The groundwater in our hometown is seriously polluted, and there is white dirt after boiling, so ask

There is no correlation between the presence of white dirt and the presence of pollution.

The first thing to do is to determine what these white dirts are.

If the main components of these white dirts are calcium salts and magnesium salts, then these white dirts have nothing to do with pollution! It's a natural phenomenon! This water is hard water. Groundwater, especially those flowing through limestone areas, is typical of hard water.

If these white dirt are some heavy metal salts, then this is caused by pollution. If you don't have an industry in your area, you can't rule out the possibility that there are a lot of deposits of this heavy metal underground.

If it is hard water, the solution is very simple - the groundwater is pumped to a pool on the ground and stored for a period of time, the water temperature increases, and the calcium bicarbonate and magnesium bicarbonate in the hard water will be decomposed into calcium carbonate and magnesium carbonate after heating.

If it's polluted, there's only one way – stop using the water, there's no other way! If it is caused by factory discharge, it will be resolved through law. If it's caused by underground deposits, mine! Use mining to get money and find water from afar.

I learned chemistry in my first year of high school (if I'm not mistaken). That's what it mentions to solve.

If the alkali is large, you can put some vinegar to neutralize it.

Besides, where are you from, don't you have a waterworks in your town, if not, contact me, I'll invest in a waterworks.

Just install a household water purifier.

If you have the money to install an ultrafiltration water softener, it's also good.

"There is dirt after boiling the water in the groundwater", the professional saying should be called limescale??? This should be due to the alkaline nature of the water. The main components are in the form of calcium carbonate or magnesium bicarbonate salts.

Due to the reaction of minerals in the water, it becomes calcium bicarbonate suspension or sediment, indicating that the water hardness of groundwater is large, that is, the concentration of calcium and magnesium ions is large!

When limescale fragments enter the stomach and react with hydrochloric acid, they release calcium and magnesium ions, which are necessary for stone formation, but there is no direct relationship between scale and carbon dioxide. The latter can cause flatulence and discomfort, and patients with gastric ulcers may also be at risk of gastric perforation.

Strictly speaking, scale is harmful to the human body, but it is definitely acceptable to the human body and will not cause any specific harm. However, the scale that has been formed for a long time contains a lot of sediment, and is accompanied by trace metal elements produced in the boiling water container, including heavy metals such as lead, zinc, arsenic, etc., which is harmful to the human body, but it will not be as alarmist as some water purifier advertisements say! It is harmful to use the kettle for a long time without cleaning it for a long time, and it is not a big problem to clean the kettle frequently, just use vinegar!

Hard water with a high degree of mineralization, unfiltered and long-term drinking can lead to stones.

First of all, we must have a good awareness of reducing white pollution [must] [premise] 1When going out to shop, try to use less plastic belts and cloth bags [very environmentally friendly] 2Our used plastic tapes should be reused as much as possible [Simple] 3Policy The state should increase its efforts to implement the plastic restriction order.

4.Garbage sorting.

5.Use less single-use products.

It's actually very simple: as long as we want to do a good job of our environment, everything is fine, white pollution is a figurative term for the phenomenon of waste plastic polluting the environment. It refers to the packaging bags, agricultural mulch films, disposable tableware, plastic bottles and other plastic products made of polystyrene, polypropylene, polyvinyl chloride and other polymer compounds that are discarded as solid waste after use, and are difficult to degrade and dispose of due to random littering, causing pollution to the ecological environment and landscape.

Plastic is not easy to degrade, affecting the beauty of the environment, and the ingredients contained are potentially harmful.

1. Use less disposable products.

2. **Shuo material products.

3. Do not litter the products.

1.Reforestation.

2.Use less disposables.

3.Use less plastic bags.

1.Protect the tree forest 2Use less single-use plastic bags3Use less single-use products.

Only by reducing the use of plastic materials can we reduce the number of teachers and students.

White pollution is a kind of image name for the phenomenon of environmental pollution by refractory plastic waste (mostly referring to plastic bags). It refers to the use of polystyrene, polypropylene, polyvinyl chloride and other polymer compounds made of all kinds of plastic products are discarded into solid waste after use, due to random littering, difficult to degrade and process, resulting in serious pollution of the urban environment, long-term accumulation will destroy the soil, pollute groundwater, endanger the survival of marine organisms and so on.

