Write a procedural exposition

Write a common sense exposition 1. A common sense exposition

is an exposition whose main purpose is to introduce the object clearly.

there are many ways to introduce common sense, and the commonly used ones are:

(1) define. Point out the essential characteristics of the explained object in concise language, and distinguish those objects that are easy to be confused with it, which is called definition. For example, "overall planning method is a mathematical method to arrange the work process".

(2) classification. Classifying the explained objects into different categories according to certain standards and explaining them one by one is called classification. For example, Where Does Food Come from divides the ways and methods for organisms to obtain food into two categories: autotrophic and heterotrophic, and then explains them separately.

(3) give an example. Give examples to illustrate and concretize the content, which is called examples. "China Stone Arch Bridge" introduces Zhao Zhouqiao and Lugou Bridge, so that people can know the characteristics of China's stone arch bridge in detail, with examples.

(4) column numbers. Using accurate data to explain some aspects of things is called listing numbers. For example, "the pen is 13.5 cm in length, the pen body accounts for about 3/5, and the pen cap accounts for about 2/5. The movable small hub at the top can freely extend and retract, like a black * *, with a length of .7 cm and a pen hanging length of 3.9 cm. " (my ballpoint pen)

(5) for comparison. It is to explain things and things by comparison. For example, in Suzhou Garden, the asymmetry of Suzhou garden architecture is compared with the symmetry of ancient palaces and modern general houses in China, highlighting the natural beauty of Suzhou gardens.

(6) for example. Comparing the similarities between two things to highlight the characteristics of things and enhance the vividness and vividness of the explanation is called analogy. "The bridge opening of the stone arch bridge is curved, just like a rainbow." The image accurately illustrates the shape characteristics of the stone arch bridge, and this sentence is explained by analogy.

(7) draw a chart. Sometimes, it is difficult to be clear and specific by using words alone. At this time, it can be supplemented by drawing a list. This method is called drawing a chart. This explanation method is used in the article "Overall Planning Method".

(8) citation. The range of materials is very wide, which can be classic works, famous sayings, formula laws, allusions and proverbs.

2. Lesson 9 of Grade Five Chinese This article belongs to a common sense expository, and the explanatory methods are as follows: column

The object of this article is spider silk. Linguistically speaking, this article belongs to an expository.

The object of this kind of explanatory text is specific things, and the purpose of explanation is to make readers understand and know the characteristics of things. Reference: The object described in this article is ().

linguistically, this article belongs to the () type of expository text. This paper introduces a new exploration of the mystery of cobweb. Why take the spider as an example? Tell me your understanding.

what two types of spider silk are cobwebs made of? What are the functions of these two types of spider silk? What do scientists mean by their new discoveries about the mystery of cobwebs? Summarize the answer in your own words, because round beads are common dry silk and wet silk. The outer traction line and radial radius line of the net are dry wires, which are basically non-sticky, but form a large frame to fix and support the hunting net.

the traction line is thick and can be called the main rope. The spirals on this skeleton are wet filaments, which are not only very viscous, but also very elastic. This is a real hunting net.

the small area in the center of the spider web is not sticky, which is where the spider rests. Dry silk is not elastic. When it is stretched and its length increases by about 2%, it will break.

wet silk is quite different, its length is increased by three times, and it can still bounce back and return to its original state. Therefore, it is difficult for mosquitoes and flies caught to escape through the net (find the main point). Spider webs can contribute to bionics.

3. Write an essay on the topic of "common sense"

Charming common sense

People should learn from the land, the land should learn from the heaven, the heaven should learn from the Tao, and the Tao should be natural. -Lao Tzu

As early as 2, years ago, Lao Tzu revealed to us what common sense is. In fact, nature is a kind of common sense, which does not need too much exploration. It is an objective existence, but it has always been ignored by us. Common sense has its relativity. Of course, what we have to do is to apply common sense to our lives.

For a farmer, ploughing, transplanting, irrigation and harvesting in agriculture are common sense; For a college student, addition, subtraction, multiplication and division in operation are common sense; For a stockholder, entering positions, covering positions, bear markets and small-cap stocks in the stock market are common sense; For a chef, frying, boiling, frying and frying in cooking is a common sense; However, for a baby, eating, drinking, pulling and sleeping is a kind of common sense ... But as long as the object changes, common sense becomes advanced applied knowledge. You can't let a farmer's uncle do advanced physics problems with a pen, and let a baby go to farming, etc. It is very irrational, because common sense is relative, and common sense is like "whether there is a mutual existence, whether it is difficult or not, and the length is different." "Know, on; I don't know, I'm sick. "We are not saints. There is too much common sense in everything in the world. We can't all understand. Knowing is knowing, and not knowing is not knowing, so we should keep studying hard.

