Information and background of the first snow.

Formerly known as Sun, he is a famous contemporary writer in China. Born in 1922. A native of Xilouzi Village, Haiyang County, Shandong Province. The young family is very poor. They only attended primary school for a few years, and they became child laborers at the age of thirteen. After the outbreak of War of Resistance against Japanese Aggression, he engaged in education and mass work in the local anti-Japanese democratic government. His first work was written in 194 1. 1944. He used to be a reporter of the Jiaodong District Party Committee's organ newspaper "Popular Daily", an army reporter of Xinhua News Agency's front branch, and an armed squad leader behind enemy lines. /kloc-in the spring of 0/948, he went south with the army and worked as a reporter for Xinhua News Agency in the Central Plains. Later, it was transferred to Central Plains Daily and Central South China People's Broadcasting Station. 1952 transferred to Zhongnan Federation of Literary and Art Circles for professional creation. Later, he was transferred to Shanghai and served as Acting Party Secretary of Shanghai Branch of Writers Association. 1957 Secretary of the Secretariat of Shanghai Branch of Writers Association. 1960 was elected director of the Chinese Writers Association. His main works are short stories by the River at Dawn, Haiyan, Final Report, Jiaodong Chronicle and Angry Waves. The novel Tsunami; Prose collection "Autumn Color Fu" and "European Letters". There is also a collection of essays co-written with others, which is about the writing of short stories.

The First Snow is an essay written by Jun Qing in the rural area of Jiaodong Peninsula in 1962. At that time, China suffered from natural disasters for several years in succession, resulting in poor harvest of grain and cotton, and people were looking forward to a bumper harvest year. By describing the first snow in Jiaodong Peninsula since winter and its association, the author expresses his joy at this heavy snow that indicates a good year. The First Snow is an essay written by the writer Jun Qing in the countryside of Jiaodong Peninsula on 1962. As the Soviet Union was the first country to become a * * * country, when we were going to become a * * * country, the Soviet Union came to help us, guided us to the road of development and lent us a lot of money. However, in 196 1 year, the door to get rich opened by the Soviet Union suddenly closed, and China was asked to return the money borrowed by the Soviet Union as soon as possible. So Mao Zedong said: "Even if you tighten your belt and eat grass roots, you must return the money borrowed from the Soviet Union!" So natural disasters happened in these three years, and several people starved to death. /kloc-in the winter of 0/962, it snowed, which reminded the author of the proverb "there is more snow", and he was very happy, so he wrote "the first snow" excitedly.

Jun Qing is a modern writer and a native of Haiyang, Shandong. This article was written in 1962. 1960- 1962 is the period when China suffered from natural disasters. In the past three years, the crops of grain and cotton have failed. How people look forward to a bumper harvest! /kloc-in the winter of 0/962, the author saw the first snow in Jiaodong Peninsula and was very happy to think of it. He couldn't restrain his inner joy and wrote this essay "The First Snow".

The First Snow is an essay written by the writer Jun Qing in the countryside of Jiaodong Peninsula on 1962. At that time, China suffered from natural disasters for several years in succession, resulting in poor harvest of grain and cotton, and people were looking forward to a bumper harvest year. By describing the first snow in Jiaodong Peninsula since winter and its association, the author expresses his joy at this heavy snow that indicates a good year. The First Snow is an essay written by the writer Jun Qing in the countryside of Jiaodong Peninsula on 1962. As the Soviet Union was the first country to become a * * * country, when we were going to become a * * * country, the Soviet Union came to help us, guided us to the road of development and lent us a lot of money. However, in 196 1 year, the door to get rich opened by the Soviet Union suddenly closed, and China was asked to return the money borrowed by the Soviet Union as soon as possible. So Mao Zedong said: "Even if you tighten your belt and eat grass roots, you must return the money borrowed from the Soviet Union!" So natural disasters happened in these three years, and several people starved to death. /kloc-in the winter of 0/962, it snowed, which reminded the author of the proverb "there is more snow", and he was very happy, so he wrote "the first snow" excitedly.

Snow always represents beauty. Because snow is beautiful and pure, it brings a bumper harvest to crops. Because the author wants to make people happy and give them blessings.

snow

The role of snow

Snowflake is a kind of beautiful crystal, which sticks together to form snowflake during falling. The size of a single snowflake is usually between 0.05 and 4.6 mm, and the snowflake is very light, with a single weight of only 0.2-0.5 g. No matter how small a snowflake is, it is wonderful. Its crystals are all regular hexagons. Therefore, the ancients said that "there are five flowers in vegetation and six snowflakes". How beautiful and light the snowflake is! I like snowflakes more and more. If I can witness the snow-covered earth and the silver-covered green trees again, it will really be a pleasure.

"Xue Rui heralds a bumper harvest year" is an agricultural proverb widely circulated in China. In the north, a thick layer of loose snow is like covering wheat with a quilt to keep out the cold. The cold nitrogen in snow is easily absorbed and utilized by crops. The low temperature of snow water can freeze the overwintering pests on the surface and bring benefits to agricultural production. So there is another agricultural proverb, "wheat covers three layers in winter and sleeps with steamed bread in the next year."

