1. Questions and answers about daily life tips
Life tips 1. If you have nosebleeds, gently apply cold water to your forehead. The effect will be immediate.
2. You can only eat four eggs a week. Eating too much is bad for your health.
3. Chicken *** contains carcinogens, so it is best not to eat it. 4. It is a wrong concept to eat fruits after meals. You should eat fruits before meals.
5. Women should not drink green tea when they are menstruating. Just don’t drink tea anyway. Eat more things that can replenish blood. 6. Don’t add eggs and sugar when drinking soy milk, and don’t drink too much.
7. Do not eat tomatoes on an empty stomach. It is best to eat them 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, otherwise you will gain weight. 10. Drink less milk tea.
Because it is high in calories, high in oil and has no nutritional value at all. Long-term consumption may lead to high blood pressure, diabetes and other diseases.
11. Freshly baked bread should not be eaten immediately. 12. Stay away from the charging base.
The human body should be kept more than 30 centimeters away and should not be placed next to 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 less water at night.
16. Don’t drink more than two cups of coffee a day. Drinking too much can easily lead to insomnia and stomachache. 17. Eat less fatty food, because it takes 5-7 hours to digest and concentrates the blood in the brain to the intestines and stomach, making it easy to feel drowsy.
18. After five o'clock in the afternoon, eat less big meals because the body does not need so much energy after five o'clock. 19. 10 foods that will make you happy when you eat them: deep-sea fish, bananas, grapefruits, whole wheat bread, spinach, garlic, pumpkin, low-fat milk, chicken, and cherries.
20. Lack of sleep will make you stupid. You must ensure eight hours of sleep a day. If you have a nap habit, you will not age. 21. The best time to sleep is between 10 pm and 6 am.
22. Don’t drink more than one drink a day, because alcohol inhibits B cells that produce antibodies and increases the chance of bacterial infection. 23. When taking capsules, you should swallow them with cold water (you can take them first). Take the medicine 30 minutes before going to bed. Do not lie down immediately after taking the medicine.
24. Sour plum has anti-aging effect. 25. Factors for hair loss: staying up late, stress, tobacco and alcohol, spicy, greasy food, etc.
26. Help hair growth: Eat more cabbage, eggs, and beans; eat less sweets (especially fructose). 27. A glass of lemon juice or orange juice every day can not only whiten your skin but also lighten dark spots.
28. Apples are a common medicine for bikers, drug addicts, and housewives. Only one apple a day can keep your lungs clean. 29. Smoking and taking vitamins (B-carotene-a type of vitamin A) can cause cancer. Quitting smoking as soon as possible is the healthiest way.
30. There are five periods when women should not drink tea: menstruation, pregnancy, before delivery, after delivery, and menopause. 31. Smoking is most closely related to lung cancer, lip cancer, tongue cancer, laryngeal cancer, esophageal cancer, and bladder cancer.
32. Drinking alcohol can lead to cirrhosis of the liver and liver cancer. 33. Eating betel nut can cause oral fibrosis and easily lead to oral cancer.
34. Food that is too refined, lacks fiber, and contains a lot of fat, especially cholesterol, can cause intestinal cancer. 35. Too rough food and insufficient nutrition can lead to esophageal cancer and gastric cancer.
36. Aflatoxins and nitrites in food are carcinogenic. 37. Don’t smoke and refuse second-hand smoke.
38. Drink alcohol in moderation, do not overdo it or get drunk. 39. Reduce the consumption of salted, smoked, and barbecued foods.
40. Eat fresh vegetables and fruits every day. 41. Eat high-fiber cereals and legumes every day.
42. Eat a balanced diet every day, but not too much. 43. Maintain your ideal weight and not be overweight.
44. Maintain a regular life and exercise. 45. Keep a relaxed and happy mood.
46. Correct eating habits: eat like an emperor in the morning, eat like a commoner at noon, and eat like a beggar in the evening. Life Tips Five ways to remove carpet stains 1. Oil smoke stains.
Use a brush dipped in concentrated salt water to scrub it several times; you can also use cotton gauze to get higher purity gasoline to remove it. 2. Fruit juice stains.
You can use 80% ammonia solution to soak the stain, and then use a brush to dip in the ammonia solution and brush it away. 3. Ink marks.