Ways to reduce white pollution:

1) Reduce the use of unnecessary plastic products, such as replacing plastic bags with cloth bags;

2) Reuse some plastic products, such as plastic bags, plastic boxes, etc.;

3) Use some new types of degradable plastics, such as biodegradable plastics and photodegradable plastics;

The account you added is not an individual billing account, it may be a fixed-term account or a dormant account that has not been used for a long time, and the account status is abnormal.

According to the bank's regulations, the internal error: ES0998 is a system upgrade or maintenance that will affect the normal operation of the business.

It cannot be operated during the maintenance period.

It is recommended to avoid this time period.

This is the only way.

Why? 1. There is a denominator, which must be passed.

2. Go to the brackets, don't go and can't do it.

3. Merge similar terms, and move the items containing x to the left of the equal sign and the constant terms to the right.

The coefficient of 4,x is divided to 1.

It's already easy to understand.

In class, it is necessary to improve the efficiency of listening and taking detailed notes. Homework should be taken seriously, and if you can't, you must find a teacher. The most important thing is to believe that you can learn well and be willing to work hard, and then you will feel that math is not difficult at all.

In mathematics, first of all, you need to memorize the formulas, as long as you memorize the formulas and laws, mathematics will not be a problem.

Don't be in a hurry, sometimes it's useless to be in a hurry. As long as you study carefully, don't worry if you can't learn, sometimes it takes a long time for knowledge to enter your head and sort it out. Especially mathematics.

When I was a freshman in high school, I didn't know how to do the questions I talked about on Monday, and I didn't have to review them on Thursday. Sometimes it's annoying to do the question. Don't worry, first see if you have any gaps in your basic skills, if you don't know the basic skills, you will have to do more exercises.

If you don't understand the new knowledge, put it down first, wait for the holiday to think about it, and if you can't figure it out, wait for the third year of high school to think about it, as long as the knowledge is in your head, you will figure it out one day. Now are you studying algebra or geometry?

Do more questions and look at more problem-solving skills.

Do more questions, what else can you do, and mathematics is not something that can be made up if you want to.

Do more questions, increase the amount of questions, don't get distracted in class,,, work hard.

Mathematics. There is no way. It's just a matter of doing more questions.

You just learned to learn for the sake of fractions! Once you've learned it, you need to know the principle!

In the third year of high school, you understand everything... No hurry, no hurry = = I didn't pass math in my first and second years of high school, and I had more than 120 in my third year of high school.

Every time you summarize what you got wrong, the formula is basic, and the main thing is to be flexible.

I also took a 123 month in high school, and the average score in mathematics in my class was 110, which is still an IQ problem.

Make a mistake book, find the good ones in your class to come and take notes, copy it again to ensure a high score!

If you do too many questions, you will naturally understand some tricks, practice makes perfect!

Do more questions and summarize more. That's how math is learned.

In many instrumentation and sensor applications (such as thermocouples, RTDs, resistive bridges, etc.), there are challenges such as small signals (UV or MV level), large common-mode interference, and high output impedance of sensitive components. Therefore, it is required that the subsequent amplification circuit should have a high common-mode rejection ratio and a high input impedance. Typical differential amplifiers have a high common-mode rejection ratio but no high input impedance; Although the ordinary forward proportional amplification circuit has a high input impedance, it does not have any ability to suppress common-mode interference. Instrumentation amplifiers, on the other hand, combine these two characteristics.

First, let's talk about how instrumentation amplifiers can achieve high common-mode rejection ratios. The differential amplifier circuit is the main reason for the high common-mode rejection ratio, and the second stage of the instrumentation amplifier (i.e., the amplifier that follows) is a typical differential amplifier (i.e., the subtractive circuit).

Then we will solve the problem of input impedance. An amplifier is connected to each of the two inputs of the differential amplification circuit and is used as a buffer to increase the input impedance to a very high level. The negative feedback circuitry of the two input amplifiers is then connected to a gain resistor to achieve another magic effect.

It is to amplify the differential signal and keep the common-mode signal unchanged.