Snow has a wide range of functions, but it is of great benefit to mankind. First, it is beneficial to the growth and development of crops. Because of the poor thermal conductivity of snow, covering the soil surface with a layer of snow cover can reduce the diffusion of soil heat and block the invasion of cold air on the snow surface, so the crops protected by snow can survive the winter safely. Snow can also store water for crops. In addition, snow can enhance soil fertility. According to the determination, every 1 liter of snow water contains about 7.5 grams of nitride. Snow water permeates the soil, which is equivalent to applying nitrogen fertilizer once. Feeding livestock and poultry with snow water and irrigating crops can obtain obvious benefits.

Snow is both beneficial and harmful to people. In mid-spring in March and April, if it suddenly snows because of the cold wave. It will cause severe cold. Therefore, the agricultural proverb says, "La Xue is a treasure, but Chun Xue is not good."

Effects of Snow on Human Health

In winter, it snows endlessly. People often ignore the role of snow when watching Yushu Qionghua. Snow has many benefits to human health. Compendium of Materia Medica has long recorded that snow water can detoxify and cure the plague. There is a folk prescription for treating fire burns and frostbite with snow water.

Taking a bath with snow water often can not only enhance the resistance between skin and body, reduce diseases, but also promote blood circulation and enhance physical fitness. Drinking clean snow water for a long time can prolong life. This is one of the "secrets" of those who have lived in the deep mountains and forests for a long time.

Why does snow have such strange functions? Because snow water contains less heavy water than ordinary water 1/4. Heavy water will seriously inhibit the life process of living things. After testing, fish will die quickly in water containing 30-50% heavy water. The most basic condition for the formation of rain and snow is the existence of "condensation nuclei" in the atmosphere, and solid impurities such as dust, coal particles and minerals in the atmosphere are the most ideal condensation nuclei. If meteorological factors such as water vapor and temperature in the air reach certain conditions, water vapor will condense into snowflakes around these condensation nuclei. Therefore, snowflakes can clean a lot of pollutants in the air. So every time after the heavy snow, the air is particularly fresh.

According to the measurement, the density of new snow is generally 0.05-0. 10g per cubic centimeter. Therefore, the reflectivity of ground snow to sound waves is extremely low, which can absorb a lot of sound waves and help reduce noise.

Thermal insulation function of snow

Snow is like a wonderful carpet, covering the earth, so that the temperature of the ground will not drop too low because of the cold in winter. This heat preservation effect of snow is inseparable from its own characteristics.

As we all know, it is warm to wear a cotton-padded jacket in winter. Why is it warm to wear a cotton-padded jacket? This is because the porosity of cotton is very high, and the pores of cotton are filled with a lot of air, which has poor thermal conductivity. This layer of air prevents the heat of human body from spreading outward. The snow covering the breast of the earth is very similar to cotton, and the porosity between snowflakes is very high. It is this layer of air that drills into the pores of the snow to protect the ground temperature from falling very low. Of course, the thermal insulation function of snow changes with the density at any time. It's like wearing a new cotton-padded jacket, which is especially warm, and the old cotton-padded jacket is not very warm. The density of fresh snow is low, and there is a lot of air stored in it, so the heat preservation effect is particularly strong. Chen Xue is like an old cotton-padded jacket, with high density and weak heat preservation effect, because there is less air stored in it. Why does the more air an object stores, the stronger the heat preservation effect?

This is because air is a bad conductor. As we know, any object itself can transfer heat, and this property of transferring heat is called the thermal conductivity of the object. Among several common substances in nature, air has the worst thermal conductivity. Therefore, the more air an object contains, the worse its thermal conductivity. Because the amount of air contained in snow changes greatly, the thermal conductivity of snow also changes greatly. Generally, the newly fallen snow has large pores and the best heat preservation effect. In the late stage of snow melting in spring, snow is soaked by water, and its thermal conductivity is closer to that of water, so the thermal insulation effect of snow tends to disappear.

nivation

Erosion caused by frequent melting and frost heaving of snowfields in periglacial climate. Snow erosion occurs in polar and sub-polar regions without ice sheets, as well as in alpine regions below the snow line and above the tree line. The annual average temperature there is about 0℃, which belongs to permafrost region. On the one hand, the alternate freezing and thawing of the edge of the snowfield destroys the surface material through ice cracking; On the one hand, snow melting will take away the crushed fine substances, so snow erosion includes two functions: denudation and transportation. With the deepening of the bottom of the snowfield and the expansion of its periphery, a wide and shallow basin-shaped concave land with small peripheral slope is gradually formed on the hillside, that is, the snow melting concave land. Its shape, origin and spatial distribution are different from those of ice buckets, but they are related. When the climate becomes cold and the snow line drops, the snow-eroded depression can develop into an ice bucket; On the contrary, when the climate warms and glaciers recede, ice buckets can degenerate into snow-melting depressions. Under different natural and geographical conditions, the way and speed of snow erosion are different. Where the latitude is low, the precipitation is high and the freezing and thawing days are many, the snow erosion rate is faster, and the snow erosion is deep and large. For example, snow erosion is very common in Xiaoxing 'anling area of Northeast China. On the contrary, snow erosion is weak in places with high latitude, little precipitation and low temperature in summer. The influence of ground slope is: the slope is steep > 40, and the snow field is not easy to exist; Snow erosion on the flat land is slow; Snow erosion is most active on the slope of about 30.

