Desalination has been a concern for many years

Tell you for sure, the cost of choosing is too high, b

I've done this a few times, on different versions.

It's your answer that was misprinted.

Hehe, but the real questions are generally rarely repeated.

Praise for the spirit of study and research :)

ps: When I saw the experts downstairs, I laughed off

PS: Professional, as follows.

This kind of topic should be faithful to the original text, and cannot be inferred from common sense in life.

Why not choose B, if only the "seawater desalination technology is not yet mature" half a sentence is no problem, but the cost is too high in any case from the stem of the topic.

The slow progress of desalination means that there is no "desalination technology" that has been developed, in other words, there is no technology to achieve desalination.

Although it is true that there are some desalination technologies in combination with the reality of life, this is just common sense in life, and you can't choose A because of this

Now that we want to direct water to the water-scarce areas in the west, the problem of desalination may be solved naturally, so this should not be a multiple-choice question, but an essay question.

I also took the civil service exam, and I also think it is better to choose B. You can't grasp the questions of civil servants, otherwise you will get more and more dizzy.

Seawater desalination can increase the total amount of Danxiang round fiber water, and the most widely used method of seawater desalination is currently ?

a.Distillation.

b.Reverse osmosis method (correct answer, imitation case).

c.Seawater freezing method.

d.Electrodialysis.

Answer analysis: At present, the most widely used method of seawater desalination is reverse osmosis.

1. Fresh water is taken from seawater, including evaporation method, reverse osmosis method, hydrate method, solvent extraction method and freezing method. Object beams.

2. To remove the salt in seawater, there are electroosmosis demolition method, separation and pressure infiltration method.

At present, the first type of method is mainly applied. As early as the 15th century, some ships used simple steaming codistillation devices to solve the problem of fresh water ** in long-term voyages.

Since the 50s of the 20th century, with the development of industry and agriculture and the increase of urban population, fresh water has gradually become scarce, resulting in serious water shortage in some coastal cities. Therefore, improving the technology of seawater desalination has become one of the important ways to develop new water sources.

At present, there are many methods of desalination of seawater, such as: distillation method, crystallization method, desalination membrane method, multi-stage flash distillation method, etc., among which the most commonly used is distillation method, and multi-stage flash distillation method is mostly used at present

Therefore, the answer is: distillation method, multi-stage flash distillation method

Application advantages of seawater desalination system.

Seawater desalination is an important means to solve the shortage of human beings, and it is also the only means to solve the shortage of human water resources in the future.

Throttling is about saving water, but it only reduces water consumption, not creates new resources. Desalination is the most affordable and feasible open-source method at this stage.

Now China has begun the large-scale application of seawater desalination, the daily production of desalination water is close to 600,000 tons, the cost is about 6 8 yuan tons, and is still decreasing, I believe that in the near future, seawater desalination will become one of the important water sources for ordinary people.

What do you know after reading this information about desalination?

Dear, after reading this information about desalination, we know that desalination is a process of removing salt from seawater and turning it into fresh water suitable for human use. At present, seawater desalination technology is mainly divided into two types: thermal method and membrane method, of which thermal method includes multi-effect distillation method and flash method, while membrane method includes reverse osmosis method and electrodialysis method. In addition, seawater desalination is of great significance to solve the problem of global water shortage, but it also has problems such as high energy consumption and environmental pollution, which requires further technological innovation and environmental protection measures.