In the era of black and white film, there were few photos, so I cherish them all. Maybe in your life, there are only three photos of childhood, graduation and marriage. Now, we have entered the digital age, and there are more photos, so you don't have to think about it, and the memory of life will fade.
This can't help but make me think: what has the power of science and technology brought us?
There is no denying the convenience brought by technology. When traveling, we can take out our camera and shoot beautiful scenery at will; At the party, we can send short messages in groups and meet many old friends. When we are not at home, we can make video calls to reassure our parents who are far away from home. Technology has brought us too much convenience, so we attach ourselves to it and enjoy the benefits brought by technology.
When I read "I can finally send my messenger geese back to Luoyang", I felt how lucky we were that we didn't have to be like the ancients for four years and couldn't express it to our families. Is that really the case? Otherwise, we are unfortunate. Because of the existence of science and technology, we can't feel the homesickness of wandering at night. We can't feel Liu Yong's sadness of "holding your hand, growing old with your son, and being speechless". In our eyes, people who leave can still keep in touch, and what they lose is the humanistic feelings of the ancients, which we can't understand in this technological age.
Therefore, we deeply realize that technology is a double-edged sword, which brings us convenience and reduces humanistic feelings.
Should we give up science and technology and feel the lost humanistic feelings? No, we won in the trend of scientific and technological development and recovered our lost humanistic feelings. Science and technology are developing, human beings are making progress, and those who go downhill will eventually perish. In fact, we have long been aware of the disadvantages of science and technology and have taken many measures to remedy them. Bi Ru said that a well-known coffee shop has publicly stated that our store does not provide wireless Internet access; There is even a bar designed with wine glasses. Only by sitting next to the glass far away from the mobile phone can the glass be filled. The purpose of these small measures is to let people put down their digital products, really put their hearts into interpersonal communication, find back their lost humanistic feelings, and stop being "machine slaves".
Technology has brought us convenience, but we can't let technology take away our humanistic feelings. Please put down your mobile phone and computer, participate in social activities, or write a letter to your parents in your hometown. Don't let "I am worried about the bright moon, and I will follow the wind until Yelangxi" become a swan song!
Science and technology composition 2 "I'm dying of thirst! I'm dying of thirst. " I shouted as soon as I entered the room. Pick up the glass and drink it off without saying anything. At this time, my corner was attracted by my deskmate's sister. She is carefully drawing a circle on a piece of white paper, which is as big as the mouth of the cup I am drinking. It suddenly occurred to me: will the paper be upside down on the cup without falling off? With this question, I'm going to give this experiment a try. At the beginning, I prepared a cup with only half a glass of water and two blank sheets of paper.
The first step of the experiment: I held a cup in one hand and a blank sheet of paper in the other, and various possible results came to my mind. After careful consideration, I gently pressed the paper on the cup, covered it with one hand and quickly turned the cup upside down. Wow! It worked! However, in a few seconds, the paper broke away from its mother's arms like a child and was washed away by the water. What's going on here? I thought and thought. I think it may be because the water is not full. What will happen if I fill it up?
Experiment 2: So, I filled up the water.
The third step of the experiment: as before, I slammed the paper on the cup and quickly turned the cup upside down. Wow! It worked again! This time, I calmed down and counted silently: 1, 2, 3, 4, 5. ...
Ah! The paper was washed away helplessly again. But compared with just now, time is far ahead. I smiled with satisfaction.
But what makes paper keep moisture? I was puzzled and had to turn to the "heart of wisdom"-computer. It turns out that there is very little dissolved air in the water. The pressure of the air in the water on the cardboard is far less than the atmospheric pressure outside the cup, and the quality of the water itself is so small that the atmospheric pressure holds the water tightly like a powerful giant palm. It looks as if it is supported by cardboard. But this only happens when the cup is full of water. If the cup is not filled with water and there is enough gas in the cup to offset the atmospheric pressure outside the cup, it will not be dragged up. Even if you hold it, it will fall quickly. I see. I finally understand.
Through this small experiment of holding water on paper, I found that there are mysteries of life everywhere in our lives. If I can take my eyes to find out, I will definitely find more beautiful phenomena in my life. We don't lack beauty, we lack discovery. As long as we can observe carefully and feel attentively, I believe we can pay more attention to more extraordinary beauty!