Of course, no matter how much common sense a person knows, it's useless to stay in study. You have to know how to use it! "Big, big, big, National People's Congress. There are four big areas in the domain, and human beings are one of them. "As a member of nature, human beings should contribute their own abilities to transform nature and make nature and human life more harmonious and beautiful. Water conservancy experts all know that blocking, dredging, discharging and storing are common sense for flood control, but so far there are still floods in China. As early as the end of the Warring States Period, Li Bing of Qin designed Dujiangyan, which is "deep scouring the beach, low weir, cutting corners when encountering a bay, and pumping out the heart", completely solving local water disasters and turning harm into benefit. Sichuan has become a "land of abundance", which is also a water control and Dayu. Chinese medicine practitioners all know that it is common sense to look, smell, ask and feel anxious. According to legend, Hua Tuo's master was ill, and all the other disciples were unable to make a diagnosis. In the end, Hua Tuo also looked and asked, and concluded that the master was faking his illness. Finally, his master also admitted that the same master taught him medical skills and the same method of diagnosis and treatment, and Hua Tuo made a diagnosis and treatment right, but all the other disciples failed. For military strategists, all kinds of marching, disposal, offensive and defensive strategies are common sense. During the Warring States Period, Qi Zhao War, Lian Po used deep trenches and high bases for defense. However, after changing Zhao Kuo, Zhao Kuo's ability to talk on paper was of course defeated, and 4, Zhao troops were sacrificed in vain, that is, the famous Changping War ... All kinds of signs can explain that even if you learn countless common sense, you will learn it in vain if you don't use it, so we.

In my common sense, common sense is like this. It has its relativity, but it is more important to use common sense to change life actively!

I only found this for the time being.

if you are in Chaoyang experiment, don't copy it. (It's hard for you and me if you are the same. Haha)

4. Common sense explanation (5 words) Urgent

Common sense of fire fighting and extinguishing 1. Solid fires should be put out with water-type, foam, ammonium phosphate dry powder and halon fire extinguishers first.

2, liquid fire should be put out with dry powder, foam, halon and carbon dioxide fire extinguishers. 3, gas fire should be put out with dry powder, alkyl halide, carbon dioxide fire extinguisher.

4. Fire of charged objects should be put out with halon, carbon dioxide and dry powder fire extinguishers first. 5. Fire fighting equipment for metal fires should be solved through consultation between the design department and the local public security fire supervision department. At present, there is no regular fire extinguisher product in China.

6, the use of fire extinguishers and fire fighting methods can refer to "the use of fire extinguishers". How to use the fire extinguisher Classification of fire extinguishers There are many kinds of fire extinguishers, which can be divided into: portable and cart-type; According to the power source of driving fire extinguishing agent, it can be divided into gas cylinder type, pressure storage type and chemical reaction type, and according to the filled fire extinguishing agent, it can be divided into foam, dry powder, alkyl halide, carbon dioxide, acid and alkali, clear water and so on.

fire extinguisher adaptation and use method (portable) 1. foam extinguisher adaptation and use method is suitable for fighting general Class B fires, such as oil products, grease and other fires, as well as Class A fires, but it can't fight water-soluble flammable and combustible liquids in Class B fires, such as alcohol, ester, ether, ketone and other substances; It is also impossible to put out live equipment and class C and D fires. Usage: You can carry the lifting ring on the upper part of the barrel and go to the fire quickly.

at this time, care should be taken not to tilt the fire extinguisher excessively, let alone to hold it horizontally or upside down, so as to avoid mixing the two chemicals and spraying it in advance. When it is about 1 meters away from the ignition point, the cylinder can be turned upside down, one hand holds the bail tightly, and the other hand holds the bottom ring of the cylinder, aiming the jet at the combustion product.

When putting out the flammable liquid fire, if it is already burning in a flowing state, spray the foam from far to near, so that the foam completely covers the burning liquid surface; If burning in a container, the foam should be shot at the inner wall of the container, so that the foam will flow along the inner wall and gradually cover the fire level. It is forbidden to spray directly at the liquid level, so as to avoid the burning liquid being scattered or rushed out of the container due to the impact of the jet, and expand the combustion range.

when putting out the fire of solid matter, the jet should be aimed at the place where the burning is the fiercest. When extinguishing fire, with the shortening of effective spraying distance, users should gradually approach the burning area, and always spray foam on the burning objects until it is extinguished.

when in use, the fire extinguisher should always be kept upside down, otherwise it will interrupt the spraying. (Portable) foam extinguisher should be stored in a dry, cool, ventilated and convenient place, not near high temperature or places that may be exposed to sunlight, so as to prevent carbonic acid from decomposing and failing; Anti-freezing measures should be taken in winter to prevent freezing; And should always wipe the dust and dredge the nozzle to keep it unobstructed.

