High school biology: what is the composition of lipids? What are the components? urgent

High school biology: what is the composition of lipids? What are the components? There are many kinds of acute lipids, which can be basically divided into three categories: fat, lipid and sterol.

The constituent elements are mainly C, H, O, and may also contain N, P, etc.

The constituent elements of fat are only c, h and o.

The propulsion rate between unit of volume is 1000, and the propulsion rate between area units is 100+0.

2. Right

3. Right

4. Wrong

It is urgent to learn and practice the standard test paper of Chinese unit in grade seven (below) in an all-round way. Look at this: Baidu. /=: ssdao。 /s . htm # % u 5 168% u80fd % u5b 66% u7ec 3% 20% u4e 03% u5e 74% u7EA 7% uff 08%。

What is the novel theme of the composition with expectation as the topic? Is there any urgency in writing? Looking forward to the dream blooming.

"In the corner of the campus, the newly opened cherry blossoms slowly fall with the most natural radian, showing a fairy tale desolation, and the tall and straight French phoenix tree casts a little vicissitudes ..." I wrote my own novel with my pen. You should have guessed that my dream is to be a writer and make contributions to the world.

I am actually a sentimental girl. Although I seem to be indifferent and full of justice on the surface, I always close my eyes and often post some slow pictures: in the autumn forest, maple leaves are red, the grass turns dark yellow, woven into a golden carpet, and tall pine trees are like guardians of the forest. Sometimes, unknown animals will jump out, turn around and leave with food ... usually this photo makes me full of poetry and imagination. Sometimes I want to write it down, but it seems too lazy. At this time, my dream of being a writer has sprouted.

God always gives people with dreams a chance. When the second volume of grade four was published, our class set off a writing storm. It is an exaggeration to say that few people go out after class. Even the boys who are usually alive and kicking are like monkeys. They don't play Resident Evil and rob people, but sit quietly in their seats and write their own stories. Not to mention girls, form their own small groups to discuss and share. This kind of recess is what I miss most.

This is, the little teeth of my writer's dream are also a little long. Another problem is that my patience is not good. After writing the first chapter, you can't write the second chapter. According to my mother, it's always at the beginning. Yes, it is impossible to dream without practical action. And doing everything requires perseverance, perseverance and careful observation of everything in life.

Since I wrote the above words, there is no more. It took a long time. That's because I can't write anymore. My mother said that I didn't write carefully from many angles. She swore, "If you can't finish an article, what writer do you need?" Will the author die on the number of words in the article? "Maybe this is one of the magic weapons used by parents. But I still think they ruined my dream. But I still have my best ally, that is, my classmates, who let me stand up again when I am in trouble! Said to me, "Come on, Zhang Mengyun! "Although it was only a few short words, it flowed into my heart like a warm current.

What is a dream? It's a bridge, a rainbow bridge in full bloom. After standing firm, go up again to meet success!

Turn off the computer as soon as it is turned on, then turn it on and then turn it off. The previous motherboard has been urgently repaired. If it is a desktop computer, see if the battery on the motherboard needs to be replaced. 2 Check the capacitor for Explosicum 3 Reinstall the system 4 and replace the silica gel under the cpu fan.

Childhood classic sentences+appreciation, I want sentence by sentence, not long paragraphs. I am in a hurry to get the Complete Works of Childhood Words and Gorky's Childhood Words and Expressions.

1. Life is like a necklace full of jewels, and childhood is the most dazzling gem; Memory is yang, and childhood is the most touching wave; Life is like a big tree, and childhood is the most beautiful green leaf; Time is like a garden, and childhood is the most gorgeous flower. The boiled water you must drink is sweet and bitter.

2. Childhood is always happy, childhood is always forgotten and childhood is always short.

3. Childhood dreams, colorful dreams; Childhood songs, happy songs; A string of childhood footprints; One childhood story after another. ...

4. Childhood is an ocean of joy. On the seashore of memories, there are countless shells, some of which are gloomy, evoking a sad past; There are many wonderful and interesting stories that remind people of their childhood. I am looking for the most beautiful shells on the coast of memory. ...

5. Childhood is colorful, just like beautiful seashells by the sea; Childhood is carefree, just like a wave doll playing all day; Childhood is pure and sweet, just like a clear spring in a mountain stream.

