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200 words in the composition of science and technology development

Today, I would like to introduce the development of computers. Computer, also known as electronic computer, was invented by von Neumann in February 1946.

At the beginning, the computer needed a room to hold it, and several people could operate it together. At that time, the computer was very slow, and it took a long time to calculate a mathematical formula.

However, because of the progress of science and technology, the computer has become a pure screen computer, the speed of operation has become faster, but the size has become smaller, one person can operate and move! The most important thing is that computers have more and more functions.

With the continuous efforts of scientists, the pure screen computer has become a liquid crystal computer. The computer screen is very thin, with little radiation, and the screen is much clearer.

Under the research of scientists, the LCD computer has become a portable computer, which has more functions and can be carried around. It can communicate with people all over the world on the train.

This is the process of computer development! This is the change brought about by the development of science and technology. Talk about the advantages and disadvantages of the development of science and technology.

As soon as the debate started, the right side couldn't wait to launch an 'attack' on the opposition: in ancient society, people could only drink blood and drink a lot of food and drink. Now, how much progress has been made in our basic necessities of life. Without scientific development, can we live such a comfortable life? Originally, a little cold, fever can kill people, but now medicine can come to the point of bringing back the dead. It used to be that & lsquo; people were rare in the past 70 years, but now it's not uncommon to live to be 100 years old. Cars and airplanes, trains and ships were unimaginable in ancient times. A few kilometers of road is an expedition. Now, the earth is like a small village, which can be turned around at any time. '

Not to be outdone, the opposition immediately retorted: "in today's society, cars can be seen everywhere, which not only does great harm to people's body and mind, but also pollutes the atmosphere. To a certain extent, all living things in the world are harmed by this kind of & lsquo; technological products. Human beings are selfish for their own convenience, regardless of the safety of other earth creatures. To say the least, cars do great harm to human beings. CFCs in air conditioners and refrigerators are also damaging our precious atmosphere. The so-called high-tech products make the world dirty and rigid. The land of freedom is swallowed up by human beings; the sky of freedom is narrowed by human beings; the sea of freedom is also occupied by human beings. '

It's a bit tough to get off the horse! Let Zheng Fang be speechless for a moment. At this critical juncture, a voice came out: "scientific development has brought people into the era of reason. People are no longer blindly superstitious, but are pursuing the truth. Without scientific development, we still think that the sky is round and the place is round; without scientific development, we still think that heaven is heaven and the earth is hell. Science makes us know more about where we are. 'as soon as the language has fallen, everyone's eyes are shooting towards his position. Zheng Fang's classmates cheered warmly, while the opposite side cried out: "traitor! traitor! "I didn't expect there would be traitors in the 21st century. I've never heard of it, I've never seen it before."!

In order not to be defeated, the opposition side quickly retorted that it wanted to suppress the party's arrogance: "20. In fact, the whole international community has made unremitting efforts to ban biological weapons and has made some progress. However, in the 21st century, the potential danger of biological weapons has been greatly increased. Some countries and regions may continue to develop and develop biological weapons. In addition, the rapid development of biotechnology has greatly increased the potential threat of biological weapons. The bioterrorism marked by the & lsquo; anthrax incident in the United States has posed a real threat to international security. '

It's time to conclude.

In the future, the earth will be destroyed in people's hands, destroying all things on the earth and human beings themselves. In the future, human beings can live to be over 200 years old. We can travel freely in the solar system and even the Milky way. In the future, do we have a future? In the future, our future will be better? Each country has its own myth, how beautiful it is; each country has its own famous works, handed down to this day; each country has its own classic paintings, how precious. Scientific development turns everything into history. Fate no longer has a beautiful myth, because of the reality; will never have a good name, because there is no romance. There will never be a famous painting, because the city is no longer a landscape. In ancient times, when people looked at the moon, they would think of Chang'e, jade rabbit and distant relatives and friends. Now, facing the same bright moon, people think of a planet full of small holes and whether people can live on it. With the continuous development and progress of society, science and technology continue to fly, innovation has both advantages and disadvantages for human beings. Science is always a double-edged sword, which provides convenience to human beings, and also makes human beings pay the most precious things. Facts have proved that the emergence of such modern tools not only proves that exchanges between different regions of the world can not be separated from it. It seems to be a driving force to accelerate social development. It has woven a global network with chains, which has captured development and life. Today, the pros and cons are equally matched & hellip; & hellip;

With the bell, the debate ended in a draw!

