Water can save people and kill people.
Fish can't have too much water, and people are afraid of water shortage.
Rome was not built in a day.
Water is there and nothing is done, but without water, the world is dry.
Question 2: What can water do? What can water do? 1. You are 60% of the water on the earth. Where there is water, there is life. All life activities originate from water. Water in human body accounts for about 65% of body weight. Among them, the brain water content is 75%, the blood water content is 83%, the muscle water content is 76%, and even the hard bones contain 22%! Without water, nutrients in food can't be absorbed, waste can't be excreted, and drugs can't reach the effective parts. Once the human body is short of water, the consequences are very serious. Lack of water 1%-2%, feeling thirsty; Lack of water 5%, dry mouth, wrinkled skin, unconsciousness, and even hallucinations; Water shortage 15% is often more than hunger. Without food, people can live for a long time (some people estimate that it is two months). If there is no water, they can live for a week at most. 2. The lifeblood of crops Grab a handful of plants with your hands, and you will feel wet and cold, because of the water. Plants contain a lot of water, accounting for about 80% of their weight, vegetables contain 90%-95% of water, and aquatic plants contain more than 98% of water. Water transports nutrients for plants; Water keeps the branches and leaves of plants elegant; Water participates in photosynthesis to produce organic matter; The evaporation of water keeps plants at a stable temperature to avoid being burned by the sun. Plants are not only covered by water, but also crops consume water all their lives. 1 kg corn is irrigated with 368 kg water; Similarly, wheat is 5 13 kg water, cotton is 648 kg water, and rice is as high as 1000 kg water. One seed falls to the ground, ten thousand grains are put into storage, and agriculture gains a lot. Water has made a lot of contributions! 3. Industrial blood water participates in a series of important links in the production of industrial and mining enterprises, and plays an important role in manufacturing, processing, cooling, purification, air conditioning and washing, and is known as industrial blood. For example, in steel mills, production is guaranteed by cooling water; When steel ingots are rolled into steel, they should be cooled with water; Part of the dust of blast furnace converter depends on water to collect; Water is indispensable in a boiler. It takes about 25 tons of water to produce 1 ton steel. In the paper mill, water is the medicine of dissolving agent, explaining agent, washing and transporting medium and solvent. It takes 450 tons of water to make 1 ton paper. The cooling water consumption of thermal power plants is huge, and at the same time, it also consumes some water. The flour mixing, distillation, cooking, pickling and fermentation in food factories are all inseparable from water. Soy sauce, vinegar, soda and beer are simply the embodiment of water. 4. Water flows around the world. Humans discovered that water has buoyancy long ago, so ships came into being, from rafts inflated with sheepskin, canoes paddled by hands, beautiful masts sailing in the wind, to luxury cruise ships carrying thousands of people and nuclear-powered aircraft carriers. Water divides the land mercilessly, but ships connect the world closely. During the Ming Dynasty, Zheng He led a huge fleet to sail seven times and reached Somalia in Africa as far as possible. Waterway transportation is cheaper than highway and railway transportation, and the transportation volume is large and stable, and it is still a transportation line that will not be blown up. Besides, some places can't repair roads at all, so they can only rely on water transportation. Therefore, in the transportation industry, the passenger volume and freight volume of water transport account for a large proportion. The development of water transport not only prospered the economy, but also made Shanghai, Tianjin, Hongkong, new york and Rotterdam become world-class cities. Without water, it is difficult to make beautiful scenery. Most scenic spots are decorated with water as the protagonist. You see, the spring tide of Qiantang River, Mount Everest, the fog of Lushan Mountain, the sea of clouds in Huangshan Mountain and the ice lanterns in Harbin are all changes in water. From the geological point of view, Guilin landscape, Yunnan Shilin, loess high slope, exquisite rain flower stone, everywhere has the outstanding performance of water. Venice, Suzhou, Jinan and Yueyang are also famous for their water. West Lake in Hangzhou, Slender West Lake in Yangzhou, Kunming Lake in Beijing, Three Towns in Wuhan, Huangpu River in Shanghai and Pearl River in Guangzhou all contributed to environmental beauty. Taihu Lake is beautiful, and the beauty lies in the water. Nowadays, reservoirs and channels have become important places for people to rest; Artificial fountains and water clocks that tell the time have become the most attractive attractions; Swimming, diving, surfing and boating are people's favorite water activities. 6. Water and environmental protection Water is an extremely important and active factor in the natural and social environment. Beautiful scenery, birds and flowers, good weather and good harvest are the beautiful scenery that human beings pursue and yearn for, and also the fruits of human labor creation and careful care. Water is constantly flowing, which makes the world full of vigor and vitality in human body, farmland and factory. Dirt is carried away by the current, diluted, dissolved and purified by nature. However, more water, less water and dirty water will also cause great disharmony. Rivers flood and land sails; Bare land thousands of miles away, seedlings wither; Water is rancid and destructive ... >>
Question 3: What can a ton of water do? 1 ton of water equals 1000 liter of water.
