Life tips 1, nosebleeds, please pat your forehead gently with cold water for immediate effect.
You can only eat four eggs a week. Eating too much is bad for your health.
3, chicken * * * contains carcinogens, it is best not to eat. Eating fruit after meals is a wrong concept, and it should be eating fruit before meals.
5, when women come to menstruation, don't drink green tea, anyway, don't drink tea, eat more things that can replenish blood. 6. Don't add eggs and sugar to drink soybean milk, and don't drink too much.
7, don't eat tomatoes on an empty stomach, it is best to eat after meals. 8. When you wake up in the morning, drink a glass of water first to prevent stones.
9. Don't eat three hours before going to bed, you will get fat. 10, drink less milk tea
Because it is high in calories and oil, it has no nutritional value. Long-term drinking is prone to diseases such as hypertension and diabetes.
1 1, freshly baked bread is not suitable for immediate consumption. 12, away from the charging stand.
The human body should be away from more than 30 cm, and should not be placed beside the bed. 13, drink eight glasses of water every day.
14, drink more water, and bladder cancer will not come. 15, drink more water during the day and drink less water at night.
16, don't drink more than two cups of coffee every day. Drinking too much can easily lead to insomnia and stomachache. 17, eat less greasy food, because digestion takes 5-7 hours, and the blood in the brain is concentrated in the stomach, which makes you sleepy.
18, eat less big meals after five o'clock in the afternoon, because the body doesn't need so much energy after five o'clock. 19, 10 Food types that will make you happy: deep-sea fish, bananas, grapefruit, whole wheat bread, spinach, garlic, pumpkin, low-fat milk, chicken and cherries.
20, lack of sleep will become stupid, be sure to sleep eight hours a day, and you will not get old if you have a nap habit. 2 1, the best sleep time is 10 at night to 6 am.
22. Don't drink more than one glass a day, because alcohol will inhibit antibody-producing B cells and increase the chance of bacterial infection. 23, taking capsules should be swallowed in cold water (you can eat first), take the medicine 30 minutes before going to bed, and avoid lying down immediately after taking the medicine.
24, sour plum has anti-aging effect. 25, hair loss factors: staying up late, stress, alcohol and tobacco, spicy, greasy food, etc.
26, help hair growth: eat more cabbage, eggs, beans; Eat less sweets (especially fructose). 27, a glass of lemon juice and orange juice every day, not only can whiten but also fade dark spots.
28. Apple will always be a good medicine for motorcyclists, addicts and housewives. Eating only one apple a day can give you a clean lung. 29. Smoking and taking vitamins (a vitamin B carotene -A) can lead to cancer. Quitting smoking as soon as possible is the healthiest way.
30. Women should not drink tea in five periods: menstrual period, pregnancy, pre-labor, post-labor and menopause. Smoking is related to lung cancer, lip cancer, tongue cancer, laryngeal cancer, esophageal cancer and bladder cancer.
32. Drinking alcohol leads to cirrhosis and liver cancer. 33, eat areca can lead to oral fibrosis, easy to get oral cancer.
34, food is too fine, lack of fiber, contains a lot of fat, especially cholesterol can cause intestinal cancer. 35. When the food is too rough and the nutrition is insufficient, it will lead to esophageal cancer and gastric cancer.
36. Aflatoxin and nitrite in food are carcinogenic. 37. Don't smoke and refuse to smoke secondhand smoke.
38. Drink moderately, don't spell wine, and don't get drunk. 39. Reduce the intake of salted, smoked and grilled foods.
40. Eat fresh vegetables and fruits every day. 4 1. Eat grains and beans rich in fiber every day.
42. Eat a balanced diet every day, but don't overdo it. 43. Maintain an ideal weight, but not fat.
44. Keep a regular life and exercise. 45. Keep a relaxed and happy mood.
46. Correct eating habits: Eat like an emperor in the morning, like a civilian at noon, and like a beggar at night. Learn five ways to clean carpet stains. 1.
Brush with a brush dipped in concentrated salt solution for several times; Cotton yarn can also be used to remove high-purity gasoline. 2. Fruit juice traces.