You can sprinkle some fine salt powder on the stained area, and then scrub it away with wet soapy water. For old ink marks, it is best to soak them with fresh milk, and then use a brush dipped in fresh milk to scrub repeatedly. 4. Fruit wine and beer stains.
First use cotton gauze or a soft cloth dipped in warm detergent solution to wipe it, and then clean it with warm water and a small amount of vinegar solution. 5. Animal and plant oil stains.
Dip cotton gauze in gasoline with higher purity and wipe it repeatedly; you can also use detergent to wipe it. Three methods to quickly clean the range hood. The range hood is a good helper in the modern family kitchen, but how to clean the range hood often makes families troubled. Here are three simple cleaning methods: 1. Pressure cooker steam flushing method.
Boil the cold water in the pressure cooker. When the steam is continuously discharged, remove the pressure limiting valve, open the range hood, and aim the steam water column at the rotating fan blade. Because the high-temperature hot water steam continues to rush into the fan blade, etc. components, the oily wastewater will flow into the waste oil cup until there is no oil in the oil cup. 2. Dishwashing liquid and vinegar soaking method.
Remove the range hood impeller and soak it in a basin of warm water mixed with 3--5 drops of dishwashing liquid and 50 ml of vinegar. Soak for 10--20 minutes before using. Scrub with a clean rag. The casing and other parts are also cleaned with this solution.
This method has no damage to human skin, no corrosion to the device, and the surface still maintains its original luster after cleaning. 3. Apply soap liquid to the surface.
Make soap into a paste, and then apply it on the surface of the impeller and other devices. After the range hood has been used for a period of time, remove the impeller and other devices, wipe it with a rag, and the oil stain will fall off.
2. Looking for some knowledge questions and answers
(1) The stars are all the sun, ( )
(2) There is no center of the earth above the earth’s atmosphere Gravity ( )
(3) A meteor is a star that is expelled from its original position in the sky. ( )
(4) A total solar eclipse is only possible on the 15th full moon. ( )
(5) Aurora is formed by charged particles radiated by the sun. ( )
(6) The dark area on Mars is an ancient seafloor covered with vegetation. ( )
(7) Meteorites usually fall during storms. ( )
(8) "Berle's star" has been confirmed to be Halley's comet. ( )
(9) The earth is closer to the sun in January than in July. ( )
(10) On a clear dark night, about three million stars can be seen with the naked eye. ( )
(11) The month of the year when the crescent moon may not be visible is February. ( )
(12) There are also Beethoven, Chopin, Goethe and Ibsen on Mercury. ( )
Reference answer:
(1) Yes. The sun is a typical representative of a star, a self-luminous body that radiates hot gas, which is completely different from other planets such as the Earth that emit light by themselves.
(2) No. The force of gravity gradually weakens as the distance from the Earth's surface increases. Theoretically, the gravitational field is infinite. The reason why the moon does not leave us is because of the pull of gravity.
(3) No. Meteors are tracers that occur when particles of material from space burn above the Earth's atmosphere.
(4) No. A total solar eclipse occurs when the sun is completely covered by the moon and can only occur at the beginning of the month.
At that time, the earth, moon and sun were aligned, and the moon was between them. All we could see was the dark side of the moon.
(5) Yes. Some particles from the sun cascade into the Earth's upper atmosphere. Because the particles are electrically charged, they are attracted to the geomagnetic poles, and unusually bright aurora can be seen in high latitudes of the Earth.
(6) No. After the launch of the Mariner 4 space probe in 1965, it was discovered that not all dark areas on Mars are depressions, but some are plateaus; dark colors do not mean that they are full of organic life.
(7) No. There is no necessary connection between the two. Storms are purely meteorological, while meteorites, such as large rocks and metals, come from space beyond the Earth's atmosphere.
(8) No. Halley's comet takes seventy-six years to orbit the sun in an elliptical orbit, and it existed at least seven years before Jesus was born. samuel's note: Detailed introduction to the Star of Bethlehem
(9) Yes. The Earth's closest distance to the Sun is approximately 148.0 million kilometers. The division of seasons is mainly based on the tilt of the earth's axis of rotation, not based on our distance from the sun.
(10) No. The number of stars visible to the naked eye is around 5,800, but one person can only see more than 2,500 at most. The stars visible in the other hemisphere and those close to the horizon have blurred light and are extremely difficult to enter the line of sight.