6. Childhood is like a wave in the river, calm as a mirror, slightly rippling and choppy;

7. Childhood is like a stream of life, a childhood of the sea, a childhood of flowers and fruits, a childhood of the past and the future.

8. Childhood is the cornerstone, laying the foundation for the future of life; Childhood is happiness, it sings the music of life; Childhood is the coordinate, which records the starting point of life.

9. Childhood is the wind, blowing through the clouds; Childhood is a cloud, turning into the rain of the new year; Childhood is rain, nourishing new flowers; Childhood is a flower, watch the sunset glow with me at dusk.

10. Childhood is fearless, unscrupulous and ignorant. Excerpts from good words: gloom, trembling, fear, frequent chanting, still timidity, whistling, depression, showing off, gentle and clear trembling, refutation, kitchen god's silence enveloped the sudden and sudden, full of interest and sparkle. 1 A few days after my mother was buried, my grandfather said to me, "Hey, Lacey, you are not a medal. You can't always hang it around my neck. This is not your place. You go to the world to make a living ... "So, I went to the world. In the gloomy autumn, I can't see the sun, feel the warmth of the sun, and even forget the existence of the sun-in this autumn, I lost my way in the forest more than once. When you are far away from the road and exhausted and can't find your way, you have to walk on the muddy road, through the thorns and on the uneven mound. In this way, you can always walk on the wide road in the end! So, I made a decision. This autumn, I plan to go to Kazan, hoping to go to college there. On the blue surface of the Volga River, orange-red ships are going upstream, while golden leaves are slowly drifting downstream. Music is full of sadness, like a river flowing down the mountain, stirring in the room. In singing, my grandmother sometimes moves forward, sometimes retreats, sometimes flies, and her youth instantly returns to her, making her present a flower-like beauty. Everyone was attracted to her. 6 Zoka blushed and walked into the middle of the kitchen, jumping up like a flame: his hands were high, his steps were too fast to be distinguished, and his shirt trembled and shone like a fire. He danced wildly, as if he could jump all over the city just by opening the door and letting him out! In the long empty and boring years, fighting is a holiday, but fire can be a pleasure; Scars can also add luster to a dull, expressionless face. 7 "Wake up, everyone will die. What is this? Isn't this bird going to die? " The shadow of the lamp is no longer swaying, and the moonlight is clearly printed on the floor, looking so sad and calm. 9 Wide and straight roads God has given you spacious property with axes and shovels. Why do you only have hooves and dust? 10 The sun shines obliquely on the table, and two long-necked bottles containing Gowasu wine and vodka are shining with dark green light. 1 1 It's dazzling outside. My bird is playing in the cage, and the yellowbird, the grey bird and the goldfinch are singing. 12 The autumn rain is continuous, the autumn wind is whistling, the branches are swaying, the outside is wet and cold, but the inside is warm as spring, and everyone sits next to each other and the atmosphere is harmonious. Everyone was infected by him and trembled with him. 13 since then, I have observed people with uneasy feelings, as if the skin on my heart had been torn off, so this heart has become unbearable sensitive to all humiliation and pain, whether it is my own or others'. 14 Everyone has his own name and everyone has the same rights. 15 officials are like naughty children, who violate all the laws as soon as they come up. 16 in the endless work calendar, sadness is also a procedure, making a fire is a pleasure, and even the scars on the face are dotted with nothing ... 17 resentment is a piece of ice, which will melt when it gets warm. 18 Her series of "afters" seems to me to be a ladder. It leaves her and extends deeply downward to a dark place and a lonely place. 19 don't worry about adults! Adults don't study well; God is testing them. You haven't been tested yet. You should live according to your children's ideas. Wait for God to open your heart, tell you what to do and show you the way to go. You got it? As for who made what mistake-it's none of your business. It is up to God to judge and punish. He's in charge, not us! 1. On the blue surface of the Volga River, an orange-red ship is going upstream, while the golden blades are slowly drifting downstream. I'm afraid of my grandfather. I always feel that his green eyes are staring at me. 2 1. Music is full of sadness, like a river running down the mountain, stirring in the room. 22. People often hear their songs and stop to watch them under the window. The upturned face reminds me of dirty dishes that have not been washed.

