1. The scariest position of the roller coaster is the last row, not the first row. Because when the roller coaster climbed the high slope, the last row was still climbing, but the speed of the roller coaster was not fast at this time. When the last row reached the apex, the roller coaster rushed down and accelerated as a whole, so the first row was only the second half, and it was the last row that really impacted the whole process from the apex.

2. The ID card of the penultimate man is odd, and that of the woman is even.

3. The sun-dried quilt can't be photographed: Because the quilt made of cotton or synthetic fiber is in a stretched state after being sun-dried, it is easy to cause the fiber to be deformed, broken and unrecoverable by beating hard.

4. How much foam has nothing to do with cleaning power.

5. Hair "Taste" People's hair is mainly composed of protein. If decomposed, 20 amino acids can be obtained. These amino acids can be used as chemical seasoning or soup base, which tastes good.

6. The "dirtiest" daily necessities in life are razors, and the toilets are the cleanest. A study shows that the bacteria content of shaver is as high as 6.5438+0.2 million /cm2, which is the highest, followed by 300,000 masks, 250,000 toothbrushes and only 6.5438+0.2 million toilets, which is the lowest.

7. Hot water can put out the fire better than cold water.

8. Lighters are the precursors of matches. The lighter was invented in16th century, and the fire color was invented in18th century.

9. Standing is more tiring than walking. When people stand, their legs always bear the weight of the whole body, while when people walk, their legs are stressed alternately.

10. If you are afraid of cold, sleep naked. Research shows that when you sleep with clothes on, the temperature in the quilt remains unchanged, while when you sleep naked, because the quilt has a "warm and hot" effect compared with clothes, the temperature of the quilt will rise after the hot air of human body temperature is absorbed by the quilt.

People are more likely to believe what they whisper.

12. Small hole in plastic bench

This is for the convenience of transportation: if there is no hole in the middle of the chair, it is difficult to fold more chairs tightly. Similarly, if the chairs overlap, a closed space will be formed between them. If the hole is not ventilated, it will be difficult to open it with all the strength of the flood.

2. What cold knowledge in life stumped 99.9% people?

In our daily life, there are many things that we come into contact with almost every day, but many times we may never notice their existence or even their real use. Now let's tell you something about these cold knowledge.

I believe many people are curious about what the small hole in the chair is for. It was originally for the convenience of transportation. If there is no hole in the middle of the chair, it is difficult to fold it tightly. Similarly, if the chairs overlap, a closed space will be formed between them. If you don't have this breathing hole, it's hard to open it with all your strength! Why do chairs have to have round holes? If there is a pointed hole in the middle of the chair, it is easy to crack under stress. In addition, the size of the round hole is also required. Too large a hole will affect the whole chair structure. The hole is too small to reach easily. It is inconvenient for Xiong Haizi to accidentally get stuck. Do you know what the nails on jeans are for? This is used to strengthen the firmness of pants. Because these joints are easy to crack, adding a few small nails can avoid tearing at the joints. Many people don't use the blue part when using an eraser, because the handwriting of a pencil can't be erased! In fact, people use it to remove pen handwriting. Take a closer look and you will find a picture of a pen! Have you noticed that there is also a small hole at the top of the box ruler? When the nail or screw is hooked into the small hole, it can stabilize the nail or screw, prevent the tape from sliding and facilitate measurement. Perhaps most people think that small holes in shoes are used for ventilation, which is wrong. Its function is to further tighten shoes through shoelaces, but people generally don't use them. Everyone knows only a little about the small hole in the pot. First, it is convenient to hang the pot. Second, it can put a spoon, which is really dual-purpose. This small hole in the lock exists for two reasons. First, it can prevent the lock core from rusting due to accumulated water in the lock. Second, through this small hole, oil can be dripped and lubricated, which is convenient to use. There are small bumps on the keyboards of computers F and J, which is convenient for us to put our fingers in the right position without looking down at the keyboards all the time. The dot on the back of Apple's mobile phone is the speaker when using the rear camera. Yes, it's not useless. When the blade of the art knife is worn and unusable, you can take off the tail, jam the front blade and break the blade, so that the blade becomes extremely sharp again. Other knives can also use this method. Take off the small plastic cover inside and the bottle can be tightened. Why do you want this thing? But the function of this small cover is really important. It plays a sealing role. Only by putting the liquid and carbon dioxide in its drink into the bottle cap will it not leak out, otherwise, hehe, is there any drink? The newly bought ointment cover will have spikes to help you pierce the protective film of the ointment; Generally, drinks are bought with a lid, and three small protrusions on the lid are used to catch cups; You never noticed? I don't know why there is a small pit on the lid of the candy box. It turns out that it is convenient to pour out candy one by one, so as not to pour too much at once; How many people use plastic wrap to poke the small seals on both sides of plastic wrap? Small holes are dug along the indicator line for the newly opened plastic wrap, so that it is not necessary to take out the plastic wrap completely, and the hygiene of the unused parts is also guaranteed. Every time you drink soda, the straw will float. This small hole can stabilize the straw, so you don't have to worry that the straw will float again. There is such an indentation on the bottom of the red wine bottle. It was originally designed to balance the pressure on the bottle when opening the cork. Because the sides and bottom of the bottle are very fragile, these dents can evenly distribute the pressure on the cork inside the bottle. I don't know if you have found the small air holes in the plane window, but they are actually useful. One is to balance the air pressure, which can reduce the air pressure difference inside and outside the cabin when the plane rises to the flying height, and the other is to prevent the window glass from fogging. After reading so much cold knowledge, do you feel that your common sense of life has made a qualitative leap?