You can soak the stain with 80% ammonia solution, and then brush it off with a brush dipped in ammonia solution. 3. Ink.
You can sprinkle some fine salt powder in the dirty place and then brush it off with wet soapy water; Old ink stains should be soaked in fresh milk, and then washed repeatedly with a brush dipped in fresh milk. 4. Fruit wine and beer.
Wipe with cotton yarn or soft cloth dipped in warm washing powder solution, and then clean with warm water and a small amount of edible vinegar solution. 5. Oil stains on animals and plants.
Soak cotton yarn in high-purity gasoline and wipe it repeatedly; You can also use detergent to brush. Three ways to clean the range hood quickly The range hood is a good helper in the modern family kitchen, but how to clean the range hood often makes the family nervous. Here are three simple cleaning methods: 1. Pressure cooker steam washing method.
Boil the cold water in the pressure cooker. When the steam is continuously discharged, take the low-pressure valve, turn on the range hood, and aim the steam water column at the rotating blades. As high-temperature steam continuously rushes into the fan blades and other parts, oily sewage will flow into the waste oil cup along the way until there is no oil in the oil cup. 2. Soaking with detergent and vinegar.
Remove the oil smoke extraction impeller, soak it in warm pot water mixed with 3-5 drops of detergent and 50 ml of vinegar for 10-20 minutes, and then scrub it with a clean rag. The shell and other parts are also cleaned with this solution.
This method has no damage to human skin and no corrosion to equipment, and the surface still maintains its original luster after cleaning. 3. Soap surface coating method.
Make soap into paste, and then smear it on the surface of impeller and other devices. After the range hood is used for a period of time, remove the impeller and other devices and wipe it with a rag, and the oil will fall off.
2. Ask some questions and answers.
(a) The stars are the sun, ()
(2) There is no gravity over the earth's atmosphere ()
(3) A meteor is a star that is expelled from the sky from its original position. ( )
(4) The total solar eclipse can only happen when the moon is full in May. ( )
(5) Aurora is formed by charged particles radiated by the sun. ( )
(6) The dark area on Mars is the ancient seabed with many plants. ( )
(7) Meteorites usually fall during storms. ( )
(8) The Star of Bethlehem has been confirmed as Halley's Comet. ( )
(9) The earth is closer to the sun in June+10 than in July in 5438. ( )
On a clear night, there are about three million stars visible to the naked eye. ( )
February is the month when the new moon is not seen in a year. ( )
There are Beethoven, Chopin, Goethe and Ibsen on Mercury. ( )
Reference answer:
(1) Yes. The sun is a typical representative of stars, and it is a kind of self-luminous body that can radiate hot gas, which is completely different from the planets that glow by themselves under the earth.
(2) No, gravity gradually weakens with the increase of distance from the earth. Theoretically, the area of gravity is infinite. The moon can't leave us because of the pull of gravity.
(3) No, meteors are the phenomenon of trailing light produced when material particles from space burn over the earth's atmosphere.
(4) no. A total solar eclipse in which the sun is completely covered by the moon can only occur at the beginning of the month. At that time, the earth, the moon and the sun were on a line, and the moon was in the middle. We can only see the dark side of the moon.
(5) Yes. Some particles from the sun fall into the upper atmosphere of the earth like a waterfall. Because the particles are charged and attracted to the earth's magnetic pole, extremely bright aurora can be seen in the high latitudes of the earth.
(6) No, after the launch of Mariner 4 in 1965, it has been made clear that the dark areas on Mars are not all concave, but some are plateaus. Just because the color is dark doesn't mean it's full of organic creatures.
(7) No, there is no necessary connection between them. Storms are purely meteorological changes, and large rocks, metals and other meteorites come from space outside the earth's atmosphere.
(8) No, Halley's Comet revolves around the sun for 76 years, and it existed at least 7 years before the birth of Jesus. Samuel's Notes: A Detailed Introduction to the Star of Bethlehem.
(9) Yes. The nearest distance between the earth and the sun is about 6.5438+48 million kilometers. The division of seasons is mainly based on the inclination of the earth's rotation axis, not on our distance from the sun.