A liter of water can be: 1. Pour five glasses of water. You can wash the car. You can water 6 pots of flowers. Enough for one person in the earthquake-stricken area to drink for two days. 5. You can wash your hair 1 time. 6. Clothes that can be washed 1. 7. Drag the floor of 30 square meters. ............................................................................................................................................................... multiplies the above activities by 1000 times. Ok ~ in short:
It can be used by a family of three for two months (ultra-water-saving and low-carbon families) or three days (at present, bathing, cooking, washing, washing hands, flushing toilets and so on are included in urban families).
For Chinese mainland, using 1 ton of water in a wasteful way can generate 100 kWh (potential hydropower) and 2500 kWh (steam thermal power, but excluding heat loss), and can smelt 40 kilograms of steel (steelmaking water), produce 500 kilograms of chemical fertilizer (petrochemical water) and weave 200 meters of cloth (textile water). Production of 3000 pencils, 200 kilograms of cement, 250 kilograms of cooking oil, 2000 kilograms of oil refining, 1 1 TV set, 100 kilograms of paper making, 2000 pieces of red bricks, and 80 sets of school uniforms (all used to make water) are too numerous to mention. I'll give you a formula, and you can calculate it yourself.
If the total drop height is h meters and the flow rate is q cubic meters per second, if the power is expressed in (kW), the output power of water is p = 9.8 η qh (kW), where η is the total efficiency. An example shows that there is a power station with total drop 100 m and flow 10 cubic meter per second, and its theoretical output power is: p = .8× 0.9×10×/kloc-0 = 8820 (kW).
Question 4: What can water do? In hot summer, sweat will take away a lot of salt. In this weather, what kind of water can you drink to supplement nutrition and keep healthy?
Add some salt to mung bean soup.
Professor Nan Qingxian from the College of Food Science of China Agricultural University said that because people sweat a lot in summer, they can often drink salt water, such as brackish water, salty tea and salty mung bean soup.
He said that the World Health Organization had given advice on eating salt scientifically, that is, each person should not exceed 6 grams per day, but it can be increased appropriately in summer.
Professor Nan believes that drinking these salty drinks is because they contain a lot of minerals such as sodium and potassium, which can supplement the mineral loss caused by a lot of sweating. He said that if you simply replenish water after sweating, you will drink more and more thirsty, and you will not be able to achieve the purpose of replenishing water. It may also lead to "water poisoning" symptoms such as rising body temperature, calf muscle spasm and coma. In addition, it is best to add some sugar when drinking salt water to supplement the energy consumption of the body.
You don't sweat much, just drink plain water.
Professor Nan told everyone that if you don't sweat much in summer, you can usually drink boiled water and tea. Boiled water is rich in a variety of minerals and trace elements, which can adjust the balance in the human body, which is beyond the reach of ordinary drinks.
The method of drinking water is also particular. He pointed out that although drinking heavily is a temporary enjoyment, it increases the amount of urination and sweating, leading to more electrolyte loss, and also increases the burden on cardiovascular and kidney, which is easy to cause symptoms such as palpitation, fatigue and frequent urination. Drinking water too fast and too hard is easy to swallow with the air, causing hiccups and bloating. The reasonable drinking method should be a small amount, multiple times and slow drinking. Especially after outdoor activities in summer, it is not advisable to drink water immediately. You should have a rest and don't drink too much at a time.
Lactic acid bacteria drinks are also suitable for drinking in summer.
What water to drink at home can be self-regulated, but what should I do when I go out? Professor Nan said that there are all kinds of drinks on the market now, among which lactic acid bacteria drinks and tea drinks are more suitable for drinking in summer. The milk content of lactic acid bacteria beverage is relatively low, and the overall nutritional value is not as good as yogurt, but it is more thirst-quenching to drink. Among them, active lactic acid bacteria are very beneficial to human body, which can promote the absorption of nutrients and regulate gastrointestinal function. Some lactic acid bacteria drinks also add calcium and vitamins needed by the human body, which can play a certain role in supplementing nutrition.
