Who has the reading answer to the dilemma of desalination

1 Read through the full article and talk about the dilemma of desalination?

To answer this question, you need to read through the whole text, summarize the meaning of each natural paragraph, and on this basis, sort out the ideas of the article, and summarize the relevant words and sentences in the text after making slight adjustments.

2 In the first paragraph, what are the methods used to illustrate the line sentence? What does it do?

When answering this question, the method of explaining the "column of numbers" is very clear, and it is easy to miss another method of explanation. This method of explanation can be seen from the "Gulf area only". With regard to the effects, it is easy to see that two methods of description are used to specify the large discharge of desalinated wastewater, while ignoring its deep effects.

Therefore, it is important to consider tightly centering on the explanatory center.

3 Explain the meaning of the words in the sentence in the paragraph.

An analogy is used here. First of all, it is necessary to clarify the meaning of the word "crane top red", and then understand its meaning in the text in combination with the context.

4 In paragraph 1, could the word "one of the methods" in the phrase "desalination remains one of the methods we need to consider" be deleted? Why?

When answering the question, you can first compare the original sentence with the changed sentence to experience the difference. When expressing, first indicate whether it can be deleted, and then state the reason, that is, what the original sentence means, what it means after the change, and what is the difference between the two.

1.Due to the depletion of freshwater resources and the reduction of costs, the desalination industry is booming.

2.Desalination is a complex and difficult technique for extracting fresh water from seawater.

3.Desalination produces a by-product called "desalinated wastewater", which can have a devastating effect on underwater life.

Two substances discharged from desalinated wastewater, chlorine and copper, are harmful to living organisms.

In reality, desalinated wastewater is not a simple toxicity superposition, and through a complex mechanism, salinity, alkalinity, high temperature and chemical properties are likely to reinforce each other.

The seaside ecological environment also has a great impact on the discharge of desalination wastewater.

4.Heding red is used to describe the destructive effect of low concentrations of dissolved chlorine on marine life, that is, poison.

1. The article focuses on "there is also fresh water on the seabed", explaining that there is fresh water on the seabed and the amount is amazing, the two types of seabed freshwater, the theory of seabed freshwater, and the development prospects of seabed freshwater. (The information is complete and the meaning is correct).

2. The terrestrial water-bearing structure extends to the seabed water-bearing structure not far from the shore. The groundwater outlet is below the sea surface, and the head pressure is very high Groundwater gushes upward, forming a submarine fountain.

3. Example of osmosis theory; Precipitation (rain and snow) seeps into the ground to form an aquifer and flows into the seabed.

Magma Theory: Underground degassing zones release oxygen and oxygen and bind to each other.

Sedimentation theory: Water in sediments is squeezed out by gravity and brought deep into the formation (complete information. Just get it right. )

4. Example: In the process of building and drilling, the pollution to the marine environment should be reduced as much as possible; It should be moderately exploited, and excessive exploitation should not be allowed; Care should be taken to avoid damage to the marine ecological environment near the freshwater area.

1.They refer to water, the source of life, because the source of the sea is water.

2.Gather, imitate friends gather. There is a saying that is inclusive. Have a broad mind for the preparation of Huai.

1 "My Dream" refers to the cultivation of talents, "Blue Hope" refers to the knowledge of students who become the pillars of the construction of the hail motherland and the hope of the motherland tomorrow, and the meaning of "sowing" is to cultivate education.

2 Gather trickle, accept all rivers, constantly enrich yourself, never satisfied, never stop!

3 There are two kinds of seas written in the text, one is the real sea and the other is the sea of knowledge. Their common characteristics are: broad, boundless, majestic, unbridled and vigorous; Their existence needs to be constantly enriched and gathered.

The text writes about the two seas of hunger. One is the sea in real life, and the other is the ocean of knowledge, and the common characteristics of their silver heads are that they are vast, boundless, majestic, and atmospheric, so that people like it and swim in them.