2. The cart-type foam extinguisher adapts to the fire and its use method is the same as that of the portable chemical foam extinguisher. Usage: When using, it is generally operated by two people. First, push and pull the fire extinguisher to the fire site quickly, and stop at a place about 1 meters away from the fire point. After applying the spray hose by one person, hold the spray gun tightly with both hands and aim at the burning place; The other is to turn the handwheel counterclockwise to raise the screw to the highest position, so that the bottle cap is fully opened, then pour the cylinder backwards, so that the pull rod touches the ground, and rotate the valve handle by 9 degrees to spray foam to extinguish the fire.

if the valve is installed at the spray gun, the person in charge of operating the spray gun will open the valve. Fire extinguishing methods and matters needing attention are basically the same as those of portable chemical foam extinguisher, which can be referred to.

Because of its long spraying distance and long continuous spraying time, this kind of fire extinguisher can give full play to its advantages and be used to put out the initial fire in large-area storage tanks or oil tankers. 3. Adaptation of air foam extinguisher to fire and application scope: The application scope is basically the same as that of chemical foam extinguisher.

However, the solvent-resistant foam extinguisher can also put out the fire of water-soluble flammable and combustible liquids, such as the initial fire of burning solvents such as alcohol, ether and ketone. Usage: When in use, you can quickly rush to the fire site by hand or shoulder. When it is about 6 meters away from the burning material, pull out the safety pin, hold the opening handle with one hand and hold the spray gun with the other; Squeeze the opening handle hard, open the seal or pierce the sealing piece of the gas cylinder, and the air foam can be ejected from the nozzle of the spray gun.

the fire extinguishing method is the same as that of portable chemical foam extinguisher. However, when the air foam extinguisher is used, the fire extinguisher should always be kept in an upright position, and it should not be used upside down or horizontally, otherwise the spraying will be interrupted.

at the same time, always hold the opening handle tightly, and don't let go, otherwise the injection will be interrupted. 4. Adaptability of acid-base fire extinguisher to fire and its application scope: it is suitable for extinguishing the initial fire of class A substances, such as wood, fabric, paper and other fires.

it can't be used to put out fires caused by the burning of class B substances, nor can it be used to put out fires caused by class C combustible gas or class D light metal. At the same time, it can not be used to put out the fire of charged objects.

usage: when using, you should lift the ring on the upper part of the barrel and rush to the fire site quickly. Never carry the fire extinguisher on your back, nor tilt it too much to prevent the two liquids from mixing and spraying in advance.

When it is about 6 meters away from the combustible materials, the fire extinguisher can be turned upside down and shaken several times to speed up the mixing of the two liquid medicines; Hold the bail with one hand, and hold the bottom ring under the cylinder with the other hand to aim the jet at the most violent burning place. At the same time, with the decrease of injection distance, the user should push closer to the burning place.

5. How to use the carbon dioxide fire extinguisher. When putting out the fire, just lift or carry the fire extinguisher to the fire site. When it is about 5 meters away from the burning objects, put down the fire extinguisher and pull out the safety pin. Hold the handle at the root of the horn with one hand and hold the pressure handle of the on-off valve with the other. For a carbon dioxide fire extinguisher without a spray hose, the horn should be 7-9 degrees to the upper plate.

When using, you should not directly grasp the outer wall of the horn or the metal connecting pipe with your hands to prevent your hands from being frostbitten. When putting out fire, when the combustible liquid burns in a flowing state, the user sprays the jet of carbon dioxide extinguishing agent from near to far to the flame.

if combustible liquid is burning in the container, the user should lift the horn. Spray from the upper part of one side of the container into the burning container.

However, the carbon dioxide jet can't directly impact the combustible liquid surface, so as to prevent the combustible liquid from being washed out of the container and expanding the fire, which makes it difficult to put out the fire. Generally, the cart type carbon dioxide fire extinguisher is operated by two people. When in use, the two people push or pull the fire extinguisher to the burning place together, 1 meters away from the burning material.

5. Common-sense expository writing is urgent

The so-called expository writing is an article that gives people knowledge by explaining things and things as the main way of expression. It makes people understand the shape, structure, nature, types, causes, functions and relationships of things or the concepts, characteristics, sources, evolution and reasons of things through the explanation of substantive things or the explanation of abstract arrangement. Giving priority to explanation is a sign that explanatory writing is different from other styles in expression.

among all kinds of article styles, descriptive style is a relatively independent category. In people's social life, expository writing shows its important role and practical value. Real life fully shows that expository writing is not an insignificant article form, but a widely used common style, which is closely related to people's production, work and life, and because of the needs of social life, expository writing is emerging in large numbers.

With regard to the classification of expository texts, people have different ways to classify expository texts from different angles and according to their own standards. According to the expressive methods of expository writing, we can generally divide it into three categories: first, explanatory expository writing; Second, narrative explanatory text; Third, the literary expository text.

Explain things from several different aspects.