Knowledge composition is 800 words high, 1.
In order to enrich the theme activities of "My Motherland", a special patriotic knowledge contest was held in grade four. Let's wait and see who will die
I'm an audience.
As the "fourth" player on the field, we shouted "Class four, Class four, be both civil and military, unite and struggle, show yourself." Slogan, cheer for the players on the field.
The knowledge contest kicked off. The first link-forced competition. All the contestants are waiting for the host's password. The contestants in Class One look confident and have a confident smile on their faces. The members of Class Two are a little nervous, frowning and touching their hands involuntarily, and the whole people are nervous. The three players in our class have answers, exchange eyes and encourage each other, and the tension stops abruptly on them. I looked at the "rivals" in each class and the classmates in our class. I thought to myself, "If we stick together, we will definitely get good grades." The required questions were carried out in an orderly and leisurely manner, and the players answered the questions like a flood, and there was warm applause after each score.
I am the button.
The second link-grab the answer. All the contestants are staring at me and waiting for me. Everything is ready except the east wind-just wait for the host to give the order. I also looked at it carefully. Some players have a layer of sweat on their foreheads, some close their eyes and ears nervously, and some keep sitting and taking deep breaths.
Passing 18-wheeler, just after the host finished reading the topic, a player from Class 3 slapped me hard with lightning speed. I suddenly feel that the Tathagata Buddha's Tathagata palm reappears in the rivers and lakes, which makes me feel very painful. As if he had won the championship, the player excitedly stood up quickly from his seat and was about to answer the question. The host hurriedly waved and sat down. It turned out that before the host said "start", the player fouled and the audience was filled with regrets. "Careless lost Jingzhou", the player kept shaking his head and sighing, regretting.
I am a member of the team.
The last link-risk problem. Unforeseen things happened. Because of the first two links, teammates made a small mistake. We are 20 minutes behind other classes. Whether you can win the championship depends on this link. The audience held their breath and stared at us as if holding a magnifying glass. The tense atmosphere seems to solidify the air.
Lingling in the sky, Lingling on the ground, radish and cabbage are all showing their spirits. Unfortunately, the first two topics are too difficult for me. Like a pot of cold water, they put out the fire of victory in my heart bit by bit, thinking, "I hate reading less when I use it, so I must read more in the future." The teammate next to me patted my arm, and I could feel him cheering for me. I looked at the stage and a classmate in my class gave me an encouraging look. I constantly comforted myself and wiped the sweat from my palms: "Persistence is victory, and I will never let them down." After the host finished reading the question, I decisively pressed the answer key. My brain is running at high speed like the CPU of a computer, trying to remember, and finally I got the answer before the answer time. "This precious 30 points has finally been earned!" I felt a sort of surge of relief.
Although we only won the third place, we gained a lot. Besides knowledge, we also have the spirit of unity, cooperation and never giving up.
Senior one 2 knowledge composition 800 words.
Science can tell us a lot of knowledge. If you want to understand the mystery, you need to do the experiment yourself. You can also ask Baidu for help.
This Sunday, I finished my homework early and watched a movie about spies with my father. The sudden appearance aroused my curiosity. In the movie, a spy holds a cotton swab in his hand, then squeezes out a plate of lemon juice with lemon, then dips the cotton swab in the lemon juice and writes on the paper. I guess the words on the paper must be information. However, when the paper dries, the words disappear with it. Then there is the actor who receives the information. He took the information and slowly burned it on the paper with a lighter. Soon, the words on the paper were displayed again. I pointed to the scene on TV and inexplicably asked my father, "Dad, what's the matter? Why did the word disappear? "
Dad shook his head and said, "I don't know that either."
"However, you can do an experiment exactly like him yourself, and maybe you will know the secret."
"Well, it doesn't matter." I listened to my father's words and began to prepare materials.
After a while, the materials were ready: a bowl of lemon juice, a cotton swab, a clean white paper and a lighter.
