Man's law is based on the earth, the earth is based on the sky, the sky is based on the Tao, and the Tao is natural.
-Lao Tzu as early as more than two thousand years ago, Lao Tzu revealed to us what common sense is. In fact, nature is a common sense and does not need much exploration. It exists objectively, but it has always been ignored by us. Common sense has its relativity. Of course, what we have to do is to apply common sense to our lives.
For a farmer, ploughing, transplanting, irrigation and harvesting in agriculture are common sense; For a college student, addition, subtraction, multiplication and division in operation is common sense; For a stockholder, entering positions, covering positions, bear markets and small-cap stocks in the stock market are common sense; For a chef, frying, boiling, frying and frying in cooking are common sense; However, for a baby, eating, drinking and sleeping is common sense ... but as long as the object changes, common sense becomes advanced applied knowledge. You can't let a farmer's uncle do advanced physics problems with a pen, let a baby farm and so on. Very irrational, because common sense is relative, and common sense is like "whether there is mutual existence or not, it is difficult, and the length is different." "Know, on; I don't know, I'm sick. " We are not saints. Everything in the world has too much common sense. We can't all understand. Know is know, don't know is don't know, so continue to study hard.
Of course, no matter how much common sense a person has, it is useless to stay in study, only to know how to use it! "Big, big, big, National People's Congress. There are four major fields in the field, and human beings are one of them. " As a member of nature, human beings should contribute their own abilities to transform nature and make nature and human life more harmonious and beautiful.
Water conservancy experts all know that blocking, dredging, draining and storing are common sense of flood control, but there are still floods in China. As early as the end of the Warring States Period, Li Bing of Qin designed Dujiangyan, which was "deep scouring the beach, low weir, cutting corners when encountering the bay and pumping out the heart", completely solving the local flood and turning harm into benefit. Sichuan has become a "land of abundance", and it is also a water conservancy. Chinese medicine knows that looking, smelling, asking and being anxious are common sense. According to legend, Hua Tuo's master was ill, and his brothers and sisters could not be diagnosed. Finally, Hua tuo also looked at it and concluded that the master was pretending to be sick. Finally, his master also admitted that the same master taught him medical skills and the same diagnosis and treatment method. Hua Tuo made a diagnosis and treatment pair, and other disciples failed.
For military strategists, all kinds of marching, disposal and offensive and defensive strategies are common sense. During the Warring States Period and the Zhao-Qi War, Lian Po used deep trenches and high bases for defense. However, after Zhao Kuo, Zhao Kuo's theory on paper was of course a crushing defeat, and 400,000 Zhao troops were sacrificed in vain, which is the famous battle of Changping ... All kinds of signs can explain that even if you learn countless common sense, you will learn in vain if you don't use it, so we. In my common sense, common sense is like this, it has its relativity, but it is more important to use common sense to actively change life.
2. How to study efficiently and how to use knowledge in exams.
Experience 1: 1, you might as well set yourself some time limits.
It's easy to get tired of studying for a long time. At this time, you can divide your homework into several parts and limit the time of each part, for example, finish this exercise within one hour and finish that test before eight o'clock. This will not only help to improve efficiency, but also avoid fatigue. If possible, gradually shorten the time used, and soon you will find that the homework that you couldn't finish in an hour before is now finished in 40 minutes.
2. Don't do other things or think about other things while studying. Everyone knows that you can't do two things at once, but there are still many students who listen to music while studying.
Maybe you will say that listening to music is a good way to relax your nerves, so you can concentrate on studying for an hour and then relax listening to music for a quarter of an hour, which is much better than doing your homework with headphones on. Don't review the same lesson all night.
I used to spend an evening watching math or physics. Practice has proved that it is not only easy to get tired, but also has a poor effect. Later, I arranged to review two or three classes every night, and the situation was much better.
You don't need to take detailed notes in class except for very important content. Busy taking notes in class will be inefficient, and there is no guarantee that you will take notes after class.
The main work in class should be to digest and absorb the teacher's lecture content and make some brief notes appropriately. Lesson 2: I have also talked to many people about learning efficiency.