3. Ten Cold Knowledge in Life

1. The paper stick made of fax paper is thinner than the stick made of 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!

2, barbecue, if the meat is placed directly on the meat rack, in addition to being thoroughly roasted, the burnt part should be discarded to avoid eating carcinogens! Remember to drop fresh lemon juice before eating. VitC in lemon not only adds flavor, but also has detoxification effect!

3. 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 base!

4. In hot summer, flowers are easy to wither after being bought back, 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!

5. stainless steel pot is easily stained with black dirt, which is difficult to scrub. Now just add water to the larger pot at home, put some pineapple peel, put all the smaller pots in, cook for 20 minutes, and take them out when they are cool, and they are as bright as new!

6. A new porcelain flowerpot that has not been soaked in water is used to grow flowers. The flowerpot will suck up the water in the soil, causing flowers and plants to die! The new flowerpot should be soaked in cold water for 20 minutes before use, and then planted with flowers and plants will not die!

7. If the refrigerator and rice cooker at home are all white, if they turn yellow after a long time, don't try squeezing some toothpaste, and gently scrub them when cleaning, which will make you unexpectedly white.

8. When the milk is too late to drink, you can put a rag in it to soak the table and floor, and the dirt will be removed soon!

9. Chewed gum, don't throw it away in a hurry, it can be used to clean stamps! Press it flat and stick it on the stamp surface. Soft rubber can stretch freely, completely stick to dirt, and can also remove dirt when it is taken off, keeping the surface of stamps clean and clearly covered!

10, when taking a bath, if you have a wound on your body, it will hurt when you touch water, and it will become inflamed if you are not careful. At this time, you can apply oily substances on the wound, such as cream, to isolate water, and it won't hurt!

4. Examples of cold knowledge

With the continuous development of life, cold knowledge changes with each passing day. Today's cold knowledge is not just worthless knowledge. Not only enriched their knowledge, but also solved some small troubles in life.

For example, chocolate is fatal to dogs. Just a few ounces can kill a puppy, because the heart and nervous system are damaged.

There are actually more bacteria in your keyboard than in the horse bucket;

Before drinking, eating more animal viscera can reduce the degree of drunkenness;

Among 50 people, the probability that at least two people have the same birthday is 97%;

The Oscars awarded during World War II were made of wood, because metal was scarce at that time.

Wrigley gum is the first product with a bar code.

You can't keep your eyes open when sneezing;

Sleeping consumes more calories than watching TV;

"The quick brown fox jumps over the lazy dog" uses all the letters in English;

If all China people walk in front of you in a row, because the birth rate is high, this line will never end;

1 1 1， 1 1， 1 1 x 1 1 1， 1 1 1 1 1， 1 1， 1 165438

The chameleon's tongue is twice as long as its own body;

The hair of smart people contains more zinc and copper;

The only domestic animal not mentioned in the Bible is the cat;

Urine is very beautiful and colorful under the microscope;

In Britain, suicide is a very serious crime, and the maximum penalty is death.

. There are two women named Patricia in America who have the same social security number because of a computer error. When they were called to correct their mistakes, they found that they were both born in March 194 13, married in June 1959, and were June 19 and 265438 respectively.

1893, Henry Seagland broke up with his girlfriend. My girlfriend was heartbroken and committed suicide. Her brother blamed Henry for his sister's death and shot him. At the right moment, the gun hit the tree next to him. Twenty years later, Henry decided to blow up the tree. The explosion shot a bullet into Henry's head.