Composition 3 on the topic of science and technology mentioned "science and technology". Perhaps the first thing you think of is the cutting-edge technologies such as rocket ascending into the sky, submarine entering the water, suspended train, Shenzhou-8 and Tiangong-1. In fact, technology is not far away from us: when the hot summer comes, we can enjoy the cool in a comfortable air-conditioned room; When we are hungry, my mother cooks a delicious meal for us with an induction cooker, a rice cooker and a microwave oven. When we are too busy studying or working to take care of a lot of clothes to change, the washing machine solves the problem for us … Look, technology is around us.
Going home from school on Friday, sitting in front of the TV, listening to pop songs and watching Chinese and foreign news anecdotes broadened my horizons, enriched my knowledge and made me happy. It's really "knowing what's going on in the world without leaving home."
When visiting relatives and friends, electric cars, motorcycles and even more and more popular cars have shown infinite charm. It won't be long before we can get together with our relatives and friends under the breeze.
When we go out to travel, or get on the train and fly in the mountains, we can see the beauty of nature at a glance; Or fly in the vast sky, accompanied by blue sky and white clouds; Even sitting on the maglev train, you can feel the comfort of lightning speed. Technology is really amazing and brings people a lot of convenience.
The emergence of telephones and mobile phones has made us bid farewell to the era of flying pigeons delivering books and enhanced the communication between people. The popularization and use of computers not only brings people a way to get rich, solves many problems in people's lives, but also eliminates the pain of missing distant relatives. This summer vacation, my family bought a computer. Through the video, grandma met her father who worked in Guangzhou. This made grandma very happy, changed her old malaise, and she was very happy all day, and never nagged her father to come back to chat with her again.
Even in our rural schools, computers and multimedia devices are used in classrooms, which greatly improves our interest in learning.
……
Watt invented the steam engine, Edison invented the incandescent lamp, Franklin invented the lightning rod, and Bell invented the telephone ... It is the development of science and technology that leads the continuous progress of human society. Our great ancestors, after numerous experiments, have created many miracles for us. Nowadays, the development of science and technology is in full swing, and great achievements have been made in military, medical, aviation and daily life. Cloning technology and nanotechnology are no longer strangers.
We live in the age of science and technology, and we grow up in the life of science and technology. As the founders of the new century, we should set up lofty aspirations and bravely climb the peak of science and technology. Looking forward to the future, the motherland will be a great landscape, and in the near future, our life will be better by science and technology.
Technology is not only around me, but also in my heart, in my swaying dream.
Composition on scientific and technological topics 4 2 1xx year 65438+ 10/Monday sunny
Today, my first clone was born. You see, I have Liu Xiang's legs, Yao Ming's height and Yi Jianlian's arms. I am so different, no wonder the whole world will cheer for my birth. Look, leaders of all countries are gathered in this small research institute.
21xx it will be fine on Tuesday, May 5th.
I am four years old. Forty-four fathers and sixty-six mothers said to me, "Every successful person should cultivate good habits from an early age. And you, as the first clone, have a different mission. We must strengthen training in all aspects from an early age. " So I have the best nutritionist, bodybuilder, all kinds of teachers and extraordinary coaches at all levels in the world.
2 1xx It will be fine on Wednesday, June 6th.
Interestingly, there are so many fitness facilities and intellectual toy houses at home, and so many people surround me and play with me every day. I'm so happy! I like days like this.
With the help of my uncles and aunts, I began to participate in various competitions. And has made many achievements. To this end, all major media reported my follow-up report.
2 1xx It will rain on Thursday, June 6th.
I don't like this life anymore. Every day, my parents force me to study Chinese, math, English, sports and music ... endless study projects make me very tired. Looking at the light rain outside the car and watching the children playing in the rain, I envy. Envy their freedom and carefree. Others have only one father and one mother. Hey! Having so many parents turned out to be such a painful thing.
2 1xx It rained on Friday, August 8th.
This year marks the 20th anniversary of China hosting the Olympic Games. It's also my 10 birthday. I don't think my heart can bear the pressure of that heavy study task. I feel physically, mentally and spiritually unable to support myself. What should I do? My heart began to bleed.
2 1xx It rained on Sunday, July 7th.
I am twelve years old. Twelve years old should be the age of a flower, but I know my flower is about to wither. I decided to leave this world.
When I jumped down from the upstairs, I felt a kind of relief, a kind of happiness I had never had before. I feel like a bird, breaking away from my mother's arms and flying to the free sky.
Science and technology topic composition 5 teachers and students:
Good morning!