We often see such a situation: a classmate studies very hard, studying at school, studying at home, sometimes staying up late and doing countless problems, but his grades are always not up. In fact, I am also very anxious in the face of such a situation. Originally, what you paid should be rewarded. Moreover, if you pay more, you should get a lot of rewards. This is a natural thing. But this is not the case. There is an efficiency problem here.
What does efficiency mean? Just like learning, some people will practice it ten times, while others need to practice it a hundred times. There is an efficiency problem. How to improve learning efficiency? I think the most important thing is to combine work and rest.
What is most needed to improve learning efficiency is a clear and agile mind, so proper rest and entertainment is not only beneficial, but also necessary, which is the basis of improving learning efficiency. So how to improve the efficiency of class? In my experience, it is necessary to preview before class, but my preview is rough, and I only glance at the teaching materials, so that the contents and key points of the teaching materials are roughly in my mind and I can be more targeted when I attend classes.
When we preview, we don't need to be too detailed. If we are too detailed, it is a waste of time. Second, I will be a little lax in class, and sometimes I will ignore the most useful things. It is of course necessary to listen carefully in class, but as one of my former teachers said, no one can concentrate in a class, which means it is impossible to concentrate for more than 40 minutes, so there is also a problem of time allocation in class. Teachers can relax when they talk about familiar things.
In addition, taking notes sometimes hinders the efficiency of class. Sometimes a class is busy copying notes, and sometimes something very important is ignored, but this does not mean that you can not take notes, which is not enough. Everyone will forget that with notes, there will be a basis for review. Sometimes the teacher talks a lot and writes a lot on the blackboard, but you don't need to remember them all. Of course, you should remember some books. Otherwise, remember what you see, which will inevitably affect the efficiency of class, and the loss will outweigh the gain.
How to improve the efficiency of doing problems? The most important thing is to choose a "good topic" and never do it indiscriminately. In that case, it will often get twice the result with half the effort. The questions are all around knowledge points, and many questions are quite similar. First, choose the knowledge point you want to strengthen, and then choose the questions around this knowledge point. There are not many problems. Just a similar question is enough. After choosing the topic, you can do it seriously.
The improvement of problem efficiency largely depends on the process after the problem is solved. For the wrong question, we should seriously think about the cause of the error, whether it is because the knowledge points are unclear or careless. After the analysis, do it again to deepen the impression, so that the efficiency of doing the problem will be much higher. Comments: Yu Xia's suggestion on attending lectures and doing problems actually reflects an important method to improve learning efficiency-"keeping your strength on the cutting edge", that is, allocating time reasonably, paying attention to key points when attending lectures and taking notes, and grasping typical examples when doing problems, which is "getting twice the result with half the effort" in learning.
Experience 3: Learning efficiency is an important factor in determining academic performance. So, how can we improve learning efficiency? First, confidence.
Many scientific studies have proved that human potential is great, but most people have not effectively developed this potential. Among them, people's confidence is a very important aspect. No matter when and where you do anything, with this confidence, you will have the belief of winning, and you will soon get rid of the shadow of failure.
On the contrary, if a person loses self-confidence, he will accomplish nothing, and it is easy to fall into eternal inferiority. Another important means to improve learning efficiency is to learn to concentrate.
The process of learning should be a process of thinking with the brain. Whether you look with your eyes, read with your mouth, or copy by hand, they are all means to help your brain. The real key is to think with your head. Give a very simple example, such as memorizing words. If you just browse or copy aimlessly, it may take many times to remember, and it is not easy to remember. But if you can give full play to your imagination and use the method of association to remember, you can often remember quickly and not easily forget.
Nowadays, the method of memorizing English words quickly introduced in many books also emphasizes the role of brain association. It can be seen that if we can concentrate 7 times and give full play to the potential of the brain, the learning effect will definitely be greatly improved.
Another important factor affecting learning efficiency is people's mood. I think everyone has had this time.
3.50 Applying scientific common sense in life
The magic of vinegar is 1. Vinegar is an essential seasoning for family cooking.
Add two drops of white wine and a little salt to vinegar to make fragrant vinegar. In cook the meat or potato, adding a small amount of vinegar will make it easy to stew and taste good.