(10) No. The number of stars visible to the naked eye is about 5800, but a person can only see more than 2500 at most; The stars visible in the other hemisphere and the stars close to the horizon are blurred and difficult to enter the line of sight.
(1 1) Yes, the interval between two crescent moons is 29.5 days. There are only 28 days in February, and even in leap year, I am only 29 years old, so I can't watch it.
(12) Yes. Are craters (or craters) of Mercury.
Ostation.lamost/bootes/bbs/archive/o_t/t_38439/ Corp.
3. Common sense of life Children's intelligence problems
1. There are 9 goldfish in the fish tank. When you look closer, two of them are dead. How many goldfish are there in the fish tank? Grandpa Wang has three sons, all married. How many sons does Grandpa Wang have? There are 7 lights on in the room. Turn off three lights. How many lights are there in the room? 4. Father and son play chess with five sets each. How many games did they play? There are two colors (red and yellow) on the five-star red flag. 10 How many colors are there on the five-star red flag? 6. What is the name of the book Interesting Mathematics? 7. It takes two minutes for one person to sing the song Learn from Lei Feng, and at least a few minutes for three people to sing the song Learn from Lei Feng. 8. It takes 8 minutes for mom to cook one egg, and at least several minutes for mom to cook three eggs. 9. It takes 1 second to strike a match, and at least a few seconds to strike four matches. 10.3 people played checkers for 3 hours. How many hours did everyone play? 1 1. Three horses pulled a cart and ran forward for 6 meters. How many meters does each Ma Xiangqian run? 12. A teacher went to a student's house and saw three girls standing in front of her mother. She asked, "Do you only have these three daughters?" Mother said, "Not only these three, but each of them has a brother."
How many children are there in this family? 13. Three birds landed on the tree and the hunter shot down one. How many are there in the tree? 14. Three birds landed on the beach, and the hunter shot and killed one. How many birds are there on the beach? 15. Three flies landed on the flat, and someone killed one. How many flies are there on the table? 16. Three waterfowl landed on the river, and the hunter shot and killed one. How many people are still alive on the river at the moment? 17. Xiaoming is practicing running on the circular track. There are three people in front of him and three people behind him. How many people are practicing running? 18. Xiaoming's family has four brothers, four younger brothers and no nine brothers. How many brothers are there in his family? 19. 1+ 1 When is it not equal to 2? = = = = = = = = = = = = = = = = = = Answer: 1.9.
2.3 (Married son or his son). 3.7 Lighting (turn off the lights or turn on the lights).
4.5 discs. 5. Red and yellow.
6. It's called interesting math. 7.2 minutes, chorus.
8.8 minutes, cook together. 9. 1 sec, together.
10.3 hours (because of three people). 11.6m.
12.4, 1, brother and three sisters. 13.0, because the other two birds scared away when they heard the gunshots.
14. 1, "dead". 15. 1, "dead".
16.0 only, "one death and two flights". 17.3+1= 4,4 people. This question can be drawn to help students understand 18.5 people. Note: This question is similar to "Xiao Ming has four brothers and four younger brothers. How many brothers are there in his family? " Ask different questions.
19. A case miscalculated is not equal to 2; On the other hand, in "binary", "1+ 1= 10".
4. Who has a comprehensive understanding of daily life?
Tips for life tips for daily life 1, washing clothes neckline: sprinkle some salt powder on the neckline, gently rub it, and wash away the salt with water.
Because human sweat contains protein, it is insoluble in water, but can be quickly dissolved in salt. 2, make the toothbrush durable: soak the newly bought toothbrush in hot salt water for about half an hour and take it out, which can make the toothbrush durable.
3, egg white adhesion and small porcelain, glass: If the small porcelain and glass are broken, you can cover the two broken surfaces with egg white, wipe off the excess egg white around after sewing, and after half an hour, the broken parts can be completely adhered. After standing for a day or two, it will be rubbed by a large external force, and the adhesion will not break.