Fresh and refreshing tea drinks have diuretic, heatstroke prevention and cooling effects, as well as antioxidant and anti-fatigue effects, and are also suitable for drinking in summer. At the same time, tea beverage, like tea, contains vitamin A and vitamin E, which helps to protect the skin and reduce the influence of ultraviolet rays.
As for carbonated drinks that young people like very much, Professor Nan pointed out that although it quenches thirst, it contains almost no nutrients except calories, and the sugar content is relatively high. Excessive drinking can easily lead to obesity and diabetes, especially for children.
Question 5: What good things can water help people do? Water can help people do many good things:
Water can save people trapped in the desert and give them hope to survive again.
Without water, crops can't survive. Because of water, crops can grow well.
Water can help people generate electricity.
Water can irrigate crops and make them grow more vigorously.
Water can be used for cooking and washing vegetables.
Water can wash away dirt and wash clothes.
Water is the main component of human body fluids, and all life activities originate from water. After the human body is short of water, there will be dry mouth, skin shrinkage and unconsciousness. Water plays an important role in human metabolism.
Because there is water, a boat is built, and the boat can walk in the water. Ships connect the world closely. Waterway transportation is cheaper than road and railway transportation, and the transportation volume is large and stable. Some places where roads cannot be built can only rely on water transportation.
Water is also important in industrial and mining enterprises. It plays an important role in manufacturing, processing, cooling, purification, air conditioning and washing.
The flour mixing, distillation, boiling, pickling and fermentation in food factories are all inseparable from water, and soy sauce, vinegar, soda and beer are also inseparable from water.
Water contributes to the beauty of the environment, and many entertainment places and places with beautiful environment cannot do without water.
Water is a substance that cannot be replaced by other things.
Question 6: What are the benefits of water? What can you do for people? Water is the source of life, which is indeed the most pertinent evaluation. Since the first day of life in water, the role of water in life has not changed. Water is the most abundant substance on the earth and in our bodies. An 8 kg baby has nearly 6 kg of water, and an adult is 75% water. Water exists only in human body. Because all metabolic reactions occur in water medium, water is also an essential substance in life. For the human body, participate in life sports, eliminate harmful toxins in the body, help metabolism, maintain aerobic breathing and so on. Its function and function are unique.
We may know a lot about all kinds of water in nature (rain, sea water, river water, etc.) ), but we know little or nothing about the water in the body. If we understand the role and function of water in human body, we will suddenly realize that many inherent concepts will be completely changed.
The various physical and chemical properties of water make it undertake various key body functions. The role of water in maintaining life includes:
Help digestion: the food we eat in our mouth, after being chewed by our teeth and moistened by saliva, goes through the process of complete digestion and absorption from esophagus to stomach, and all these links need the participation of water. The nutrients we need can only be absorbed if they are completely dissolved in water.
1. transport nutrition: water transports fully dissolved nutrients to cells, and water also transports various bioactive substances, such as hormones, enzymes, platelets and blood cells. Water makes the chemical function of cells go smoothly after metabolism.
2. Waste discharge: Water is a very good solvent and suspension medium. Many substances are dissolved and suspended in water, and can form new substances through various reactions. This property of water can make the wastes and toxins produced in the process of metabolism in the body excrete in various ways, and all these ways require the participation of water.
3. Joint lubrication: Water is the main source of human joint lubrication fluid. As a solvent, water, together with various viscous components, forms a lubricating liquid for lubricating joints, a viscous liquid for lubricating the digestive tract and urinary system, a slurry for lubricating internal organs, and digestive tract secretions such as saliva that play a lubricating role in food digestion.
4. Balance body temperature: After water absorbs heat, the temperature change is relatively small. Because of this thermal solubility, water absorbs heat, produces and evaporates sweat to release heat to help the body regulate body temperature and keep it normal.
5. Maintain cells: Water is an important part of human body structure. It promotes the metabolism of cells and participates in maintaining the normal morphology of cells and the composition of intact cell membranes. It also maintains the whole organ through its buffering effect. The maintenance of body structure also needs its help. Keeping the skin smooth and elastic, the hydration state of cells and the regulation of the body play a key role in maintaining the normal function of cells.
Question 7: What good things can water do for people? You can wash vegetables to quench your thirst and take a bath to make tea.