(11) Yes, the interval between two Emei crescent moons is 29.5 days. February only has 28 days, and even in a leap year it only has 29 days, so it is impossible to see.
(12) Yes. They are all craters (or impact craters) on Mercury.
co *** ostation.lamost/bootes/bbs/archive/o_t/t_38439/
3. Common sense children’s puzzles
1. In the fish tank There are 9 goldfish. When I get closer, two of them are dead. How many goldfish are there in the tank at this time? 2. Grandpa Wang *** has three sons who are all married. How many sons does Grandpa Wang have? 3. There are 7 lights on in the house and 3 are turned off. How many lights are left in the house? 4. A father and son are playing chess against each other. Each has played five games. How many games have they played? 5. There are two colors (red and yellow) on one five-star red flag. How many colors are there on 10 five-star red flags? 6. What is the name of the book "Fun Mathematics"? 7. It takes 2 minutes for one person to sing the song "Learn from Lei Feng". How many minutes does it take at least three people to sing the song "Learn from Lei Feng"? 8. It takes 8 minutes for mom to cook one egg. How many minutes does it take to cook three eggs? 9. It takes 1 second to strike a match. How many seconds does it take to strike 4 matches? 10. Three people played checkers together for 3 hours. How many hours did each person play? 11. Three horses pulled a cart forward 6 meters. How many meters did each horse run forward? 12. A teacher visited a student's home and saw three girls in front of her mother, so she asked: "Do you only have these three daughters?" The mother said: "More than these three, each of them has an older brother. ”
How many children does this *** have? 13. Three birds fell on the tree. The hunter shot down one. How many were left on the tree? 14. Three birds fell on the beach. The hunter shot and killed one. How many birds were left on the beach? 15. Three flies fell on the flat table. Someone killed one. How many flies are still on the table? 16. Three waterfowl fell on the river. The hunter shot and killed one. How many are still alive on the river at this moment? 17. Xiao Ming is practicing running on the circular track. There are 3 people in front of him and 3 people behind him. Count, how many people are practicing running? 18. Xiao Ming’s family has 4 elder brothers and 4 younger brothers, but they are not 9 brothers. How many brothers are there in his family? 19.1 When does 1 not equal 2? ================================= Answers to the question: 1.9.
2.3 (the married son is still his son). 3.7 lights (the lights that are turned off are still lights).
4.5 disks.
5. Red and yellow colors.
6. It’s called “Fun Mathematics”. 7.2 minutes, chorus.
8.8 minutes, cook together. 9.1 seconds, row together.
10.3 hours (because three people combined). 11.6 meters.
12.4, the older one is his brother and the three younger ones are his sister. 13.0 birds, because the other two birds were frightened away by the sound of gunshots.
14.1, "dead". 15.1, "dead".
16.0 birds, "one dead and two flying". 17.3 1=4, 4 people. You can draw a picture to help students understand this question. 18.5 people. Note: This question is different from "Xiao Ming has 4 elder brothers and 4 younger brothers. How many brothers are there in his family?"
19. In one case, it is not equal to 2 when the calculation is wrong; in the other case, "1 1=10" in "binary".
4. Does anyone have a comprehensive collection of daily life tips?
Daily life tips 1. Wash the collar of clothes: Sprinkle some salt on the collar and rub it gently. Rinse with water to remove the salt.
Because human sweat contains protein, which cannot be dissolved in water, but can be quickly dissolved in table salt. 2. Make the toothbrush durable: Soak the newly purchased toothbrush in hot salt water for about half an hour and take it out to make the toothbrush durable.
3. Egg white sticks to small porcelain and glass products: If small porcelain and glass products are broken, you can use egg white to cover the two broken surfaces. After the seams are closed, wipe off the excess egg white around them. After half an hour, they will break. Parts can be completely glued. After being left for one or two days, even if it is rubbed by a large external force, the bonded part will not break.
4. If pots, cups, cups and other porcelain have tea stains, oil stains, water stains, etc., you can soak the juiced lemon peel in a bowl of warm water and leave it for 4 or 5 hours. Can be removed. A mixture of vinegar and salt can also be used to clean it.
The Mid-Autumn Festival is coming, here are the food categories. 1. Fry fish in a non-stick pan: Wash the pan, dry it, heat it, then add oil, and then turn the pan around so that there is oil everywhere in the pan.