4. Pots, cups, cups and other porcelain with tea stains, oil stains and water stains can be removed by soaking lemon belt residue with juice in a bowl of warm water for 4 or 5 hours. Washing with vinegar and salt can also be very clean.
The Mid-Autumn Festival is coming. Here is some food. 1, fry fish without touching the pan: wash the pan, dry it, heat it, then put oil in it, and then turn it over to make it full of oil.
You don't touch the pot when frying fish. 2. Save frying steamed bread: first prepare a bowl of cold water, slice the steamed bread, soak the steamed bread slices in water when frying, and immediately put them into the pot for frying, so that the fried steamed bread is golden in color, tender outside, delicious and fuel-efficient.
3. Identify the quality of canned food. After cooking, the water in the can becomes steam, and after sealing and cooling, the steam condenses into water. The air in the tank becomes thinner, and the external atmosphere collapses the top of the tank. So the top of a good can is not flat, but slightly concave. If the food in the can goes bad and produces gas, the top will protrude. 4, old photos become new: photos are old or dirty, wipe with cotton dipped in alcohol, it will be the same as brand new.
5, glasses anti-fog: when it is cold, glasses are easy to fog when they are hot, making people see things. You can wipe both sides of the lens with semi-dry soapy soil and then wipe it evenly.
In this way, even if you take a bath in the bathroom, the lens will not fog. How to quickly untie the tangled necklace * * * You can sprinkle some talcum powder first and start to untie it.
The chain is smooth because of talcum powder, and it is easy to separate no matter how tightly it is wrapped. * * * Ways to prevent the bath water from getting cold * * * When taking a bath in winter, the water is easy to get cold. You can add a little salt to the bathtub.
Salt can temporarily block the sweat line, so the heat in the body will not be emitted. * * * How to eliminate the cracks on the plate * * * You can put the plate in a pot, pour in milk and heat it for four to five minutes. After the milk is boiled, you can turn off the fire and take out the plate, and the cracks almost disappear.
* * * Moisture-proof methods for biscuits * * * When the biscuits are canned, put a cube of sugar at the same time. Because the sugar cube will absorb the water in the jar, it can keep the biscuits crisp and delicious.
* * * Ways to prevent the noodle soup from overflowing * * * When cooking, add cream or a little salad oil to the soup. At the same time, keep the soup boiling, and do not add cold water when cooking other noodles.
* * * How to remove the smoke stains on your fingers * * * The most effective way is to scrub with lemon juice. At first, the effect is not obvious, but after patiently wiping, the color will gradually fade. If it still doesn't work, you can add a little hydrogen peroxide to the lemon juice and the effect will come out.
* * * How to restore the shrunk sweater to its original state * * * Inject warm water into the washbasin, drop a small amount of household ammonia water, and then soak the sweater, and the soap left on the wool will dissolve. Gently stretch the narrowed part with both hands at the same time, and then rinse it to dryness.
When it is half dry, first open it by hand, straighten it, and iron it with an iron to restore its original size. * * * How to remove the furniture marks on the carpet * * * Eliminate the common dent marks on the carpet. Try spraying steam into the dent with a competitive iron, or spread a wet towel in the dent and iron it.
Then use a hard toothbrush to stir up the hair in the recess, and then brush it gently. * * * Enzyme-containing laundry detergent can't use hot water * * * Enzyme-containing laundry detergent is the most effective for protein dirt produced by the body, but protein will deteriorate and stick to the cloth when heated.
Even if it is enzyme laundry detergent, there is nothing we can do. So the water temperature is still limited to 30 to 60 degrees.
* * * How to prevent sweaters from shrinking * * * The principle of washing sweaters is that the sooner you wash them, the better. Generally speaking, the less laundry detergent is used, the easier it is for sweaters to shrink, so it's best to add more laundry detergent to prevent sweaters from getting smaller.
* * * How to make transparent and clear ice cubes * * * is to fully boil the water and pour it into the ice maker. Because of this, impurities such as lime in water can be evaporated, and the ice cubes made will be particularly transparent.
