B What is the scientific nature of expository writing

Expository essay features.

The primary characteristic of the expository genre is intellectual, that is, it focuses on explaining and disseminating a certain kind of knowledge that has been recognized, rather than focusing on establishing an argument through argumentation or argument (condensed knowledge) like the narrative style, nor is it focusing on expression like a narrative.

The second characteristic of the explanatory style is scientificity, that is, when introducing, explaining, and disseminating knowledge, it must be scientific, can accurately reflect the reality of objective things and their regularity, and does not allow any subjective arbitrariness. Through accurate definitions, appropriate arguments, reasonable distinctions, and clear explanations, readers are given scientific knowledge.

The third characteristic of expository style is illustrative, that is, it takes explanation as the main mode of expression. The language of illustration is concerned with universality rather than the individuality of narrative; It is concerned with concreteness rather than the abstract nature of argumentation; Rather than the perceptibility of the narrative and the logic of the argument, it pays attention to the clarity. Explanation is a form of language that introduces and explains certain objective things in a specific and unmistakable sense in a general sense.

Illustrative also reflects the purpose of the expository style, that is, through truthful explanation, let people understand physics, give people knowledge, and teach people to use, rather than like the discussion ** through logical argumentation, know people to reason, guide people to act, and not like narrative through image portrayal, moving people with feelings, showing people with examples.

The life of an expository essay lies in its scientific nature. When reading expository texts, we should focus on whether the articles faithfully reflect objective things, whether the characteristics, essence, and regularity of things are accurately and clearly explained, and give readers a correct explanation.

The accuracy, plainness, thoroughness and scientific nature of expository language are the prerequisites for expository language. The representation of time, space, quantity, scope, degree, characteristics, nature, procedure, etc., all require accuracy. The practicality of the explanation is very strong, and the slightest mistake will be missed.

Under the premise of accuracy, some of the language of the explanation is known for being plain, and some is known for being lively and lively. Due to the different objects of description and the language style of the author, the language of description is also diverse: either generalized or specific; or concise, or plump; or concise, or exhaustive; Or plain and simple, or humorous, in short, eclectic.

Reading expository texts and writing expository essays can be linked. The four points mentioned above should be grasped, pay attention to reading expository essays, and pay attention to writing expository essays, but the requirements put forward should be in line with the actual situation of students.

Linguistic features of expository texts:

First, the content is scientific.

The content of the expository essay must be true and accurate, based on conclusive materials, truthfully reflect the characteristics, essence and laws of objective things, and be rigorously scientific.

Second, the structure is organized.

Things and events are sometimes complex, and in order to give the reader a clear understanding, there must be a certain order and order in explaining their characteristics. Common instructional orders are chronological order (procedural order is also a type of chronological order), spatial order, and logical order. This order of explanation is often reflected in the structure of the article, so when reading the expository text, it is consistent to clarify the structure level and grasp the order of explanation.

Third, the accuracy of the language.

The practicability of expository essays is very strong, and if the language expression is "missed", the result will be "a thousand miles wrong", so the expository language needs to be accurate and give readers a scientific understanding. Today, with the rapid development of science and technology, the application of expository essays is becoming more and more extensive, and textbooks, popular science reading, knowledge sketches, explanatory words, and instructions of various disciplines are expository essays. It can be said that expository essays are very closely related to our daily study, life and work.

Expository essay is a genre of essay in which explanation is the main mode of expression. The explanation of objective things or the interpretation of abstract things makes people have a scientific understanding of the form, structure, nature, type, cause, function, relationship or concept, characteristics, evolution, and differences of things, and the center of the expository essay is clear and prominent, and the article is scientific, organized, and the language is accurate and vivid. It illustrates the characteristics, essence, and regularity of things by revealing concepts.

Expository essays generally introduce the shape, structure, category, relationship, and function of things, and explain the principles, meanings, characteristics, and evolution of things. Expository essays are very practical, and they include advertisements, instructions, synopses, tips, rules, bylaws, explanations, etc. Some expository texts are chronological, some are spatially ordered; Some are written from phenomena to essence, and some are written from primary to secondary; Some are explained in the order of the technological process, and some are explained in the order of the nature, function, and principle of things.

The expository essay is to explain the shape, nature, characteristics, causes, relationships, functions, etc. of things clearly, so that people can see them at a glance and understand them correctly. Therefore, scientificity is the first element of expository essays, and if they lose their scientificity, expository essays have no value. First, the content should accurately reflect the face of objective things.

The differences between the two are as follows: the popular science expository essay is more accurate and simple, focusing on the explanation of the problem itself, rather than the method of expression; The literary and artistic expository essays, such as a scientific sketch about goldfish scientists, show the scientific problems of space and cognition through the eyes of goldfish and in a literary anthropomorphic way! It is more literary, and interprets things through the proof of non-purely scientific data.

It is to truthfully reflect objective things, and to reflect correctly is scientific. Otherwise, it is unscientific.

1. The content cannot be unrealistic.

2. The language is measured and cannot be exaggerated.

Generally, technical explanatory texts are manuals.

Human blood. The red blood that flows in the human body is whole blood composed of red blood cells, white blood cells, platelets, plasma, and other components. At present, advanced medical technology emphasizes the transfusion of blood components, and in many cases of clinical use, whole blood is not required, and only one or several blood components are used. Therefore, artificial blood does not need to be exactly the same as whole blood composition.

Plasma substitutes are now available on the market, platelet substitutes have been studied, and many countries are currently focusing on the development of erythrocyte substitutes. The main function of red blood cells in the blood is that the hemoglobin in red blood cells carries oxygen. If hemoglobin, which is responsible for transporting oxygen molecules, can be synthesized, the key problem of artificial blood will be solved.

Since it is life-saving blood, safety is naturally the first need. Because of the virus removal or inactivation process incorporated into the artificial blood preparation process, the infusion of artificial blood can avoid the spread of disease due to blood-contaminated sources. In addition, the transfusion of artificial blood eliminates the need to consider the matching of different blood types.

When we talk about blood type, we generally refer to ABO blood group, which is classified according to the antigen contained in the red blood cell membrane. Because artificial blood composed of hemoglobin does not have a red blood cell membrane, there is no antigen and will not cross-react with the existing antibodies in the body, so artificial blood is suitable for any blood type, and the human body will not reject it, and it can truly achieve "one blood universal". Especially in the case of emergency rescue, doctors only need to directly inject artificial blood for the patient, instead of having to test the patient's blood type first, and then spend time searching for the matching blood, saving a lot of valuable time.