The first day of writing science and technology, 750 words.

The first day of writing science and technology, 750 words.

In daily life or work and study, everyone will inevitably contact or use composition. The composition must focus on the theme and elaborate on the same theme. No rambling, lax theme or even no theme. I believe that writing is a headache for many people. The following is a 750-word composition about science and technology in Grade One. Welcome to reading. I hope you will like it.

When it comes to technology, I think most people will think of Shenzhou-8, Tiangong-1, suspended trains … and these things are so far away from us. But in fact, as long as you look closely, you will find that technology is around me, whether it is an air conditioner that expels hot air for us, an electromagnetic cooker that brings us delicious food, a washing machine that washes clothes for us, or a refrigerator that keeps food fresh for us ... all these show that 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.

The first day of writing science and technology, 750 words 2 "I'm dying of thirst!" I am dying of thirst. "As soon as I entered the room, I shouted. 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 little experiment, 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!

The first day of junior high school wrote a composition with 750 words and 3 words on the topic of science and technology, and walked into our campus with cheerful steps. Today's campus is very lively, and wonderful activities such as science and technology exhibition boards, "egg protectors" and paper airplanes have formed a poetic and wonderful "Science and Technology Festival"!

On the overpass, many students are holding colorful things in their hands, ready to throw them down. You may think, what are they doing? Needless to say, of course, we are preparing for the "egg protector" competition! There are several players on the stage in our class! I saw Dai Kaicheng smiling and not nervous at all. Luan Xian, on the other hand, looked nervous for fear that her eggs would be broken. Jingjing, without any expression on her face, seems to be thinking about something. "Get ready-"shouted the referee. Three students get ready at once. "Du-"the whistle sounded. Three students gave up and left. A few seconds later, three egg protectors landed. The assistants came to the prosecutor with three egg protectors. The prosecutor picked up Dai Kaicheng's protective cover, divided by three times and five times, and removed the "outer cover". As a result, alas, the egg liquid flowed out. Dai Kaicheng-failure! Then Jingjing's patron saint. I opened the first floor and demolished it. As a result, I tore down four or five floors and still didn't see the eggs. This can make us laugh. I asked Jingjing, "Please, I said you are not tired?" Jingjing smiled shyly. I finally saw the eggs. I thought 100% succeeded, but unexpectedly, the egg was broken! With so many layers, why is it still broken? ! Finally, it's time to dismantle the exquisiteness. We gave Yunxian 100% hope of success, but we still failed. I don't understand: "wasn't it fine in the experiment a few days ago?" How about now ... "I'll ask Luan Xian. Luan Xian said, "Eggs must be broken! "This-what bad luck! We put our last hopes on Winman and Gao Xiang. After a few minutes, it's time to check. With a nervous mood, watching the prosecutor open the protector-ah! Eggs are delicious! Look at Lin's-broken! Our class 4 is 1. All right, Winman, you're great!

In addition to "egg protection", scientific knowledge contest, paper plane and science and technology exhibition board are also wonderful! Especially in the scientific knowledge contest, our class won the first prize!

This "Science and Technology Festival" brings us a long-lost smile! "Science and Technology Festival"-Let me fly!

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!