* * * The secret of making a vase durable in summer * * * You can drop a drop or two of bleach into the vase. Bleaching water has the function of disinfecting fruits. Although the water temperature is high, it can also make the incision of the flower stem difficult to breed bacteria, and the flower is naturally more durable.
* * * Ways to make a room fragrant without leaving fragrance * * * You can use your own perfume, wet it with cotton, and then wipe the indoor light bulbs. When the light bulb is on, the perfume will be warm and the whole room will smell. * * * Method of restoring withered fruits and vegetables * * * You can put water in a big pot, add a small amount of vinegar and two cubes of sugar, then soak the vegetables, rinse them with hot water, and then rinse them with cold water immediately to restore their original state.
* * * Easily remove the wrinkles caused by clothes stuffed in the suitcase * * * When you travel abroad and open the suitcase, your clothes will become wrinkled. After taking a hot bath, you can leave the water in the bathtub and hang your clothes in the bathroom with a hanger. Rosty Yi, wrinkles on clothes can be removed by steam.
* * * The secret of removing sweat stains on shirt collar and armpit * * * Apply shampoo with a brush first, or apply shaving cream and let it stand for four or five minutes before washing, and you can wash it smoothly. * * * The secret of making * * * more durable * * * In order to prevent * * * from being disconnected, you can put a new * * * in the freezer.
If it's frozen hard, just take it out and thaw it naturally, and then put it on and it will go offline. In addition, you can also add a fifth cup of vinegar to wash it first, or wash it with a spoonful of dissolved sugar, and the effect is also good.
* * * Remedial measures for fading of black clothes *** 1. If it is cotton, add a little beer to wash it. 2. If it is wool, wash it with boiled spinach juice to see how to prevent the white silk shirt from turning yellow. Before washing, coat it with milk. This will magically prevent yellowing.
It is also effective to add some milk after washing and give it a final rinse. This method doesn't need a lot of milk, so try it.
5. Ask 100 questions+answers to primary school science knowledge.
Primary school students' scientific knowledge 1. Rabbits beat the ground with their legs to send messages. Most of them beat the ground with their hind legs, which is a way for them to express their feelings to the female rabbits.
2. The biggest monkey in the world is a baboon and the smallest monkey is a bonobo. 3. The real name of "Four Elephants" is Elk, which is a rare animal in China.
4. Why does sorbet get angry? The reason why sorbet bubbles is because there is a lot of invisible water vapor in the outside air. When it comes to cold sorbet, it will liquefy into droplets when it is cold. It seems that the sorbet is bubbling. 5. Why do sunflowers always face the sun? Sunflower stems contain a wonderful auxin.
This auxin is very afraid of light. When it is illuminated, it will go to the backlight side, and the cells on the backlight side will multiply rapidly. Therefore, the backlit side will grow faster than the bright side, which will bend the sunflower to light.
6. Why do cicadas shed their skin? Cicada's shell (exoskeleton) is hard and can't expand with the growth of cicada. When the cicada grows to a certain stage, the cicada's exoskeleton restricts its growth, and the cicada loses its original exoskeleton, which is cicada slough. 7. How do bees make honey? First, the bees spit the sweet juice of the flowers they picked into an empty hive. At night, they suck sweet juice into their honey stomachs to make it, and then spit it out and swallow it. It takes 100~240 times to make sweet honey.
8. Why do the stars twinkle? We see the stars shining, not because the luminosity of the stars has changed, but because of the occlusion of the atmosphere. The atmosphere is between us and the stars. When starlight passes through the atmosphere, it will be affected by the density and thickness of the atmosphere.
The atmosphere is not absolutely transparent, and its transparency will change according to its density. So when we look at the stars through it on the ground, we will see that the stars seem to be flashing.
9. Why do people yawn? When we feel tired, a lot of carbon dioxide has been produced in our bodies. When there is too much carbon dioxide, oxygen must be supplemented to balance the needs of the body.
Because these residual carbon dioxide will affect our body's functional activities, then the body will send out a protective reaction, so we yawn. Yawning is a deep breathing action, which will let us breathe in more oxygen and expel more carbon dioxide than usual, and it can also eliminate fatigue.
