even disappear completely

50. When cooking dumplings, most of the water-soluble nutrients in the dumpling wrapper and filling are dissolved in the soup, except for a small loss due to heat. , so it’s best to drink the soup when eating dumplings.

Popular Science:

Modern biomechanics probably originated in the late 1960s, when the development of biomechanics and sports biomechanics entered a period of formation and development.

During this period, experts conducted active research on the biomechanical characteristics of human and animal movements. The scientific research of the following scholars is widely known: Alexander's "Biomechanics" in 1970; Vuko Brodovich's 1974 study of animal movements. mathematical simulation, and thus promoted the development of robot manufacturing technology; in 1968, Hilijboland created a theory about animals moving with uniform steps; in 1968, Sukhonov created a general system for the movement of terrestrial vertebrates ; Hatton's research on the regulatory mechanism of the human support movement system; Miller's research on the biomechanics of human movement. The first international biomechanics symposium was held in 1967. The International Society of Biomechanics was formally established in 1973, marking the formal establishment of the discipline of biomechanics. During this period, sports training was formed as an independent discipline in the Soviet Union. Before that, it had only developed within the scope of physical education. The following textbooks became the first works to elaborate on the knowledge system of sports training: "Modern System of Sports Training" by Ozolin of the Soviet Union (1970), "Training Science" edited by Halle of Germany (1971), Poland and Uzbekistan Lidowski's "Sports Training Theory and Methods". This promotes the development of new scientific directions in sports biomechanics within the scope of sports training.

With the continuous expansion of the scope of research on sports training issues, research on biomechanics from different angles has been actively developed in terms of technical analysis of athletes' movements in completing competitions. Most of the major institutions currently studying sports biomechanics are in Eastern European countries, such as Poland and Russia (mainly conducting biomechanics research in cities such as Moscow, St. Petersburg, Volgograd, Krasnodar, and Novosibirsk), Ukraine (Kiev State Sports Institute University and Kharkiv State Academy of Sports Sciences). The practical significance of modern sports biomechanics research is determined by the following two reasons: on the one hand, the social significance of sports continues to improve, and the number of sports events continues to increase. These determine the necessity and future of sports biomechanics research. ; On the other hand, with the rapid development of science and technology, many new scientific research methods have emerged, which provide the possibility to comprehensively study athletes' skills in completing competition movements, and subsequently improve their training and competition performance.

There are clearly several directions in the development of modern biomechanics, namely engineering biomechanics, medical biomechanics and educational biomechanics (Donskoy, 1997). Engineering biomechanics and medical biomechanics have been well theoretically studied, and there are instruments and equipment that are well known and used by everyone, which determines that their research is based on a relatively high level of scientific methods, while in educational biomechanics There is another situation in the research, which is mainly used to solve teaching tasks.

Educational biomechanics is a relatively new branch of biomechanics research. It is still in the stage of accumulation and understanding of basic materials and is forming its own theoretical doctrine. An important task of educational biomechanics at this stage is to create a theory based on a conceptual system that explains and predicts the main direction of the development of the phenomenon under study.

The expansion of the scope of biomechanical research on physical education and exercise issues and the further development of physical education and exercise theory have prompted the formation of a relatively new scientific research direction in educational biomechanics—evolutionary biomechanics. The main task of evolutionary biomechanics is to reveal the evolution rules of human movements by studying the natural development rules of human beings. This is indeed an important task, because if we cannot understand the regularity of changes in human motor functions with age, then it is impossible to correctly formulate training plan. The scientific research results conducted by Professors Balisevic, Sudura and Academician Yang Jintian indicate: (1) There is an imbalance in the development of human motor function components and structures (for ensuring morphological and functional mechanisms) in individual development; (2) ) The development of human movements in ontogeny is multi-layered and rhythmic; (3) The performance of human movements in ontogeny is highly individualized; (4) The absolute outcome of human motor function development depends on physical activity characteristics and strength.

History:

1. In 581, Yang Jian (Emperor Wen of the Sui Dynasty) seized the power of the Northern Zhou Dynasty, established the Sui Dynasty, and made Chang'an the capital.

2. In 589, the Sui Dynasty destroyed the Chen Dynasty and unified the north and south.

3. Starting from 605, Emperor Yang of the Sui Dynasty opened a Grand Canal running from north to south.

4. The Grand Canal of the Sui Dynasty was centered on Luoyang, reaching Zhuojun in the north and Yuhang in the south, with a total length of more than 2,000 kilometers. It was the longest canal in the ancient world.

5. The Grand Canal of the Sui Dynasty was divided into four sections: Yongji Canal, Tongji Canal, Hangou, Jiangnan River and five major rivers: Haihe, Yellow River, Huaihe, Yangtze River and Qiantang River.

In 6. 618, Emperor Yang of the Sui Dynasty was killed by his generals in Jiangdu, and the Sui Dynasty was destroyed.

7. In 618, Li Yuan rebelled against the Sui Dynasty in Taiyuan and entered Chang'an to establish the Tang Dynasty.

8. The only female emperor in the history of our country was Wu Zetian. She became emperor in her later years and changed the name of her country to Zhou.

9. Emperor Taizong of the Tang Dynasty attached great importance to the development of production and the reduction of taxes and labor on farmers; he emphasized the role of talented people and humbly accepting advice. He appointed Fang Xuanling, who was rich in strategy, and Du Ruhui, who was good at making decisions on important matters, as prime ministers. They were known as "Fang's plans and Dujue". Wei Zheng, who dared to speak out, was reused as a famous remonstrator.

10. During the reign of Emperor Taizong of the Tang Dynasty, politics was relatively clear, economic development was rapid, and national strength was gradually strengthened.

Historically, the rule at that time was called the "Government of Zhenguan".

11. The world's first tea monograph "Tea Classic" appeared in the Tang Dynasty. The author Lu Yu was called the "Tea God" by later generations.

12. The famous official promoted by Wu Zetian and appointed as prime minister by Emperor Xuanzong of Tang Dynasty was Yao Chong.

13. The ceramic industry developed significantly in the Tang Dynasty, with Yue Kiln celadon, Xing Kiln white porcelain and Tang Sancai being the most famous. Tang Sancai is a treasure of world crafts.

14. During the Tang Dynasty, the country’s major cities included Chang’an, Luoyang, Yangzhou, and Chengdu.

15. Chang'an City is divided into Fang and City. Fang is a residential area and City is a prosperous business district.

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