precious smith
Stories (2)
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Who is not familiar
You may ask, "Air? Who is not familiar with it, and what is wonderful about it?" Yes, air is very ordinary, but air also contains a lot of interesting knowledge, do you understand how air is composed? Do you understand why almost all living things can't live without air? Do you understand how carbon dioxide and water carve out the beauty of natural art? Do you understand how some poisonous gases are combined? First of all. We made a household book for the members of the air, and registered them in three categories. The first category consists of almost constant amounts of ammonia, oxygen and noble gases. In dry air without water vapor, ammonia accounts for 78 percent of the total volume, oxygen about 21 percent, and many other air members such as argon, nitrogen, and neon add up to only a few tenths of a percent. What a difference! The second category includes carbon dioxide, water vapor, dust particles and other variable content components. Strangely, they do not have a fixed proportion in the atmosphere, most of the time up to four percent of the total volume of the atmosphere, and less than one percent of the time. The third category is the members of the temporary account in the atmosphere, most of them are harmful gases, such as ammonia, sulfur dioxide, carbon monoxide, etc., there are thousands of kinds! In the constant content of the air member, people praise of course is oxygen. It is not that man harbors oxygen, but that oxygen does work for all living things. All living creatures need energy to carry out life activities, so where does this energy come from? Energy is stored in the organic matter of the organism, after the organism inhales oxygen, the oxygen has a wonderful chemical reaction with the organic matter that stores energy, and the organic matter is converted into inorganic matter, and the energy is released. This is the main property of oxygen. In addition, oxygen also contributes to plant photosynthesis, helps burn and many other properties. In the southwest limestone area of the motherland, there are strange peaks and caves, strange rocks like forests, and people are amazed at the superb skills of nature. So, who carved it? That's carbon dioxide and water. The main component of limestone is a calcium carbonate substance, when the water containing carbon dioxide and lime rock contact, calcium carbonate and carbon dioxide, water chemical reaction, the limestone dissolved into calcium bicarbonate, mixed in the water. After years of karst processes, the surface of the rock will appear in a variety of forms. At the same time, the water dissolved with calcium bicarbonate, due to the "escape" of carbon dioxide and the evaporation of water, will form a beautiful scenery such as stalactites and stalagmites. This is how carbon dioxide and water carve out the beauty of natural art. As mentioned before, there is a guy called sulfur dioxide in the air, and its "birth" is very interesting. Originally in coal, oil and other fuels, containing a small amount of sulfur, generally accounting for 1% to 7% of the total volume. Because combustion requires oxygen, during the combustion process, sulfur and oxidation, forming a gaseous form of sulfur dioxide released, sulfur dioxide can sometimes be converted into sulfur trioxide. In addition, air can also carry out a variety of combinations. For example, sulfur dioxide is vaporized with water to synthesize sulfuric acid fog, and nitric oxide and gas to synthesize nitrogen dioxide. They are toxic and contribute to air pollution.I have a warm and happy home. My father, mother, brother and I played a symphony of family harmony. Dad is in his late 50s, medium build. The hardships of the years caused him to show his white hair prematurely. Dad is very filial. I remember when I was young, my grandma was not in good health, and my father worked hard and took care of my grandma, working hard day and night, and never complained. Dad is also very hard-working, and everything in the family is always put away by dad. Especially the lively one in the middle of my small yard. Shed, is my father's masterpiece, is also the capital I show off among the children, a shed is my father built with steel pipes in the courtyard of my home, each steel pipe cross-tied, in a "field" shape, and coated with anti-rust paint, tall, very beautiful. Every spring season, dad put bitter melon ah, luffa ah, gourd ah seeds in the soil on both sides of the shed, such as seeds break the ground and sprout, grow tender seedlings. Dad fertilized and watered them and led them up to the shed with a rope. After dad so, so these seedlings and he like a magic scramble to climb up, soon covered the whole shed, and opened colorful flowers, bearing various shapes of fruit, hanging down on the shed. Many children and uncles and aunts came to my house to watch. Networking to identify and translate... My mother is hardworking and virtuous, gentle temper, popularity is very good, and she is in good order at home and abroad, which is the backbone of my family. My brother is the pride of our family. Just graduated from university this year, and admitted to Wuhan University postgraduate. However, my brother is not a nerd, every holiday home, will bring me a few story books and some small gifts. My home is a lovely home. Although the place is not big, but when I am injured, it can give me warmth, give me expectations, I love my home!
By precious smith3 years ago in Gamers
Speaking of the campus. Content Warning.
Speaking of the campus, it will remind us of the sound of reading, think of the campus, it will promote to remind us of the teacher's friendly voice. Today, I will introduce my campus. My campus is located in Shenzhen Nanshan Baishizhou, walk into the campus, you will see a big pillar, there are eight striking characters, that is, the famous calligraphy master Qigong wrote the word, written is: self-improvement, loyalty and trustworthiness. Our school has a total of five teaching buildings, one is for the teacher's office, the other four are for students to study, do you think our school's teaching buildings are perfect? Coming to the playground, you will see an oval red plastic track and a large green football field. There is a stage in front of the playground. Next to the stage are steps. When the school holds a show, some small audience sit there. There are four basketball courts around the playground. In the diagonal back of the playground is the canteen, above the canteen is the dormitory where we rest at noon. Whenever we want to go to the art class at noon, we have to pass the botanical garden. There are countless varieties of flowers and trees in the botanical garden, in order to facilitate the senior students to raise silkworms, the botanical garden also specially planted a few mulberry trees! There is also a long art gallery in our school. Whenever we pass by, we can't help stopping to read the information of famous people in art or some pictures related to art. This is our campus, quiet, interesting and full of fun campus, I love my campus!This is the call of the heart, this is the dedication of love, this is the spring breeze of the world, this is the source of life. There is no desert of heart, no wasteland of love, death is afraid, and the flowers of happiness are everywhere. When I was little, love was a lollipop. Grow up, when began to laugh at the idea of childhood childish, the love in the heart, is that kind of vigorous, moving things; When I am older, I feel that I have grown up, and when there is a conflict between parents and teachers, I do not know what love is, only that I always hope, always desire; Then, to their own really slowly mature, gradually, there is a new understanding of love, but this understanding is like a blur of shadow, always can not find the clue. Love, just behind the shadow, but slow to show its true face. I am always trying to find, trying to grasp, but it is like playing hide-and-seek with me, sometimes drifting in, sometimes disappearing without a trace, looming, no home. Until I gave up the search and slowly calmed down, I was surprised to find that love is around me, always with me. That is a kind of heart throbbing feeling, a kind of moved want to cry. Feels. When you close your eyes and really feel love, you feel warm. Si Su flew..... I began to think that love is silent. It never left me, but I never knew how to cherish it. It quietly surrounded me, wrapped me warm, let me not hurt, give me happiness, give me laughter. Perhaps I am fragile, immersed in the happiness of being loved, but I always return with tears. But maybe this is what I really feel in my heart, love is gratitude, it is hope, it fills me with strength, it makes my heart happy, it makes my heart peaceful, it makes me see. Love is the least human feeling, Wei Wei sang: "As long as everyone gives a piece of love, the world will become a beautiful world." Yes, hand in hand, love is always around you, hold my hand, look at the rainbow tomorrow. Let the world be full of love forever!
By precious smith3 years ago in Art