When frying fish, it will not stick to the pan. 2. Save fried steamed buns: First prepare a bowl of cold water, slice the steamed buns, soak the steamed bun slices with water during frying, and immediately put them into the pot for frying. The fried steamed buns will be golden in color, yellow on the outside and tender on the inside, delicious and fuel-saving. .
3. Identify the quality of canned food. After cooking the canned food, the water in the food in the can turns into steam. After the can is sealed and cooled, the steam condenses into water. The air inside the can becomes thinner, and the outside atmosphere becomes thinner. Flatten the top of the can. Therefore, the top of a good can is not flat, but slightly concave. If the food in the can deteriorates and produces gas, the top will bulge out. 4. Old photos become new: If the photo is old or dirty, wipe it with cotton dipped in alcohol and it will look like brand new.
5. Anti-fog glasses: When the weather is cold, glasses lenses tend to fog up when heated, making it difficult for people to see. Use semi-dry soapy soil to wipe both sides of the lens, and then wipe evenly to shine.
Using this method, even if you take a shower in the bathroom, the lenses will not become foggy. How to quickly untie a tangled necklace*** You can sprinkle a little talcum powder on it first and then untie it.
The chain is made lubricated by talcum powder, so it can be easily separated no matter how tightly it is wrapped. ***Methods to prevent bath water from getting cold*** When taking a bath in winter, the water can easily become cold. You can add a little salt to the bathtub.
Salt has the effect of temporarily blocking sweat lines, so body heat will not be dissipated. ***How ??to eliminate cracks on a plate*** You can put the plate into a pot, pour milk, and heat it for four to five minutes. After the milk boils, turn off the heat and take out the plate, and the cracks will almost disappear.
***Moisture-proof method for biscuits*** When filling the biscuits into cans, put a piece of sugar cube in at the same time. Since the sugar cubes will absorb the moisture in the jar, the biscuits will stay crispy and delicious.
***Methods to prevent pasta soup from overflowing*** When boiling, add a little cream or a little salad oil to the soup.
At the same time, keep the soup boiling and do not add cold water to other noodles.
***How ??to remove soot on your fingers*** The most effective method is to scrub with lemon juice. The effect is not obvious at first, but after patiently wiping, the color will gradually fade away. If it still doesn't work, you can add a little hydrogen peroxide to lemon juice and the effect will come out.
***Method to restore a shrunken sweater to its original shape*** Pour warm water into the basin, add a small amount of household ammonia water, and then immerse the sweater, leaving the The soap ingredients will dissolve. Gently stretch the reduced part with both hands at the same time, then rinse and dry.
When it is semi-dry, pull it apart with your hands to get the original shape, then iron it with an iron to restore it to its original size. ***How ??to remove furniture marks from carpet*** To eliminate common depression marks on carpet, try using a steam iron to spray some steam into the depression, or lay a wet towel on the depression and then iron it with an iron.
Then use a hard-bristled toothbrush to pick up the hair in the recesses, and then gently brush it. ***Do not use hot water with enzyme-added laundry detergents*** Enzyme-containing laundry detergents are most effective against protein dirt produced by the body, but the proteins will deteriorate when exposed to heat and stick to the cloth.
Even though it is an enzyme laundry detergent, there is nothing you can do. Therefore, the upper limit of water temperature is still 30 to 60 degrees.
***How ??to prevent sweaters from shrinking*** The principle of washing sweaters is to wash them as quickly as possible. Generally speaking, the less detergent you use, the easier it is for your sweater to shrink, so it is better to add more detergent to prevent your sweater from shrinking.
***How ??to make clear and transparent ice cubes*** Just boil the water thoroughly and pour it into the ice maker. Because impurities such as lime in the water can be evaporated in this way, the ice cubes produced will be particularly transparent.
***The secret to making vase flowers last in summer*** You can put one or two drops of bleach in the vase. Bleach water has a bactericidal effect. Even if the water temperature is high, it can make the cuts on the flower stems less susceptible to bacteria, and the flowers will naturally last longer.
