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Expository Essay Expository essay is a genre of essay that uses explanation as the main expression to explain things, clarify things and give people knowledge.

It illustrates the characteristics, essence, and regularity of things by revealing concepts. The expository essay is very practical, it includes advertisements, instructions, synopses, tips, rules, charters, explanatory words, scientific sketches, etc.

In general, expository texts generally consist of three specific styles:

1. With a certain literary and artistic nature, it refers to scientific sketches, such as "Nanzhou June Lychee Dan".

Second, popular science, such as "March to the Desert".

What's in the Universe

3. Practicality, such as instructions, explanations, etc.

Expository essays generally introduce the shape, structure, category, relationship, and function of things, and explain the principles, meanings, characteristics, and evolution of things. "Shangshu Yugong" is the earliest explanatory text in China.

Expository essays are widely used, and are generally divided into two categories: plain expository essays and literary expository essays, and expository essays can also be divided into two categories: explanatory essays and explanatory essays according to the different objects and purposes of explanations.

Literary expository essays are expository essays that introduce scientific knowledge in the form of literature and art.

Expository essays are characterized by "speaking" and have a certain amount of knowledge. This kind of knowledge, whether it comes from relevant scientific research materials, or is obtained through personal practice, investigation, and investigation, is strictly scientific. In order to explain things, it is necessary to grasp the characteristics of things, and then reveal the essential properties of things, that is, not only to explain "what", but also to explain "why" that it is so.

An applied expository essay generally only needs to explain the characteristics of the thing, while an explanatory expository essay must reveal the origin and essence of the problem.

The explanation of the expository text must be orderly, and the order of the explanation is arranged according to the order of the things themselves and the laws of human understanding. For example, the introduction of scenery and architecture is mostly arranged according to the geographical environment and orientation layout; The origin and evolution of things are mostly arranged in chronological order; The explanation of things is mostly in the logical order of things.

to arrange. In short, it is in a certain order, from the surface to the inside, from the real to the virtual, from the division to the combination, from far to near, from shallow to deep, step by step. Sometimes, in order to make others understand things more accurately, under certain circumstances, as long as they do not violate the characteristics and laws of things, they can also make certain adjustments in the order.

Explanation is an expression method of explaining things and dissecting and organizing. Depending on the object, the focus and level of the explanation will be different. When explaining physical things, it is generally necessary to pay attention to the location of the space; When explaining abstract facts, emphasis is placed on explaining concepts, characteristics, structures, types, similarities and differences, comparisons, connections, and functions.

Explain the method. There are many of them, and the common ways to explain them are defined.

Interpretation, comparison, analogy, categorization, examples, numbers, charts, etc.

History of the evolution of the house.

The house is a place for human beings to inhabit, a symbol of human conquest of nature and their own development.

It was only during the Banpo clan that humans created their own houses entirely by their own labor - stone houses built with their hands. The roof of this type of stone house is covered with grass and has a conical shape. The shape of the house is irregular, and half of the house is below the ground.

Several of these houses came together to form the village of the time.

Later, with the development of human culture and technology, people began to build houses according to pre-designed schemes. As a result, a large number of wooden houses and stone houses, as well as various forms of houses that are combined with wood, stone and soil, have been built in large numbers after people have been carved and scientifically spliced, and have developed into large-scale palace complexes and temple complexes. Due to differences in history, culture or customs, people of different nationalities have created different kinds of houses.

The bamboo building of the Dai nationality in Yunnan has two floors, the upper floor is inhabited, and the lower floor is tied to the horse, which is convenient, safe, cool and hygienic; The people on the high slopes of the loess took measures according to local conditions, dug the soil for houses, and built rows of caves that were warm in winter and cool in summer; The Mongolian people on the grassland have even built mobile house felt bags that shelter from the wind and snow and move at will. There are many kinds of houses, all of which express the hardships and greatness of human creation.

Modern houses have undergone tremendous changes in nature. People no longer rely solely on natural materials, but use artificial materials such as reinforced concrete, and pay more attention to the decoration of the interior and exterior of the house. For example, tiles are placed on the walls, and even gold dust is applied to make the house resplendent and dazzling.

These buildings, both in terms of structure and appearance, far surpass ancient houses.

People are engaged in activities in various kinds of houses, and it can be said that houses have become an indispensable part of the human living environment.

It is well known that humans have been separated from animals since the day they learned to make tools. Since humans can make and use tools, of course, while filling their stomachs, they also think of creating a comfortable habitat for themselves.

Modern society has entered a period of rapid development of science and technology. There has been a new breakthrough in the performance and function of the house. For example, there are houses that can withstand **.

A castle-shaped house in California, USA, withstood 6 level 2**, but was "unmoved"; Some houses can simulate the space environment outside the earth and become space stations on the earth.

Modern houses are no longer just shelters for people to shelter from the wind and rain, but also provide laboratories and workshops for human production, scientific research and all the development of modern civilization.

Due to the rapid increase in population, the demand for houses was so great that people had to move to the sky, so skyscrapers rose from the ground. According to statistics, a 300-storey skyscraper can live in the population of a medium-sized city.

With the development of science and technology and the increasing desire of human beings, in the future, human beings will not be satisfied with just living on the earth continent, and the emergence of "underwater dragon palaces", "planet villas" and "sky pavilions" will probably not be far away. Blue is better than blue.

Just make it clear around one thing.

Essays with explanatory methods such as numbers, analogies, examples, and comparisons are called expository essays.

It's about numbers, analogies, and so on.

Expository essay is a genre of essay in which explanation is the main mode of expression [1]. It makes people have a scientific understanding of the form, structure, nature, type, cause, function, relationship or concept, characteristics, evolution, and differences of things through the scientific explanation of physical things, the explanation of objective things or the interpretation of abstract things, so as to obtain relevant knowledge. The center of the expository essay is clear and prominent, the essay is scientific, organized, and the language is precise and vivid.

It illustrates the characteristics, essence, and regularity of things by revealing concepts. Expository essays generally introduce the shape, structure, and categories of things.

Airplanes, humans had du as early as a few thousand years ago

The dream of flying into the blue sky, how did human beings invent the flying dao machine, I had a big question mark in my heart, and I couldn't wait to go to Xinhua Bookstore to find information and research.

It turned out that as early as the Warring States Period, a scholar named Mozi invented kites, but his kites could only fly some very light things, but could not carry people.

When did humans invent airplanes? I continued to read with curiosity.

After thousands of years of research, finally on December 7, 1903, the Wright brothers of the United States successfully invented the world's first powered manned aircraft. Although their planes can only fly in the air for twelve seconds, they usher in a new era for the human dream of flying to the blue sky.

But how do humans reinvent themselves? I plunged headlong into the sea of books with questions in mind.

Due to the continuous increase in the flight speed of the aircraft, it often happens that the wings are broken and the planes are destroyed and people are killed. Over the years, scientists have solved this problem by reworking airplanes on dragonfly wings. It turns out that dragonflies have a thick spot at the end of their wings that is slightly heavier than the surrounding area, which is the key to preventing the wings from fluttering.

If we had known this, scientists would have spent less energy!

It refers to expository texts, that is, the written process of explaining, expounding, and explaining something through words. When I was in high school, I often wrote expository essays.

The puppy is a cute little animal, well-behaved, humane, and very likable. The dog's bark was loud, not big, not small, but full of energy. They are rich in color and have sensitive organs. Dogs are flexible by nature, and if you look closely, you will find it very interesting.

There are 32 desks in the classroom, neatly arranged in rows. These desks are like small boats, carrying us in the boundless ocean of knowledge.