I learned from the spy on TV. I wrote a lot of words on the paper with a cotton swab dipped in lemon juice and put it on the table to dry. After about a minute or two, the conversation dried up. I took out my lighter and lit it under the paper. After a while, the words that disappeared on the paper can really be seen again. I shouted, "OMG, that's amazing!" " "
But why is this? I was puzzled and finally decided to ask "Baidu".
This is what Baidu told me: the starch contained in the paper will react with iodine to form iodine starch molecules, which are dark blue and purple; Lemon juice is rich in vitamin C, which will be colorless when it reacts with iodine. So the part where you write or draw with lemon juice will not change color.
Because lemon juice contains an ingredient called cellophane, writing on paper can reduce the ignition point of paper. As long as it is baked with fire, the writing part of lemon juice will be burnt first and yellow words will appear.
This reminds me of another movie: a little spy sells eggs in the street every day, and the people who buy eggs are always those. I found that there was information in the egg, because the spy wrote on the eggshell with a pen dipped in vinegar, but when the egg was cooked, the words would be on the surface of the protein, so the information would not be found.
Through these two examples, I fell in love with science even more, and I like science even more. It also made me understand that I can find a lot of scientific knowledge in nature and life.
Senior one 3 knowledge composition 800 words
"I think it's an armchair strategist. I don't know if it should be done." True knowledge lies not in books, let alone in making up lessons, but in life.
"Look! My new invention! " A science lover in the class began to speak. He is the only person in our class who likes to practice. Every time he has free time at noon, his desk is always in a mess, not homework, but his "invention". This time it is an ordinary parachute. He began to explain: "This is a hand-made parachute with its own water spraying function, which can be described as an' air fountain'!" As soon as the voice fell, there was a ragged voice in the class. Someone said, "Can you get extra points for doing these stupid things all day?" I might as well recite a few more words-my mother taught me this! "Some people also said," Hum, who can't do these childish things? " Others said, "Interesting! In all the conversations, he was very happy to help this new "invention" and then said, "Is anyone coming?" I want to test (parachute)! "A few people followed, and I was among them. It turns out that the parachute is composed of a big plastic bag, a thin thread and a modified beverage bottle. I saw him put his parachute in the air. As soon as he let go, the parachute fell from the fifth floor and sprayed water around. It's simple, but it's interesting. He said: "This uses the knowledge of fluid pressure, which is very interesting! "After listening to this, you will think that he is an excellent student in physics. Actually, he's not. His grades in the class are average, not bad but not excellent, but he still likes to do experiments by hand.
I still remember that physics class. Because the teacher revealed the experiment to be done, he brought simple equipment in this class. The teacher will do a cup-covering experiment, which requires a bottle filled with water and a piece of cardboard. In class, the teacher does it on the platform and he follows it at the bottom. As a result, I don't know whether it is improper operation or lack of technology. The experiment failed! It doesn't matter, but the whole bottle of water spilled all over the table, wetting the exercise book and the ground. He just smiled and scratched his head. After class, he cleaned the ground and dried his exercise books.
At first, I was puzzled that he took time out to do this in such a busy study. Later, I gradually understood that he firmly believed in practice and hoped to find pleasure in learning.
Yes, we often judge a person's learning by his grades, but we don't know that learning is not just grades, but also observation and practice. In the eyes of teachers, there are three kinds of people: gifted students, average students and poor students. Teachers always praise talented students and criticize poor students, and always judge a person by his grades. It's not that grades are unimportant, but that grades are really too small compared with knowledge. The teacher should not only teach us the content of the exam, but also teach us to explore. The process of inquiry is the process of understanding the beauty of knowledge, and the process of practice is the process of feeling the beauty of knowledge. But in the eyes of most parents, they don't want their children to have these skills, but they always want to mention something, something and something. Parents and teachers should pay more attention to let their children learn real knowledge.
True knowledge, hidden in practice, is a part of life and the growth of life.