***How ??to make the house fragrant without using fragrance*** You can use your own perfume to wet the cotton with the perfume, and then wipe the light bulb in the room. When the light bulb is on, the perfume will warm up and the whole place will be warm. The room will be filled with fragrance. ***How ??to revive wilted fruits and vegetables*** You can fill a large basin with water, add a small amount of vinegar and two sugar cubes, then put the vegetables in and soak them, then rinse them with hot water. Then immediately flush it back with cold water to restore it to its original state.
***Easily remove wrinkles caused by clothes stuffed in suitcases*** When traveling, when you open the suitcase, the clothes become wrinkled. You can keep the water in the bathtub after taking a hot bath, and hang the clothes on hangers in the bathroom. The wrinkles on the clothes can be eliminated by the steam the next morning.
***Tips for removing sweat spots on shirt collars and armpits*** First apply shampoo or shaving cream with a brush and let it sit for four to five minutes before washing. Washes off smoothly. ***Tips for making hair last longer*** To prevent hair from going offline, place new hair in the freezer.
Once frozen, take it out and defrost it naturally, and it will be less likely to come off when you put it on. In addition, you can also add a fifth of a cup of vinegar to the water to wash it, or use a tablespoon of sugar to dissolve in the water. The effect is also good.
***Remedy for fading black clothes*** 1. If it is cotton, add a little beer to the water to rinse it. 2. If it is wool, wash it with boiled spinach juice. ***How ??to Prevent White Silk Shirts from Turning Yellow*** Before washing, apply milk on it. This will do wonders to prevent yellowing.
Adding some milk during the last rinse after washing will also have the same effect. This method doesn’t require a lot of milk, so give it a try.
5. Looking for answers to 100 basic science knowledge questions for primary school students
Little science knowledge for primary school students 1. Rabbits use their legs to slap the ground to convey information. Most of the rabbits that slap the ground with their hind legs are males. Rabbit, this is a way for it to express its affection to the female rabbit.
2. The largest monkey in the world is the baboon, and the smallest monkey is the tamarin. 3. The real name of the "four different elephants" is elk, which is a rare animal in my country.
4. Why does the sorbet steam? The reason why the ice cream steams is because there is a lot of invisible water vapor in the outside air. When it comes into contact with very cold ice cream, it will liquefy into mist droplets and surround the ice cream when it gets cold. It looks like the ice cream is "steaming". 5. Why do sunflowers always face the sun? The stems of sunflowers contain a wonderful auxin.
This auxin is very photophobic. When exposed to light, it will go to the backlit side, and at the same time, it will cause the cells on the backlit side to multiply rapidly. Therefore, the backlit side will grow faster than the light-facing side, causing the sunflower to develop a phototropic bend. .
6. Why do cicadas shed their skin? The cicada's outer shell (exoskeleton) is hard and cannot expand as the cicada grows. When the cicada grows to a certain stage, the cicada's exoskeleton limits the growth of the cicada. The cicada takes off its original exoskeleton, which is the process of shedding. . 7. How do bees make honey? The bee first vomits the sweet juice of the collected flowers into an empty hive. At night, it sucks the sweet juice into its honey stomach to prepare it, then spits it out, and then swallows it. In this way, it takes 100 times to spit out the sweet juice. ~240 times, finally it becomes sweet honey.
8. Why do stars twinkle? We see stars twinkling, not because of changes in the luminosity of the stars themselves, but because of the obstruction 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 depending on the density. So when we look at the stars through it on the ground, we will see that the stars seem to be twinkling.
9. Why do people yawn? When we feel tired, our bodies have produced a lot of carbon dioxide. When there is too much carbon dioxide, oxygen must be added to balance what the body needs.
Because these residual carbon dioxide will affect the functional activities of our body, the body will issue a protective response and yawn. Yawning is a deep breathing action, which allows us to take in more oxygen and expel carbon dioxide than usual, and also eliminates fatigue.
10. Why can snakes walk without legs? Snakes have many scales on their bodies, which are their outermost layer of armor. The scales are not only used to protect the body, but also serve as their "feet".
When a snake crawls forward, its body will form an S shape. Each scale on the outside of the S-shape will tilt up to help the snake grasp uneven roads as it moves forward.
These scales cooperate with the snake's muscles and can push the body forward, so the snake can move without legs! 11. Why does people’s hair turn gray as they get older? There is a substance called "melanin" in our hair. The more melanin, the darker the color of the hair. If there is less melanin, the hair will turn yellow or white.