10, why can a snake walk without feet? Snakes have many scales, which are the outermost armor on their bodies. Scales are not only used to protect the body, but also to be their "feet".
When a snake crawls forward, its body will be S-shaped. Every scale outside the S-shape will tilt upward to help the snake catch the uneven road when it moves forward.
These scales cooperate with the snake's muscles and can push the body forward, so the snake can walk without feet! 1 1. Why does hair turn white when people get old? There is a substance called melanin in our hair. The more melanin, the darker our hair will be. Without melanin, hair will turn yellow or white.
When human beings reach old age, various functions of the body will gradually decline, and the formation of pigments will be less and less, so the hair will gradually turn white! 12. Why do fireflies glow? Fireflies emit light because there is a luminous body at the end of their abdomen, which is filled with a lot of phosphorus-containing luminescent substances and luminescent enzymes, so that fireflies can emit flashing light. The purpose of fireflies is not only lighting, but also courtship, vigilance and trapping.
This is also a communication tool for them. Different kinds of fireflies emit light in different ways, frequencies and colors, so they can convey different information. 13. Why do you growl when you are hungry? When you are hungry, you will purr. This is because the food you have eaten before has almost been digested. Although the stomach is empty, the gastric juice in the stomach will continue to secrete.
At this time, the contraction of the stomach will gradually expand, and the liquid and gas inside will be stirred up and purr. Don't be embarrassed by your stomach growling next time! Because this is a normal physiological action.
14. Why can't ostriches fly? A giant ostrich, but they can't fly into the sky! This is not because their wings are useless, but because their feathers are too soft and their wings are too small to fly at all. In addition, the ostrich's muscles are underdeveloped and its sternum is flat, which is not conducive to flying.
Ostriches live in Africa. Because they have lived in desert areas for a long time, their bodies gradually evolved into what they are now in order to adapt to the environment. 15. Why can't the food in cans go bad easily? Lunch meat, black bean shad, tomato sauce beans.
They are all delicious canned food, which can be preserved for a long time without deterioration.
This is because the can is sealed, so bacteria can't enter. When people make canned food, they pump all the air out of the canned food and then seal it.
In the absence of air, even if the food inside is contaminated with a little bacteria, they can't survive or reproduce! 16. Why does the baby cry all the time when it is born? Babies cry when they are born, not because they are unhappy, but because they are taking the first breath of air! When babies leave their mother's body and are born, the first breath of air will rush to their throats, violently impact the vocal cords, make them vibrate, and then make a sound similar to crying. 17. Why do lizards keep bouncing backwards when their tails are broken? In order to protect themselves, many lizards also protect their eyes and ears; When some lizards are attacked, their tails will be broken due to the severe contraction of their muscles.
Because there are still some nerves alive in the broken tail, it will keep bouncing, thus distracting the enemy and running away. Don't think that their lives will end like this. In fact, it only takes a few months, and their tails will grow back and move on.
18. Why is the squirrel's tail so big? Don't look at the relaxed mouse tail! When the squirrel jumps around the tree, its tail plays a great role. It can keep balance when the squirrel jumps to the tree to avoid falling and being injured.
In addition, this big tail can play a more protective role in winter, tightly surrounding the squirrel's body, which is convenient and practical. 19, why can't a human thumb have one or three knots? Ordinary people have five fingers.
6. What are the interesting math problems and answers in primary schools?
1. Find the perimeter of an acute triangle by clever reasoning. The lengths of the three sides of an acute triangle are two digits respectively and are three consecutive even numbers. The sum of their unit numbers is a multiple of 7. What is the longest circumference of this triangle? Answer: The three sides of a triangle are three consecutive even numbers, so their unit digits can only be 0, 2, 4, 6, 8, their sum is even, and their unit digits are even.
2. Adults and children eat 100 steamed buns, 100 people eat, 1 adults eat 3, and 3 children eat 1. How many adults and children can just finish eating? Answer: 25 adults and 75 children. 3. The number of steps is 6. The number of steps that Xiaoming climbs every day is a fraction of that of his colleagues who live and work on the sixth floor.
