The clear 'air' gave me the first breath and the beginning of a new day. When you walk out of the house, you take a SIP to ease your mood and move towards the beginning of a new day.
Walk into the school gate, fly to the shadow of basketball, carefree. Take a deep breath of the clear 'air' to bring you new self-confidence, hold the basketball and throw it into the box
Sometimes for me, the air is my antidote. When writing, look out of the window at the scenery, look at his composition. I started to write carelessly. I painted left and changed right. I only had the green scenery in my head. At this time, I was seen by the teacher in a panic. The teacher didn't say anything when he came. He just said: 'be calm when you write. Suddenly, I seemed to understand something. I took a deep breath of the air to get rid of my troubles. I'm writing that composition again.
Air is good for our health, but nowadays people are always polluting the environment. For example, the combustion of fossil fuels increases the concentration of particulate matter and SO2 in the atmosphere, endangers the health of people and other organisms, and corrodes materials, causing losses to human society; the discharge of industrial wastewater and domestic sewage worsens the quality of water, endangers the survival of aquatic organisms, makes the water lose its original ecological function and use value, and also pollutes the air It's polluted. If we don't stop it, it will be more serious and cause harm to our human body, so we need to protect the air.
'air' will give us health and clarity. If it is not well protected, it will no longer be healthy.
Guangdong Baoan District Shenzhen Baoan District primary school six air is not empty 1100 words in the boundless sky, it seems that in addition to the sun and moon, stars, rain, snow, hail, cloud and dust, halo, rainbow, lightning, lightning, bird insects and artificial objects, there is no other *, only empty space. In fact, this is an illusion. You know, there's a lot of air in the sky. However, in general, pure air is colorless and odorless, has no fixed shape, and has no fixed volume, so it is not easy for us to detect its existence, which leads to the above illusion.
The air is not empty. It has mass - the average air near the surface is 1 per cubic meter. Air is a mixture containing nitrogen, oxygen, carbon dioxide, water vapor, hydrogen, ammonia, acid vapor, methane, ozone, neon, argon and other rare gases. Dust is more or less suspended in the air. The earth's surface is surrounded by such a complex composition of air. It is more than 400 kilometers thick, called the 'atmosphere'. From bottom to top, it is divided into troposphere, stratosphere and ionosphere. The surface of all objects in the atmosphere bears the pressure of the atmosphere. The standard atmospheric pressure on the surface is 1033. 6 g / cm2.
One day, if there is no air in the sky, what terrible phenomenon will appear?
By then, there will be no wind on the earth. Scientific research tells us that the cold air is heavier, it will sink and gradually warm up, while the warm air is lighter, it will rise and gradually cool down, and there is convection between the cold and warm air, forming the wind. Without air, this convection will no longer exist, and naturally there will be no wind.
At that time, we will be almost deaf, and it will be difficult to hear other people speak and sing, and it will be difficult to hear other sounds in nature. It will be similar to living in a quiet environment. Although an object will make sound when it vibrates, if there is no medium to help it spread, we will not be able to hear it. Therefore, between our ears and the sound source, there must be a medium to transmit sound, which is mainly air. Without air, sound could hardly be transmitted.
In the earth's atmosphere, the air in the range of about 60 km to 400 km is ionized by the sun. This atmosphere is called the ionosphere. The ionosphere can reflect the short wave and ultra long wave in the radio wave. Using this characteristic of the ionosphere, we can carry out radio communication between thousands of kilometers. But without air, there would be no such communication.
The atmosphere is the umbrella of the earth.
First, it can reflect and absorb ultraviolet rays from the sun and other harmful rays from the universe. The stratosphere absorbs ultraviolet light. As we all know, there is a big hole in the ozone layer in the atmosphere above the earth's polar circle. Through this hole, the ultraviolet rays in the sunlight and other harmful rays in the universe will directly irradiate the earth's surface without hindrance, causing great damage to the organisms on the earth.
Secondly, it can make comets, asteroids and other uninvited guests who break into the atmosphere burn and burst in the process of high-speed flight in the atmosphere, making their volume large and small, and reducing the harm caused by meteorites falling to the earth.
Thirdly, the atmosphere is like a quilt on the earth's surface, effectively preventing the water and heat from escaping into space.
In addition, the atmosphere continuously transfers the heat from the sunny side of the earth to the sunny side, so as to maintain a general heat balance between the two sides and avoid the phenomenon of extreme heat on one side and extreme cold on the other.
Without the atmosphere, we will lose the protection in these aspects.