High school 14 knowledge composition 800 words
A young architect asked his teacher, "How can we make tall buildings taller and more magnificent?" His teacher bowed his head and said nothing, pointing to the land. Architects don't understand. Under his repeated entreaties, the teacher said two words: "Come down." In fact, the teacher wanted to tell him that only by laying a solid foundation can the building be higher and more magnificent. But young people still don't understand what this means. Until one day, when he went to the park, he encountered a strong wind, and many low trees were cut off or uprooted. Only those towering trees are intact. At this time, some people are digging holes to plant trees, and some people take care of them: "Dig deeper and the roots will be firmly rooted." At this time, young people realized the method that the teacher taught him. Later he became a great architect.
In fact, every one of us, like that young architect, hopes to get better and better grades and get bigger and bigger officials ... For this reason, we keep trying to find ways, but they are often wrong. Take me for example. When I was in primary school, I was able to listen carefully and master the knowledge well, but I relaxed after I went to middle school. I always think that I will always review before the exam in Grade Three, and then I will study hard. I believe I will not do badly in the senior high school entrance exam. Really, when I always review, the teacher above said that I heard the clouds coming and going, and finally it was too late. I had to read until one or two every day. I regret it in my heart, but it doesn't help. Later, I had to bite the bullet and go to war. Finally, I missed out on Changjing Middle School by one point. Later, my parents paid. Before I went to high school, I vowed to study hard and not make any mistakes again. It was ok to start a few classes, but later, because I didn't lay a good foundation in junior high school, I learned math in a fog. Think about it because I didn't lay a good foundation at the beginning, and now I can't do well in the exam. Just like a building, if the foundation is not firmly laid, how can you make it last?
Most students are like me now. Because I didn't lay a good foundation before, I regret it now, but everything is too late to recover. The past has become the past, so we should seize the present, don't repeat past mistakes, and don't hold the idea that it's not good anyway, and it's useless to try again. We should grasp the foundation from now on, and no one can say for sure what will happen in the future.
Without a solid foundation, how can a building be taller and more magnificent? Without the stability of roots, how can a big tree stand the wind and rain? Without a solid foundation, how can knowledge be more and more?
Knowledge composition is 800 words high.
With the growth of people, the temperament of literati is different from that of ordinary people, from ancient computers to modern computers. What's going on here? Not only because of the power of knowledge!
Recently, CCTV 1 broadcasted a program called "Chinese Poetry Conference". This makes me feel deeply. The teacher Dong Qing in it is my favorite teacher. She reveals the gentleness and elegance of women from beginning to end, which makes people move. Although the age is not young, it still makes people shine. She is very good at the words and deeds of the contestants. What excites everyone most is that chen more won the championship. She has gone all the way through difficulties and accumulated a lot of knowledge, which led to this heavy trophy today. I am gratified by her generosity; Her spirit excites me; Her knowledge reserve surprised me. Chen Geng can have such extraordinary achievements today, not only because of his intellectual strength! With the growth of people, the temperament of literati is different from that of ordinary people, from ancient computers to modern computers. What's going on here? Not only because of the power of knowledge!
Not long ago, I watched another program. It's called Classic Ode. One of the contestants made me a China person feel ashamed. She is a friend from America. Her songs are very popular now, but no one thinks she is a foreigner. This "Dream Butterfly: One Million Possibilities" adds many elements of China's poems, creating a graceful and romantic artistic conception. She is Christine, a doctoral student in China Classical Literature at the University of Wisconsin. Even Kang Zhen, a famous doctor of literature, praised her. Isn't this because of the power of knowledge?
Last year, in the first class at school, journalists from all over the country showed their most impressive photos. What impressed me most was the girl with big eyes. The picture shows a little girl in rags, her eyes are wide open, and her eyes reveal a kind of longing for knowledge and attachment to it, which makes people sad. Fortunately, the little girl was admitted to a good university by her own efforts. So what reason do we have not to study hard now? Later, many people went to interview her and asked her, "What do you think is supporting you?" She replied firmly: "The power of knowledge!
We are studying hard now. "If you eat hard, you are a master." We should use the power of knowledge to overcome everything.
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