Adding vinegar when cooking sweet porridge can make sweet porridge sweeter. 2. When polishing shoes, a drop of vinegar can make shoes shine for a long time: use copper and aluminum utensils to restore luster after polishing with vinegar; 20 minutes before killing chickens and ducks, pour a spoonful of vinegar on the chickens and ducks, and pluck the hair easily.
3. The paint on the glass is softened with vinegar and wiped off; After washing the silk, soak it in clear water and a little vinegar for a few minutes, and it will be as bright as new after drying; The ground polished by woolen clothes should be wiped with 50% vinegar water, and then ironed with a wet cloth, and the bright spots can be eliminated. 4. vinegar can also be used for disinfection and sterilization.
Cold dishes mixed with vinegar, refreshing; Fumigating rooms with vinegar can sterilize and prevent influenza; Use 40% vinegar aqueous solution every day and wash your hair after heating to prevent hair loss and dandruff; Mix carboniferous ash powder with vinegar and apply it to armpit twice a day to cure body odor. Wonderful use of eggshell 1. The mixture of egg white and water in fresh eggshells can be used to clean glass or furniture, which can increase luster.
2. Put the broken egg shell and vinegar together in a bottle with dirt and shake it vigorously to remove the dirt. 3. Putting the eggshell with white or yellow eggs on the periphery of the planting hole of the flower tree can provide a lot of nutrition for the roots of the flower tree and promote the growth of the flower tree.
4. Eggshell is rich in calcium. If it is ground into powder and mixed into the feed of chickens or pigs, hens will not lay soft-shelled eggs after eating it, and pigs will grow well after eating tendons and bones. The knowledge of putting monosodium glutamate is sauerkraut. Never put essence, such as sweet and sour fish, sweet and sour ribs and so on.
Because the essence is alkaline, such as adding alkaline essence to sauerkraut, it is chemically neutral, but on the contrary, it produces salt and water, which will also make a delicious dish go away. Can it be added to alkaline food? Practice has proved that the flavor essence in alkaline food, its disodium glutamine, will also lose its umami flavor with the same sample.
Therefore, the essence should be placed in unknown food, both acidic and alkaline. Essence should also pay attention to the salinity of Italian food.
If the fruit is too salty, the sodium ions in the salt cover the sodium acid, and the umami taste can't be eaten; If the fruit is too light, the taste is thin and fresh. Finally, pay attention to the temperature.
The solubility of essence is 85 degrees. Below this temperature, the fragrance structure has not been decomposed, while above this temperature, it is not suitable for putting essence, otherwise there will be no umami flavor.
Distinguish the advantages and disadvantages of honey. Light-colored honey is better. Honey is a good honey because it contains many white particles and crystals and contains more glucose.
Honey water is extremely thin, its capacity is easy to flow, and its fragrance is not strong, but it can be mixed with water. Fill a small spoon with honey. The dripping honey is broken and will quickly shrink into the spoon.
It shows strong toughness and is a good honey. Put a spoonful of honey in the cup and add four to five times of hot water to dissolve it.
If there is no precipitation after standing for three to four hours, it is pure honey and good honey. Among bee honey, loquat honey is the best, followed by purple stone honey, pear honey, cauliflower honey, and buckwheat honey is the worst.
In addition, some honey sold in the market is mixed with water or other impurities, which can be identified by the following methods. Distinguish between mixing honey with water and sucrose: drop honey on white paper or toilet paper. If the honey on the paper gradually oozes out, it means that sucrose and water are mixed together.
Honey mixed with precipitation powder: put a small amount of honey into a cup, add appropriate amount of water, boil, and drop a few drops of iodine after cooling. If the color of the fruit juice turns blue, it means that it is mixed with precipitated powder. Honey mixed with impurities in different areas: insert red-hot iron wire into honey. If there is a sticky substance on the wire, it means that it is mixed with impurities; If the wire is still smooth, it means there are no impurities.
The wonderful use of beer 1. Dilute flour with beer. When poured on sliced or shredded meat, the fried meat is fresh and tender, especially when beef is cooked in this way, the effect is better.
2. Beer can add delicacy to cold tea. Soak vegetables in beer and cook them. When the wine boils, take it out and add some flavoring.