20 years165438+1October 29th, at Fuzhou Science and Technology Museum, I participated in the 24th Fuzhou Youth Science and Technology Innovation Competition. I won the first prize in this competition with the first place in the environmental science group. Here, I would like to thank my mentors-Mr. Wu Ruiping and Mr. Xue Lian, who gave me careful guidance in this innovation competition. I also want to thank other teachers and classmates. I couldn't have succeeded without their support.
Below, I will briefly introduce the process and feelings of participating in this innovation competition.
I am the propaganda cadre of the class, and the blackboard newspaper of the class is always published by me. Whenever I finish writing a blackboard newspaper with chalk, I always feel that my hands touching chalk are very dry. If I don't clean them in time, it won't be long before my hands will peel off, which is very uncomfortable! Why do you feel this way? Upon inquiry, it is known that after people's hands touch chalk, the skin mucosa will be stimulated, making the skin dry and rough, accompanied by itching and even peeling. I am very interested in chalk. Observing chalk has become a compulsory course for me every day: I found that there are often a lot of discarded chalk heads in the classroom chalk trough; I found that the teacher's body and hair were covered with white chalk; I found chalk dust flying in the air during class ... the original discarded chalk head wastes hundreds of millions of raw materials every year; It turns out that the harm of chalk powder to health and environment cannot be estimated; It turns out that my dear teacher is surrounded by chalk powder every day! So, I made up my mind to transform chalk!
I communicated this idea with the instructors, and they were very interested in it, so we started all kinds of attempts: wear gloves to class? No, inconvenient and inflexible; Write with a plastic cover behind the chalk? No, it will still be wasted; Use whiteboard instead of chalk and blackboard? No, realistic conditions don't allow it. We are in trouble, but the brain never stops thinking about transforming chalk. In the process of making a newspaper clipping, I suddenly found that the colloid of the glue stick can expand and contract inside and outside with the rotation of the shell device. People don't need to touch the colloid, they just need to grasp the shell to complete the pasting work. Turn colloid into chalk! I screamed with excitement. So, I made a big dissection of the whole glue stick-I took it apart, and after careful observation, I found that as long as I found the glue stick shell device that matched the size of the chalk, I could fix the chalk like the glue stick. In this way, I transformed the rotary environmental protection chalk and completely solved all kinds of problems that had troubled me.
The creation of rotating environmental protection chalk made me understand that scientific creativity comes from life, and only by observing more, using more brains and working harder can we innovate. Students, pay attention to everything and study! As long as you are a man with a conscience, you can succeed!
Thank you!
With the rapid development of modern science and technology, we have walked out of the previous era of eating blood and drinking blood, and came to the era of advanced science and technology. The development of science and technology has brought great convenience to our life.
I used to worry that there would be no lights at night, but every household is brightly lit tonight; It used to be luxurious to taste the delicious food in the sea, but now fish and shrimp are commonplace; I used to think that letters from home were difficult to pass on, but now and every day is still our neighborhood. Yes, a series of benefits brought by science cannot be ignored!
In the Tang Dynasty, Yang Guifei wanted to eat fresh litchi, but fresh litchi could only be eaten in the south, so the emperor sent someone to transport it from thousands of miles away with a fast horse. How many fast horses have been exhausted to ensure freshness! But nowadays, it is common for ordinary people to eat fresh litchi everywhere in the market. It can be seen that the development of science and technology has brought us much convenience!
In ancient times, because of living and working outside for a long time, wanderers who left their hometown missed their relatives very much. After writing a letter from home, his family didn't reply. Why? Because the letter may have been lost halfway before it was delivered home; It is also possible that it took a long time for the family to receive the letter, and it may take a month or two for the wanderer to receive the reply from the family. So it is difficult to say a word to his distant relatives.
Now, you can send messages to your family far away, which is very fast. In less than a second, the other person can know what you want to say, not only the conversation, but also the video chat. In this way, you can chat with distant relatives at any time and see what they look like. How happy it would be if you ever met your relatives in the distance! Technology can help you solve things that people can't. For example, if you encounter difficulties in learning, as long as you turn on the computer to type, the correct sentence will be displayed on the computer display screen. As long as there is science, there is no need to worry about any major difficulties.
However, with the development of science and technology, environmental problems have been ignored. Discharging wastewater into rivers on a large scale makes people unable to eat safe seafood and wastes valuable resources on a large scale, but never thought about how serious the consequences will be. While developing science and technology, we should also protect the environment.
Science and technology is a double-edged sword, which is the driving force of our human progress. It has brought us convenience and development, but it has also brought many negative effects. We should make full use of the benefits brought by science and technology, and we can't ignore the environment on which we live.