When humans reach old age, various functions of the body will gradually decline, and the formation of pigment will become less and less, so the hair will gradually turn white! 12. Why do fireflies glow? Fireflies emit light because they have luminescent devices at the end of their abdomens. The luminescent devices are filled with many phosphorus-containing luminescent substances and luminescent enzymes, allowing fireflies to emit flashes of light. The purpose of fireflies' light is not only for lighting, but also for courtship, warning, and trapping.
This is also a tool for them to communicate. Different types of fireflies have different lighting methods, lighting frequencies and colors, and they use this to convey different messages. 13. Why does your stomach growl when you are hungry? Your stomach will growl when you are hungry. This is because the food you have eaten is almost finished digesting. Although your stomach is empty, gastric juice will continue to be secreted.
At this time, the contraction of the stomach will gradually expand, and the liquid and gas inside will stir up, causing a gurgling sound. Don’t be embarrassed by your stomach growling next time! Because this is a normal physiological action.
14. Why can’t ostriches fly? A type of giant ostrich bird, but they can't fly into the sky! This is not because their wings don't work, but because their feathers are too soft and their wings are too small, not suitable for flying at all. In addition, the muscles of the ostrich are underdeveloped and the sternum is flat, which is not helpful for flying.
Ostriches live in Africa. Since they have lived in desert areas for a long time, their bodies have gradually evolved into what they are today in order to adapt to the environment. 15. Why does food in cans not go bad easily? Luncheon meat, dace with black bean sauce, and beans in tomato sauce.
These are delicious canned foods that can be stored for a long time without spoiling easily.
This is because the can is sealed and bacteria cannot enter. When people make canned food, they take all the air out of the can and then seal it.
In the absence of air, even if the food inside is contaminated with a few bacteria, they cannot survive or reproduce! 16. Why do babies cry non-stop when they are born? Babies cry loudly when they are born. This is not because they are unhappy, but because they are taking their first breath of air! When a baby is born out of its mother's body, the first breath of air they inhale rushes to the throat, which violently impacts the vocal cords, causing them to vibrate and make a cry-like sound. 17. Why does the lizard still keep bouncing after its tail is broken off? In order to protect themselves, many lizards also use protective colors to hide their appearance. When some lizards are attacked, their tails will break off due to violent muscle contraction.
Because some of the nerves in the broken tail are still alive, it will continue to bounce, thus distracting the enemy so that they can escape. Don't think that their lives will end like this. In fact, it only takes a few months for their tails to grow back and continue their lives.
18. Why is the squirrel’s tail so big? Don't look at the squirrel's tail! While the squirrel is jumping up and down the tree, its tail is doing a great job. It allows the squirrel to balance when jumping on the tree and avoid falling and being injured.
In addition, this big tail can also play a protective role in winter, tightly surrounding the squirrel's body, which is both convenient and practical. 19. Why can’t people’s thumbs have one or three joints? The average person has five fingers.
6. What are the interesting mathematics questions and answers for primary school students?
1. Calculate the perimeter of an acute-angled triangle through clever reasoning. The lengths of the three sides of an acute-angled triangle are two digits each, and they are three consecutive even numbers. The sum of their ones digits is a multiple of 7. What is the longest perimeter of this triangle in centimeters? Answer: The three sides of the triangle are three consecutive even numbers, so their ones digits can only be 0, 2, and 4. , 6, 8, and their sum is also an even number, and the sum of their single digits is a multiple of 7, which can only be 14. The maximum possible sides of the triangle are 86, 88, 90, and the maximum circumference is 86 88 90 =264 cm.
2. Adults and children eat 100 buns. 100 people eat. One adult eats three buns, and three children eat one bun. How many adults and how many children can just finish the meal? Answer: 25 adults, 75 children 3. Number of steps The building where Xiao Ming works and lives is both on the 6th floor, while the floors where he works and lives are both on the 3rd floor. What fraction of the number of steps Xiao Ming climbs every day is that of his colleagues who live on the 6th floor and work on the 6th floor? Answer: Without thinking, it is easy to come to the conclusion of one-half, but this conclusion is wrong.
The key here is that people living on the first floor don’t need to climb stairs. If you want to go to the third floor, you have to climb two flights of stairs, not three. If you want to go to the sixth floor, you have to climb five flights of stairs, not six.