On February 5th, a ship sank in the Dover Strait. There was only one survivor named Hugh Williams. 1767 On the same day, another ship sank in the same waters, with only one survivor, also called Hugh Williams. 1820 On August 8th, a picnic boat capsized in the Thames, with only one survivor, also called Hugh Williams. 1940, a British ship was bombed by a German mine, and only two survivors were named Hugh Williams.

1996, a car accident occurred in France, and both drivers died. After investigation, it was found that the two were husband and wife. The police thought it was murder at first, but later found that the two had been separated for several months;

1965, 4-year-old Roger Lausel was in danger while swimming and almost drowned. A woman named Alice Blaise saved him. 1974, Rogge swam there again. He saved a man, and that man was Alice Blaise's husband;

At the end of World War I, Sanford, a British knight, fought on the battlefield and was unfortunately struck by lightning, resulting in total disability from the waist down. Six years later, he moved to Canada. Once he was struck by lightning while fishing, and his right side was disabled. In the summer after two years of recovery, he went to the park and was struck by lightning again, paralyzed. He died two years later. Just four years after his death, lightning broke his tombstone;

A businessman gave a speech in South Africa entitled "Be careful, because death can take you away at any time". After the speech, he put mints in his mouth and choked to death.

5. Some interesting knowledge about life.

1. Mosquitoes have just finished sucking blood. Put some soap on the red place and it won't itch. I always do!

2. Peel off the red skin of raw peanuts, break it in a fresh-keeping bag, and then brush it on your teeth for three minutes, and your yellow teeth will turn white!

3. If the clothes are accidentally stained with ballpoint pen marks and ink, you can smear alcohol on the stains and clean them after a few rubs. If there is no alcohol, you can use toilet water instead.

4. After brushing your teeth, dip a dry cloth in lemon juice and wipe the stained parts of your teeth, which will give you unexpected and excellent results.

5. When the cooking is burnt, turn off the fire first, then cover the rice with a crust and a pot cover. After 5 minutes, the foreskin will absorb the burning smell.

6, scissors become dull, you can find a waste can, cut a few times with scissors, scissors will become very sharp.

7. There will be a lot of stains when the water dispenser is used for a long time. Cut the fresh lemon in half to remove the seeds, put it in the water dispenser and plug it in for two or three hours to remove the stains inside.

8. Clothes are always covered with a lot of fluff. You can dip a sponge in water and wring it out, and then wipe the surface of clothes to easily remove the fluff on the surface.

9. The ink in the newspaper can repel mosquitoes. Put a layer of newspaper under the wardrobe to put clothes to prevent bugs from running into the wardrobe and hurting clothes.

10, you can't sleep in bed with your head covered in winter, which will lead to more and more carbon dioxide and unclean gases in your body. After waking up, you won't feel energetic, but you will feel groggy and exhausted.

6. Ten Cold Knowledge in Life

1. The paper stick made of fax paper is thinner than the stick made of 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! 2, barbecue, if the meat is placed directly on the meat rack, in addition to being thoroughly roasted, the burnt part should be discarded to avoid eating carcinogens! Remember to drop fresh lemon juice before eating. VitC in lemon not only adds flavor, but also has detoxification effect! 3. 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 base! 4. In hot summer, flowers are easy to wither after being bought back, 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! 5. stainless steel pot is easily stained with black dirt, which is difficult to scrub. Now just add water to the larger pot at home, put some pineapple peel, put all the smaller pots in, cook for 20 minutes, and take them out when they are cool, and they are as bright as new! 6. A new porcelain flowerpot that has not been soaked in water is used to grow flowers. The flowerpot will suck up the water in the soil, causing flowers and plants to die! The new flowerpot should be soaked in cold water for 20 minutes before use, and then planted with flowers and plants will not die! 7. If the refrigerator and rice cooker at home are all white, if they turn yellow after a long time, don't try squeezing some toothpaste, and gently scrub them when cleaning, which will make you unexpectedly white.

8. When the milk is too late to drink, you can put a rag in it to soak the table and floor, and the dirt will be removed soon! 9. Chewed gum, don't throw it away in a hurry, it can be used to clean stamps! Press it flat and stick it on the stamp surface. Soft rubber can stretch freely, completely stick to dirt, and can also remove dirt when it is taken off, keeping the surface of stamps clean and clearly covered! 10, when taking a bath, if you have a wound on your body, it will hurt when you touch water, and it will become inflamed if you are not careful. At this time, you can apply oily substances, such as ointment, to the wound and isolate it from water, so that it won't hurt.