The key here is that people who live on the first floor don't need to climb stairs. If you want to go to the third floor, you need to climb two steps instead of three. If you want to go to the sixth floor, you need to climb five steps instead of six.
The answer is two fifths. 4. Cats, chickens and rice crossed the river. A man crossed the river with cats, chickens and rice. Besides being rowed, a boat can also carry at least one of cats, chickens and rice. When people are away, cats should eat chickens and chickens should eat rice.
Try to design a safe ferry scheme and minimize the number of ferries. Answer: 1) bring the chicken back empty-handed; 2) bring the cat back empty-handed; 3) bring the rice back empty-handed; 4) bring the chicken back empty-handed; 5. There are ten bags of apples in each bag, and any bag is equally heavy; It is known that all nine bags of apples weigh 50 grams, and only one bag weighs 45 grams.
At present, there is only one rod to weigh, and it is required to weigh only once, so I found the bag of apples with 45g in it and asked how to weigh the answer: first, number the ten bags of apples as 1 and 2.
10, and take out the same number of apples from each bag and weigh them once. If it is a multiple of 50, it is package 10. Otherwise, the difference of 5 grams is the No.9 bag and the difference of 2 grams is the No.8 bag. 6. The sum of numbers is a two-digit number. The sum of the tenth digit and the fourth digit is 10. If the positions of these two digits are exchanged, the number obtained is 36 less than the original number. What are the original two digits? Tip: A two-digit number is exchanged with the tenth digit number to get a new two-digit number. The difference between the original number and the new number must be a multiple of 9. This difference divided by 9 is one digit and ten digits.
Here is 36÷9=4, which means that the difference between the original digit and the decimal digit is 4 (greatly reduced), and their sum is 10, so the problem becomes a sum-difference problem. The original number was 73.
7. Rectangles A and B are two rectangles with equal perimeters. The aspect ratio of A is 3:2, and that of B is 3:5. What are the areas of A and B? Answer: A is 24, 16 and B is 15 and 25. The area of A is 384, and the area of B is 375.
The answer is not unique.
7. Fill in the blanks with daily life knowledge
1. Drug abuse is very harmful to human body. When people are poisoned by drugs, they will be unconscious and paralyzed. In severe cases, people will be in a coma, breathing difficulties and die.
2. Not spitting can avoid spreading diseases, and it is also an important symbol to measure the degree of social civilization. 3. After long-term physical exercise and physical labor, the contractility of respiratory muscles can be strengthened, the range of chest activities can be expanded, and the number of alveoli involved in gas exchange can be increased.
Oxygen is indispensable for human life activities, and normal breathing ensures the human body's demand for oxygen. But in some cases (such as drowning and gas poisoning), it is very dangerous to make people stop breathing.
Mouth-to-mouth blowing is a simple and easy method to treat patients with respiratory arrest, but attention should be paid to the following problems: the operator should face the patient horizontally, hold the patient's back neck with one hand, hold the patient's nostril tightly with the other hand, and blow into the patient's mouth, with the blowing amount being half of the deep breathing.
8. Fill in the blanks with daily life knowledge
1. Drug abuse is very harmful to human body. When people are poisoned by drugs, they will be unconscious and paralyzed. In severe cases, people will be in a coma, breathing difficulties and die.
2. Not spitting can avoid spreading diseases, and it is also an important symbol to measure the degree of social civilization.
3. After long-term physical exercise and physical labor, the contractility of respiratory muscles can be strengthened, the range of chest activities can be expanded, and the number of alveoli involved in gas exchange can be increased.
Oxygen is indispensable for human life activities, and normal breathing ensures the human body's demand for oxygen. But in some cases (such as drowning and gas poisoning), it is very dangerous to make people stop breathing. Mouth-to-mouth blowing is a simple and easy method to treat patients with respiratory arrest, but attention should be paid to the following problems: the operator should face the patient horizontally, hold the patient's back neck with one hand, hold the patient's nostril tightly with the other hand, and blow into the patient's mouth, with the blowing amount being half of the deep breathing.