1. Characteristics: large reserves, rich nutrients, low bacterial content, circular movement opportunities: the development of marine fisheries (or:

Increase fish production) (2) Development of "green medicines" (or: ** disease) (3) Production of delicious food (4) Development of a new generation of cosmetics (answer three points correctly).

2 Abundant Nutrient-dense foods (or: food).

3. The column of numbers shows that deep seawater is a wonderful "green medicine" (or: it shows that the use of deep seawater ** congenital allergic dermatitis is effective).

11 The word in the first paragraph that is close to the meaning of the punctuated word "fertile" is that the punctuated word "fertilizer" means in the text. (4 points).

12 The line-drawing sentence in the first paragraph uses the explanatory method of , and its function is . (3 points).

13 One of the following misunderstandings is incorrect (3 points) in the context

a Marine treasures include abundant biological, mineral and deep marine resources.

b The artificial creation of "rising seas" is to make full use of deep seawater resources.

c Photosynthesis is not possible in deep seawater, and trace elements are preserved.

d Fish production per unit area of rising seas is tens of thousands of times higher than that of offshore waters.

14 In the full text, deep seawater has the characteristics of , and , and it brings new opportunities to mankind in the 21st century (1) (2) (3). 12 points).

12.(3 points) column number (1 point) indicates that deep seawater is a wonderful "green medicine" (or: indicates that the use of deep seawater** congenital allergic dermatitis is effective) (2 points).

13.(3 points) c

14.(12 points) Rich in nutrients Can form a "rising sea surface" Clean and less bacteria Circular movement (1 point for one correct answer, 3 points for correct answers) Development of marine fisheries (or: increase fish production) Development of "green medicine" Production of delicious food Development of a new generation of cosmetics (3 points for a correct answer, 3 points for a correct answer) The use of deep seawater Read the answers.

Rich in nutrients Can form a "rising sea surface" Clean and less bacteria Circular movement (1 point for a correct answer, 3 points for a correct answer) Development of marine fisheries (or: increase fish production) Development of "green medicines" Production of delicious food Development of a new generation of cosmetics (3 points for a correct answer, 3 points for a correct answer).

Basic Training Answers:

1. Vast hàn cyanobacteria zǎo spiny skin jí exposure pù

石莼 chún sodium chloride lǜ浒苔 hǔreef membrane jiāo

2. 1 Comparative description of perceptual reason.

2 See analysis 3, number 3

3 d4 is arranged in the logical order of the laws of people's understanding of the problem. According to the characteristics of the vast ocean introduced above, the important role of the ocean is explained from the two aspects of "cradle" and "pasture", revealing the truth that the ocean nurtures and supports life, expounds the close relationship between the ocean and life in the past and present, and makes people clearly see the role played by the ocean in the birth and development of life.

III. 1 Scientific terms: "heterotrophs", "autotrophs", "photosynthesis", "media".

2 (1) "Water is an important medium of metabolism, without which a series of physiological and biochemical reactions in the body cannot be carried out and life stops. ”

2) "Although sunlight is necessary for life, the ultraviolet rays in sunlight are in danger of killing primitive life." ”

3 (1) "The vast ocean, once the cradle of life, is now a natural 'pasture''。”

2) "Don't underestimate these single-celled seaweeds, they are the 'masters' of the ocean."'。”

3) "These are the nameless hermits."', which supports tens of billions of tons of marine animals, they are the real ocean's pasture'。”

4 (1) "Average" refers to things as a whole, not to individual individuals. If this word is removed from this sentence, the meaning is completely wrong. The deepest trenches in the ocean are 10,000 meters, and shallow seas, such as the Tropical Coral Sea, are only nearly 100 meters.

2) "Approximately" means to estimate and speculate, imprecise. If this word is removed from this sentence, it becomes very certain, which is not in line with objective reality, and human exploration of ancient times can only be scientifically speculated and estimated on the basis of some ancient relics or residual phenomena.

3) "Probably" is also an estimate and speculation, for the same reasons as above.