7. What is the cold knowledge in life?

1) Eggs with shells must not be cooked in the microwave oven. It won't explode when it is cooked, and it will explode only after it is taken out. The ceiling wall is full of broken eggs, which will burn when touching the skin!

2) Porcelain that can't be used in the microwave oven can't be put in the microwave oven, otherwise its temperature will rise very high and burn your hands!

3) Vitamin E can help the growth of cells and cancer cells and should not be misused.

4) Digital cameras can't shoot the sun, and strong light will damage its parts.

5) Some skin care products are slightly sweet because they contain glycerol. Glycerol absorbs moisture in the air to make the skin moist and soft, but it also absorbs moisture in the skin, making the skin actually dry.

Are those above useful? There is still a lot to write. The most important thing is that you pay more attention to and think about what you see every day, gradually accumulate more and become practical in life.

8. Common sense of daily life

1, the hair dryer blows at the label, and the label can be easily torn off as soon as the glue of the trademark is hot.

If you are afraid of wrinkling when traveling with clothes, you can roll up every piece of clothes. 3. Apply some toothpaste evenly on the collar and cuffs, brush lightly with a brush, and then rinse with clear water to remove stains.

4. The cuff or collar of the sweater will lose its elasticity. You can soak the cuff or collar in hot water for 20 minutes, and then dry it to recover. Jeans fade easily when washed. Soak in cold brine for about 2 hours before washing, and then wash with soap.

6. Some clothes also fade easily under the action of sunlight. When hanging clothes, you can turn it upside down. The sun is inside the clothes and the shade is outside. 7. 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! 8. Tin foil barbecue without lemon. If fish and meat are grilled with tin foil, don't bake sour fruits such as lemon together! 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! 9. 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 also be thrown away to avoid eating carcinogens! Remember to drop fresh lemon juice before eating. VitC in lemon not only adds flavor, but also has detoxification effect! 10. 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! 1 1. Grapes are cleaner. When eating grapes, first take scissors to cut off the roots and keep the whole grain, and soak it in diluted salt water to achieve the sterilization effect. After washing, there is a white film on the surface. Squeeze some toothpaste, put the grapes in the palm of your hand, gently knead them, and then rinse them with water, and they will be completely crystal clear and more comfortable to eat! 12. Children drink sugar water to prevent constipation. 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 will be able to defecate smoothly! 13. 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) as tea, which can clear the lochia in the uterus! It is the simplest health care method for women! 14. When the hair dryer easily removes 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! 15. Adding white vinegar to clean water can prolong the life of flowers in hot summer. Flowers are easy to wither after being bought back, 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! 16. Soaking tea 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 put your feet in it for a while, so it has no taste.

9. Life unpopular knowledge

Very cold and unpopular knowledge: six tricks to detoxify the body 1 clearing the lungs: eat more apples, pectin and antioxidants in apple peel can reduce the inflammatory reaction in the lungs. 2 Evergreen: eat more fruits such as bananas and eat more coarse grains.

3 clear stomach: do not stay up late; Eat less sweet, salty, spicy, sour and cold food. 4 Qinggan: Exercise every day 10 minutes.

5 clear gallbladder: eat more high-fiber foods such as celery, whole grains and sweet potatoes. Eat less cholesterol-rich foods such as animal viscera and egg yolk.

6 Clearing kidney: Eat less salt and drink more water. @ 丫丫丫丫丫丫丫丫丫丫丫: The number of people who died of sudden food suffocation in the world is more than the number of people who died of shooting, plane crash, electric shock and lightning combined. I risk my life to eat every day! Cold knowledge of dealing with roll call: make a fist with your right hand and remember things quickly. Researchers at the University of Toledo, Ohio, found that the simple physical action of "making a fist with your right hand" can temporarily change the way the brain works, thus improving memory.

When remembering things, you can make a fist with your right hand to help you remember; When you recall something, you might as well make a fist with your left hand, which will make you remember it faster. Students preparing for the exam, very cold and unpopular knowledge: the legendary "worry-free girl" is actually a day lily that divides the time (24-hour clock) by 2 with a watch, and the pointer of the number is aimed at the direction of the sun, so the direction of 12 is the north.