Hello, I hope my answer is helpful to you and I hope you will adopt it.

I don't know how to make a hamster observatory. I hope I can give an answer. I need to buy one urgently, but it's not too expensive and not strong. Some hamsters may bite, but they can't use it. Taobao sells it. Buy an observatory where you can grind your teeth. If your hamster can't play, pay it. Be patient.

Seek adoption

What are the popular majors or majors that are easy to find a job? If you can't learn technology in a hurry, you must start from scratch. Learning a technology, starting with technicians and engineers, is better for your future. Major: architecture, electrical engineering and mechanical engineering.

Who can tell me the importance of water (the fewer words, the better)? Rain and dew moisten seedlings, and nothing can grow without water. Water is the basic unit of life and the basic condition for the occurrence, development and reproduction of life.

Modern medical measurement shows that the proportion of water in the main parts of human body is: brain 74.5%, bone 22%, kidney 82.7%, bile 97%, muscle 75.6% and blood vessel 83%. Water accounts for 70% of the total weight of human body. A person needs to drink more than 2 liters of fresh water every day, and 1~2 kg of water can be extracted from the air that a person breathes every day. People will die as long as they lose water to 1/4 of their body weight. As the saying goes, "People can go without food for three days, but they can't go without water for one day." This sentence vividly reveals the dependence of human survival on fresh water.

Water is indispensable not only to all living things in the world, but also to industrial and agricultural production. From the planting point of view, the water consumption per hectare in the growing period of crops is 23-34 tons of wheat, 22-27 tons of cotton and 365,438+0-40 tons of sugar beet; From the perspective of animal husbandry, it takes 3 1 .5 tons of water to produce1kg of beef; From an industrial point of view, it takes 20-40 tons of water to produce 1 ton steel, 200-400 tons of paper and 1 ton man-made fiber, while the water demand to produce 1 ton synthetic rubber is as high as 2.77. Space, fresh water and food are the three pillars supporting human survival.

The earth observed by astronauts from the spaceship is a blue "water ball", and water accounts for/10 of the total surface area of the earth. The total reserves of oceans, rivers, lakes, groundwater, swamp water, glaciers, permanent snow, frozen soil bottom ice, biological water and atmospheric water are about 654.38+03.86 billion m3. If these waters are evenly distributed on the earth's surface, the average water depth can exceed 2700 meters. In this way, the water in nature is too rich.

The experimental class is a willow tree in Qinghai Plateau, and the sentence training camp is a willow tree that worries about Qinghai Plateau within 20 minutes.

This is a magical willow tree, which has the courage to resist fate; This is a magical willow tree, which can thrive in harsh environment; This is a magical willow tree, which has unimaginable perseverance and tenacity. Its persistence and tenacity have created a magnificent scenery. It is a willow on the Qinghai Plateau, a magical willow. This willow tree has withstood the wind and rain. It is full of vitality and graceful, so people have to admire its strong perseverance and tenacious spirit.

That's it-this tenacious willow reminds me of him-Stephen Hawking. Hawking suffered from Luger's disease at the best time of young people's activities and development, which made his muscles atrophy and he was unable to move from then on. At that time, he was like a willow tree being eroded by the wind. But he didn't lose confidence in himself. He lived a strong life, studied hard like an ordinary person, forgot the pain and accomplished what he could. He constantly explores science and seeks scientific knowledge. He works long hours every day. Hawking has always been optimistic. He always thinks that fate has not left him with nothing, and he has not fallen into a terrible abyss. He found the birthplace of success by his own efforts and struggled to the door of success by his strong perseverance. Once, in order to show off himself, he said that he never gave up on himself and didn't feel that fate had taken everything from him. He drove a wheelchair in front of the prince and accidentally crushed his toe. Hawking never likes to be disturbed when seeking scientific knowledge, so he often hangs a wooden sign and asks others not to disturb him. What happened in Hawking's life can prove his indomitable spirit and tenacious perseverance. Hawking is a strong man in life.

Whether it's a willow tree in Qinghai Plateau or Stephen Hawking. Can tell us a truth, as long as you have a tenacious spirit and the courage to fight against fate, you are a success.