In winter, it snows endlessly. People often ignore the role of snow when watching Yushu Qionghua. Snow has many benefits to human health. Compendium of Materia Medica has long recorded that snow water can detoxify and cure the plague. There is a folk prescription for treating fire burns and frostbite with snow water.

Taking a bath with snow water often can not only enhance the resistance between skin and body, reduce diseases, but also promote blood circulation and enhance physical fitness. Drinking clean snow water for a long time can prolong life. This is one of the "secrets" of those who have lived in the deep mountains and forests for a long time.

Why does snow have such strange functions? Because snow water contains less heavy water than ordinary water 1/4. Heavy water will seriously inhibit the life process of living things. After testing, fish will die quickly in water containing 30-50% heavy water. The most basic condition for the formation of rain and snow is the existence of "condensation nuclei" in the atmosphere, and solid impurities such as dust, coal particles and minerals in the atmosphere are the most ideal condensation nuclei. If meteorological factors such as water vapor and temperature in the air reach certain conditions, water vapor will condense into snowflakes around these condensation nuclei. Therefore, snowflakes can clean a lot of pollutants in the air. So every time after the heavy snow, the air is particularly fresh.

According to the measurement, the density of new snow is generally 0.05-0. 10g per cubic centimeter. Therefore, the reflectivity of ground snow to sound waves is extremely low, which can absorb a lot of sound waves and help reduce noise.

Winter snow

Girls in winter wear silvery white dresses and winter presents.

In an instant, large tracts of snowflakes danced like thousands of silver butterflies and flew to the world. Snowflakes, more and more dense, like cotton wool, like reed flowers, like dandelion fluff seeds. In a short time, thick white down jackets were woven on bare branches, bare soil and roof. Willow branches are covered with fluffy shiny silver bars, while those pines and cypresses are covered with fluffy and heavy snowballs. A gust of wind blew, silver bars and snowballs rustled down, and snowflakes danced with the wind. The trees on both sides of the road are full of silver flowers, and the buildings shine with dazzling Yin Hui like Qionglou Yuyu. Heaven and earth are completely integrated. Ah, what a world wrapped in silver! We seem to live in a fairy tale world, giving people infinite reverie. ...

Over the years, many famous sentences have praised her: "Snowflakes on swallows are as big as seats, blowing down Xuanyuantai", "It's cold in Whitestorm, and the snowflakes are big", "Yulong lost 3 million and was covered with bruises all over the sky", what a spirit! How much joy and longing the snowflake has brought to the workers. She is also a "prophet" of harvest-snow indicates a bumper harvest year.

Snow, you are the messenger of winter and the source of children's happiness. Winter is vivid and beautiful because of you.

My classmates and I have been looking forward to snow all winter, but it is always warm and we can't see your shadow.

Finally, the cold air came. One morning, I saw you falling from the sky in the cold wind, falling like rain, a gust of wind blowing, and you flying all over the sky like fine salt scattered in the sky. Everyone was surprised to see your figure: "It's snowing! It's snowing! " The students all leaned their heads out of the window and were very happy.

After class, we all came to the corridor to enjoy the snow. You are happier when you see the smiling faces of children. It's snowing even harder. Clusters of snowflakes fall down on the ground, trees and roofs, and on everyone's face and hands. Goose feathers and snowflakes are flying in the sky like torn cotton wool. The snow is floating like a white net. The distant scenery is shrouded in white, and everything in front of you is stained with your brilliance.

The snow in the afternoon has covered the earth with a layer of silver, like wearing a thick winter coat, but it still seems that it can't satisfy everyone's wishes and continue to go underground. After a while, the snowflakes here floated down slowly, like light goose feathers; After a while, the snow there was pounding violently, like a little dancer dancing, what a brisk figure, what an elegant dance, what a lively gesture. I secretly admire in my heart: oh, what a magical snowflake, I like you!

I tried to warm it with my hands, when the snow turned into water. Ah, the snow was moved to tears. I took a deep breath, ah, the coolness and sweetness of the snow came to my mind. This is your pure heart, your warm dedication and our sincere friendship.

The next day, when you are tired, rest quietly. When people open the windows, they see a thick layer of snow on the trees, roads and roofs, covering the whole mountain area. The earth is white, like a thick quilt, wrapped in silver, and the air is particularly fresh. The snow soon boiled, and friends played happily in the snow.

"Like the strong wind in spring, it blows at night and blows open the petals of ten thousand pear trees." Ah, Xue, you are a beautiful fairy, you are a white angel, and you are my happy childhood partner.

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