The answer is two out of five. 4. Cat, chicken, and rice are crossing the river. A man is crossing the river with a cat, chicken, and rice. In addition to the need for a person to row the boat, the boat can carry at least one of the three: cat, chicken, and rice. When the person is not present, the cat has to eat Chicken, chicken needs rice.
Try to design a plan for crossing the river safely and minimizing the number of ferries. Answer: 1) Bring a chicken and come back empty-handed 2) Bring a cat and come back empty-handed 3) Bring rice and come back empty-handed 4) Bring a chicken 5. Weigh apples. There are ten bags of apples, ten in each bag, and any apple in them The apples in nine bags are of equal weight; it is known that the apples in nine bags weigh 50 grams, and only one bag weighs 45 grams.
There is only one rod to weigh, and it is required to be weighed only once. Find the 45-gram bag of apples and ask how to weigh the answer: First, number the ten bags of apples as 1 and 2. .
10, and take out the apples with the same number in each bag and weigh them once. If it is a multiple of 50, it is bag No. 10. Otherwise, if it is different by 5 grams, it is bag No. 9. The difference is two. The first is bag No. 8. 6. The sum of numbers is a two-digit number. The sum of the number in the tens place and the number in the ones place is 10. If the positions of these two numbers are exchanged, the resulting number will be 36 smaller than the original number. The original two numbers How many digits are there? Tips: For a two-digit number, swap the digits in the ones and tens digits to get a new two-digit number. The difference between the original number and the new number must be a multiple of 9. Divide this difference by 9 to get the ones and tens. Digital difference in bits (big reduction).
Here is 36÷9=4, which means that the difference between the original number's ones digit and tens' digit is 4 (large reduction), and their sum is 10, so the problem becomes a sum and difference problem. The original number is 73.
7. Rectangle A and B are two rectangles. Their perimeters are equal. The ratio of A’s length to width is 3:2, and the ratio of B’s length to width is 3:5. Then the area of ??A and B is How many answers: The length of A is 24 and the width is 16. The length of B is 15 and the width is 25. The area of ??A is 384 and the area of ??B is 375.
There is no single answer.
7. Fill-in-the-blank questions on daily life knowledge
1. Taking drugs is very harmful to the human body. When intoxicated by taking drugs, it will cause confusion and respiratory paralysis. In severe cases, people will enter the body. Coma, death due to difficulty breathing.
2. Not spitting on the ground can avoid spreading diseases, and it is also an important symbol to measure the level of social civilization. 3. After long-term physical exercise and physical labor, the contraction force of respiratory muscles can be strengthened, the range of activities of the thorax can be expanded, and the number of alveoli involved in gas exchange can be increased.
4. Oxygen is indispensable for human life activities. Normal breathing ensures the human body’s need for oxygen. However, in some cases (such as drowning, gas poisoning), breathing stops, which is very dangerous.
To implement artificial respiration for patients with respiratory arrest, the mouth-to-mouth insufflation method is a simple and easy method, but the following issues should be noted: The surgeon holds the patient sideways and holds him up with one hand. Hold the back of the patient's neck, pinch the patient's nostril tightly with the other hand, and blow into the patient's mouth. The amount of air blown is half of the deep breath, etc.
8. Fill-in-the-blank questions on daily life knowledge
1. Taking drugs is very harmful to the human body. When poisoned by taking drugs, it will cause confusion and respiratory paralysis. In severe cases, people will enter into the lungs. Coma, death due to difficulty breathing.
2. Not spitting on the ground can avoid spreading diseases, and it is also an important symbol to measure the level of social civilization.
3. After long-term physical exercise and physical labor, the contraction force of respiratory muscles can be strengthened, the range of activities of the thorax can be expanded, and the number of alveoli involved in gas exchange can be increased.
4. Oxygen is indispensable for human life activities. Normal breathing ensures the human body’s need for oxygen. However, in some cases (such as drowning, gas poisoning), breathing stops, which is very dangerous. To implement artificial respiration for patients with respiratory arrest, mouth-to-mouth insufflation is a simple and easy method, but the following issues should be noted: the operator holds the patient sideways, holds the back of the patient's neck with one hand, and holds the patient's neck with the other hand. Pinch the patient's nostrils tightly with one hand and blow into the patient's mouth. The blowing volume is half of the amount of deep breathing, etc.