The most terrible situation is that without air, the vast majority of creatures will die, or even become extinct. Because the photosynthesis of plants is inseparable from the carbon dioxide in the air, and the respiration of animals is inseparable from the oxygen in the air. Fresh air, good weather, no rain trouble, is a good time for your morning exercise. Without the heat, the mood will naturally be better. Is Yao Yao ready for the college entrance examination tomorrow? Shijiazhuang 10-6 degrees clear cold index: easy to happen. The temperature difference between day and night is large, so it is easy to catch a cold. Please increase or decrease your clothes appropriately. Please pay attention to the protection of weak friends. Dressing index: cold. It's cold. It's suggested to wear winter clothes such as cotton jacket, down jacket, leather jacket and woolen sweater. The elderly and the weak should wear thick cotton padded clothes, winter coats or thick down jackets. Car washing index: appropriate. Suitable for car washing, the next two days without rain, the weather is good, suitable for car scrubbing, blue sky and white clouds, sunny weather will accompany your car clean day after day. The tense atmosphere of the 800 word high school entrance examination has infected every examinee who welcomes it. Everyone is hungry and thirsty to "gnaw" at the books. I'm no exception. Maybe it's the high school entrance examination pressure, I am very upset. In the dead of night, I was still looking through the Chinese books, but I couldn't read them at all. At this time, my mother came in with a cup of hot milk in her hand. 'Nizi, I'm going to take the senior high school entrance examination tomorrow. Don't read tonight. Drink milk and go to bed early! 'mother said with a smile and concern. Although I know my mother's heart, I become a hedgehog because of my irritability, and my mother becomes the object of vent. 'I don't want to drink. I don't even have time to read. Do I have time to drink milk? 'I don't look up. 'for the exam tomorrow, you'd better go to bed earlier, or you'll lose your spirit tomorrow. 'There was a trace of anxiety in my mother's voice. 'don't bother me! I can't read any more books! 'I yelled at my mother. All of a sudden, the atmosphere became very quiet and awkward. My mother was like a turtle without a shell, and I was all over her. I know my mother is concerned about me, I also know that I hurt my mother. In fact, I really don't want to say those sharp, mean words, but I don't know why, with one mouth open, these words shot out like a barrage of bullets. My mother quietly tidied up my books on the bed. Seeing that I didn't feel sleepy, she turned around and sighed and gently opened the door & hellip; & hellip; listening to my mother's footsteps hiding from the door and looking at the hot milk in front of me, my heart was full of guilt. I wanted to run out and say 'sorry' to my mother. However, I have no courage. In this silent night, I hurt my mother, but my mother laughed, so tolerant to me. Broad maternal love, let me feel so great, but let me full of guilt. I turned off the light and heard my mother approaching and leaving. I looked at the ceiling and made up my mind that I would apologize to my mother tomorrow. I suddenly feel that my mother's love is like the air, which makes me live on. I often forget its existence. In the specific environment of the examination room, the touching and collision of the topic of "maternal love" caused the little writer's heart shaking. So the little writer opens his heart, condenses and sublimates the feelings of guilt, repentance and gratitude from the bottom of his heart. So simple, so touching. "Motherly love like the air", what an appropriate metaphor. The mother's love, which is everywhere and all the time in my life, 'let me live on'. In the face of maternal love, 'but often forget its existence', and even 'hurt' it. And the maternal love in 'hand holding a cup of hot milk' 'smile and concern to say' 'tone with a trace of anxiety' 'quietly clean up' 'gently bring the door' 'approach and leave' & hellip; & hellip; in the playback of these scenes, the more tolerant and broad-minded. It is precisely because of these detailed descriptions and plain words that people are moved. And those from the bottom of my heart: "I know my mother is concerned about me, I also know that I hurt my mother. In fact, I really don't want to say those sharp and mean words, but I don't know why, these words are shot out like a barrage of bullets "& hellip; & hellip; true and natural, and resonate with my peers. (Feng Lijuan) maternal love like air 800 words maternal love like air date of publication: May 21, 2003 source: 2002 Ningbo high school entrance examination composition Author: a candidate in Ningbo City has visited 662 high school entrance examinations. The tense atmosphere infected every candidate who welcomed it, and everyone was hungry to "gnaw" books. I'm no exception. Maybe it's the high school entrance examination pressure, I am very upset. In the dead of night, I was still looking through the Chinese books, but I couldn't read them at all. At this time, my mother came in with a cup of hot milk in her hand. "Nizi, tomorrow is the high school entrance examination. Don't read tonight. Drink milk and go to bed early!" Mother said with a smile and concern. Although I know my mother's heart, I become a hedgehog because of my irritability, and my mother becomes the object of vent. "I don't want to drink. I don't even have time to read. Do I have time to drink milk?" I don't look up. "For the exam tomorrow, you'd better go to bed earlier, or you'll lose your spirit tomorrow." There was a trace of anxiety in my mother's voice. "Don't bother me! I can't read any more books! " I yelled at my mother. All of a sudden, the atmosphere became very quiet and awkward. My mother was like a turtle without a shell, and I was all over her. I know my mother is concerned about me, I also know that I hurt my mother. In fact, I really don't want to say those sharp, mean words, but I don't know why, with one mouth open, these words shot out like a barrage of bullets. My mother quietly picked up my books on the bed. Seeing that I didn't feel sleepy, she turned around and sighed and gently opened the door Listening to my mother's footsteps and looking at the steaming milk in front of me, my heart is full of guilt. How I want to run out and say "sorry" to my mother. However, I have no courage. In this