3. Mix some beer in the water when mixing dough, and the baked pancakes are crisp and fragrant. 4. Knead a proper amount of beer into the dough of the baked dough bag. Bread is easy to bake and tastes close to meat.
5. When cooking fat meat or fat fish, add a glass of beer to get rid of the greasy taste, and it tastes good. 6. Put the chicken to be cooked in salt, pepper and beer and soak it for 1~2 hours to remove the fishy smell of the chicken.
If you want to distinguish between true and false flavors, it is not difficult to distinguish between true and false monosodium glutamate. You can take a small amount of essence and put it on the tip of your tongue.
If the tongue feels cold and tastes delicious and fishy, it is qualified; If it tastes bitter and salty and has no fishy smell, it means that this essence is mixed with edible salt; If you feel cold, slippery, sticky and difficult to dissolve after tasting, mix it with gypsum powder or wood potato powder. Cleverly remove the dirt on the inner wall of the teacup. After a period of use, a layer of dark yellow sediment will be firmly attached to the inner wall, which is formed by the combination of insoluble egg white substances and pigments in tea. Using vitamin C tablets can effectively remove them: less warm water is allowed in the cup, and several vitamin C tablets are crushed and put into the cup.
After stirring, soak the inner wall with water solution. Then, put your finger on the vitamin C tablet and gently rub the inner wall to remove the scale.
In addition, wiping the cup wall with toothpaste can also remove tea stains. Choose tea 1. Look at uniformity.
Pour the tea leaves into the tea tray and rotate the tea tray in a fixed direction.
4. Life Tips Use scientific knowledge
Small science in life 1. How to detoxify vegetables After most pesticides are sprayed, they will be decomposed by enzymes in plants within a certain number of days. Buy fruits and vegetables for a few days to decompose the residual poison, but if you keep them in the refrigerator for a long time, it will not have such an effect, because the temperature of the refrigerator will inhibit the activity of enzymes in fruits and vegetables and cannot decompose the residual poison. Just put them in a cool place indoors, but they are not. 2. Clean the green pepper after removing the pedicle. When cleaning green pepper, most people are used to cutting it in half or washing it directly, which is actually inaccurate, because the unique shape and growth posture of green pepper make the sprayed pesticides accumulate on the sunken fruit pedicle! Put the vinegar on the kitchen floor first. Grease easily accumulates on the kitchen floor. Before mopping the floor, isn't it like pouring some vinegar on the mop to let the oil escape! 4. Tin foil barbecue without lemon. If you barbecue fish and meat with tin foil, don't bake it with acidic fruits such as lemon! Because tin foil paper belongs to metal, when metal and acidic substances are mixed and baked, chemical changes will occur, which is easy to produce carcinogens harmful to people! 5. When eating barbecue with lemon detoxification barbecue, if the meat is placed directly on the meat rack, in addition to being thoroughly roasted, the burnt part should be thrown away to avoid eating carcinogens! Remember to drop fresh lemon juice before eating. VitC in lemon not only increases flavor, but also has detoxification effect. 6. Lemon bath makes skin whiter. Lemon is in production and the price is not expensive. Not often. Cut it in half and squeeze it into juice on weekdays, add cold boiled water and some sugar to drink! Don't throw away the lemon peel for the time being and put it in the bathroom. No matter how you wash your face and take a bath, your skin will be younger and whiter! 7. Toothpaste will remove the film. Grapes are cleaner. When eating grapes, first cut them to the roots with scissors, let them keep intact particles, and soak them in diluted salt water to achieve sterilization effect. After washing the noodles, there is a white film. You can squeeze some toothpaste, put the grapes in your palm, rub them gently, and rinse them with water, and they will be completely crystal clear and feel more at ease! 8. Children @ @} Children at home are prone to picky eaters, which often leads to constipation! Instead of mixing a spoonful of brown sugar with 100 cc warm water, stir it evenly, let the children drink it slowly, and then gently * * * it clockwise like a stomach. Soon, the child can defecate smoothly! 9. Brown sugar can remove menstrual lochia. Menstruation is coming. Two days before the end, you can use half a catty of brown sugar (that is, brown sugar) to soak in boiling water (both hot and cold) to make tea, which can clear the lochia in the uterus! It is the simplest health care method for women! 