For example, at 2 o'clock in the afternoon, that is, 14 o'clock, divide by 2 to get 7, and aim the position of 7 o'clock at the direction of the sun, then the direction of 12 is the north. 15 small method to ensure that you are not sleepy for a day 1. Exercise for 5 minutes after getting up; 2. Develop the habit of drinking water; 3. Pay attention to eating breakfast; 4. Add meals at ten o'clock; 5. Drink coffee in the afternoon; 6. Talk more and relieve more; 7. Sit in a sitting position; 8. Zhang Chi configuration; 9. Stand up and answer the phone; 10. Singing while taking a shower; 1 1. Make optimistic friends; 12. Roll with the punches; 13. Exercise the back; 14. Meditation; 15. Exercise every day.

The more you laugh, the happier you are. American scholars Huck and Chelner made a study based on the smiling face of graduation photo, a college student, and followed it for 30 years. It is found that women with sincere smiles have a high overall happiness level and a lasting marriage.

Beauty and happiness have nothing to do with lasting marriage. Why do songs go back and forth in my head? Almost everyone has experienced the phenomenon that a piece of music keeps repeating in their minds and can't get rid of it. This phenomenon is called otozoa.

Scientists call this feeling caused by ear worms cognitive itching, which makes people want to scratch. Earworm is common, but it is basically harmless unless you really don't want to listen to that song.

Very cold, very cold, unpopular knowledge: life is cold knowledge: farting wildly in a taxi can reduce the chance of being driven long distances by unscrupulous drivers. Cold and unpopular knowledge: you will be late for work, but you can't find the key.

The most annoying thing is that when you rummage around, you often pick up the key you are looking for and throw it away without realizing it or turning a blind eye. The scientific explanation is that the information processing speed of each system involved in the brain is different when completing this task, and the function of identifying gender seems to be behind the army.

Memories and feelings can be "washed away" in daily life, and people are often troubled by their feelings, either fear or pain. Is there any way to get rid of bad mood? The answer is amazing: yes! Scientists in the United States and Canada have carried out related experiments. The successful use of chemicals made mice forget what they had learned before and their memories, that is, drugs hindered the formation of protein needed for memory storage.

Facts have proved that "brainwashing" can be achieved, but further research is needed. Once this technology is mature, human beings can erase the terrible or unpleasant past from their minds at any time, thus avoiding mental illness that may result from it.

Are you looking forward to it? (Home WeChat: lengzhishi520) Is yawning "contagious"? Sometimes, when a person yawns, people around him will also yawn, and yawning will also be "contagious"? In one experiment, psychologists showed volunteers videos of yawning. The results showed that more than 40% of the volunteers were "infected", and 60% of them yawned more than once. This shows that yawning is really contagious, and it is more likely to happen to people who feel the same way, that is, those who like to impersonate others.

What is thunder? First of all, the word "thunder" here is a verb, which means taking the initiative to attack and punish, including thunder in the sky. "Five" means five elements, representing five substances: gold, wood, water, fire and earth.

Therefore, the five thunder means golden thunder, wooden thunder, mine thunder, fire thunder and earth thunder. Golden thunder refers to swords, metals, ironware, car accidents and so on.

Wood thunder refers to sticks, falling from a height, holding down trees and so on. Fire thunder refers to fire, electric shock, lightning strike, etc.

Mine refers to drowning, flood, walking accident, illness and so on. Soil mines refer to soil burial, house collapse, falling objects from high places and so on.

From this, it can be seen that the combination of body blow is bound to be powerful, so people use "body blow" to describe the punishment for those who endanger heaven and earth. Salty in the morning and sweet at night can clear the intestines and nourish the stomach. The way to keep healthy is to drink a cup of light salt water in the morning and a cup of honey water in the evening.

It can clear the intestines, nourish the stomach, moisten the lungs and beautify the face. Traditional Chinese medicine believes that salting into the kidney meridian can maintain people's spirit for a day. Drinking honey at night has a two-way regulating effect on gastric juice secretion, which can increase gastric acid secretion to help digestion, inhibit gastric juice secretion, neutralize gastric acid, protect gastric mucosa and nourish stomach.

Eating pears after meals can excrete a lot of carcinogens in the body. Researchers have found that eating a pear or drinking a cup of hot pear juice after a meal can discharge a lot of carcinogens accumulated in the human body. The survey results show that polycyclic aromatic hydrocarbons (PAHs), which are strong carcinogens, will be significantly reduced after eating pears, especially after drinking heated pear juice.

Eat a pear after dinner! What exactly does good food mean? When it comes to delicacies, people will naturally think that delicacies are the collective name of rare and precious foods in Shan Ye and the ocean, and they are the essence of food, so they have always regarded delicacies as synonymous with food. In fact, delicacies have specific meanings and can be divided into eight treasures.