10. When the hair dryer easily goes to the label to buy a gift box for people, the price label is difficult to tear off, and the black and dirty ones dug by hand are even more ugly. If you blow it with a hair dryer and then tear it off, it will be easily torn off without leaving a trace! 1 1. Adding white vinegar to clean water can prolong the life of flowers. In hot summer, flowers are easy to wither after buying home, unlike adding a few drops of white vinegar or bleach to clear water, pruning the bottom of flower branches can prolong the life of flowers! 12. Soaking tea leaves in water can remove foot odor. Many people suffer from foot odor. Here are several ways, unlike trying: put a little tea directly in your shoes when you wear it! Put warm water in the washbasin, put a little tea in it, and then soak your feet for a while, and it will be tasteless! 13. Fax Paper When the fax paper on the stick surface is used up, the paper stick is thinner than the stick wrapped with plastic wrap and can be used as a stick surface. After washing, when you need to stick your face, tear off the plastic wrap with a layer of plastic wrap, which is clean and convenient! 14. Termites have nowhere to escape after adding water to the windowsill. At night or later, some unknown bugs often break into the house. When you find termite invasion, don't hesitate to pour some water on the window rail. So termites can't invade. The reason is very simple, because termites can't move when they touch water, and those without wings can't stay in water for a long time, and because termites on window rails don't need to be removed. Cool! 15. The label of frozen bamboo chopsticks is easy to remove except when buying fresh bamboo chopsticks. It will be dirty if you dig by hand. If you put it in the freezer first and then tear it, it will be easy to take it out! 16. stainless steel pot boiled pineapple peel stainless steel pot is prone to black dirt, which is difficult to scrub. Now just add water to the larger pot at home, put some pineapple peel in it, put all the smaller pots in it, cook for 20 minutes, and take it out when it's cold. It's as bright as new! 17. Boil onions to remove burnt marks. If aluminum pot is burnt, put an onion and a little water in the pot to boil, and soon all burnt objects will float! 18.*** Wear more durable women's clothes after being chilled. Buy them newly. Don't unpack, just put it in the refrigerator for a day or two, and then take it out for another day. This can increase the toughness of * * * and prevent it from rotating or cracking quickly, so you don't have to spend too much money to buy it! 19. Only when the new flowerpot is soaked in water can the new porcelain flowerpot that has not been soaked in water be used for planting flowers. The flowerpot will suck up the water in the soil, leading to the death of flowers and plants! The new flowerpot should be soaked in cold water for 20 minutes before use, and then planted with flowers and plants will not die! 20. Adding lemon to the water dispenser can remove the residue of the teapot at home. The water dispenser has been used for a long time, and there is a layer of white residue inside. At this time, it's not like buying a lemon in the market, removing seeds, cutting it in half and cooking it in a water dispenser or teapot for two or three hours. You will find that there is less residue in it. Try a few more times, and you will have a satisfactory result! 2 1. A hair dryer helps to remove dirt from your face. Most people don't know that hair dryers have many wonderful functions besides drying their hair? For example, artificial flowers for home decoration are covered with dust after a period of time and cannot be cleaned with clean water, but they can be easily completed by blowing them carefully with a hair dryer! For example, after taking a shower, the fog permeates the bathroom, and the mirror is bound to be ugly. If you want to blow dry your hair, you can lift the hair dryer to remove the fog! For example, the numb ears, hands and feet when riding a motorcycle in winter can be quickly relieved by the hot air of a hair dryer! For example, when washing your face, pick up the hair dryer and gently blow it on your face from a distance to open your pores and clean it more thoroughly! 22. Know the toxic plastic bag skillfully: Touch the plastic bag with your hands, it will be toxic if it feels sticky, but it will be non-toxic if it feels lubricated; Shake hard, the sound is dull and toxic, and crisp and non-toxic. 23. Clean the water dispenser with lemon. Tips for life: adding lemon to the water dispenser can remove dirt! The water dispenser has been used for a long time, and there is a layer inside.