The disadvantages of the development of science and technology in Huansha primary school in Zhuji City, Zhejiang Province are greater than the advantages. Although science and technology will bring convenience to people, it will also have an impact on people and bring great disasters to human beings and the natural environment. Science and technology will be the earth mother with many scars! So I think the disadvantages of science and technology development outweigh the advantages.

Several years ago, the earth's forest resources were so rich that almost all the earth except the ocean was trees. It's a fairyland on earth! But now, because of a variety of life needs, such as: to make disposable chopsticks, furniture, paper sheets and so on. It made people cut down everywhere. As a result, forest resources have been greatly reduced. Since the 1980s, the world's forest area has been reduced by 110000 square kilometers every year. Desertification has affected 20% of the world's land, and the atmospheric carbon dioxide concentration has doubled in 100 years. Due to the low forest coverage, a large number of wild animals have lost their living environment. There are more than 4000 endangered species in China! If this continues, the consequences will be disastrous.

The sewage discharged from various factories pollutes the source of water, threatening the lives of animals and human beings. China has 2730 cubic meters of water resources per capita per year, 12000 cubic meters in Canada and 10000 cubic meters in the United States. We have less water resources than other countries. Shouldn't we value water resources more than other countries? At present, there are 1. 700 million people drink polluted water because 36 billion cubic meters of sewage are discharged into rivers, lakes and seas every year, four fifths of which are untreated. This is the consequence of the development of science and technology!

……

The decrease of forest resources and the pollution of water resources are all the costs that people pay for the development of science and technology. If this continues, the earth will be destroyed, and so will mankind. Now, we should plant more trees to keep the forest resources. Sewage should also be treated separately. So I think the disadvantages of science and technology development outweigh the advantages.

Changes brought about by the development of science and technology in yujialu primary school in Xinpu town. Computer, also known as electronic computer, was invented by von Neumann in February 1946.

At the beginning, the computer needed a room to hold it, and several people could operate it together. At that time, the computer was very slow, and it took a long time to calculate a mathematical formula.

However, because of the progress of science and technology, the computer has become a pure screen computer, the speed of operation has become faster, but the size has become smaller, one person can operate and move! The most important thing is that computers have more and more functions.

With the continuous efforts of scientists, the pure screen computer has become a liquid crystal computer. The computer screen is very thin, with little radiation, and the screen is much clearer.

Under the research of scientists, the LCD computer has become a portable computer, which has more functions and can be carried around. It can communicate with people all over the world on the train.

This is the process of computer development! This is the change brought about by the development of science and technology!

Qingshuihaosi changes brought about by the development of science and technology composition 300 words today, the teacher assigned a composition. The requirement is: read the text to your father or mother, ask them to talk about the changes brought about by the development of science and technology, and then write down their words. In the evening, when Dad came back, I couldn't wait to ask, 'dad, can you tell me what changes technology has brought us? My father said: 'modern science and technology have been developed and water heaters and electric lamps have been invented, which have added convenience to our lives. "I asked," Dad, how did you live at that time? "My father replied," at that time, we could only use coal to boil water and light lamps with matches. It was not as comfortable as now, water heaters and electric lights. "I broke the casserole and asked," Dad, how did you harvest and eat at that time? My father said: 'the tool used to be a sickle, but now the harvester is on. The farmer sits on the harvester with a smile on his face, like a blooming flower. These high technologies have brought farmers the joy of harvest and infinite hope, and the development of these technologies has brought one surprise after another to our life. '

Ah! Today, with the development of science and technology, our life is getting better and better. I believe that through our continuous efforts, our life will be icing on the cake!

I think the disadvantages of scientific and technological development are greater than the advantages.

In the process of science and technology development, garbage is bound to be produced, which brings white pollution. It can not be decomposed and brings environmental pollution to the city. If the garbage is buried in the soil and the waste plastic products are continuously accumulated in the soil, it will affect the absorption of nutrients and water by crops, resulting in crop yield reduction.. Last year, there were 20 herdsmen by the Qinghai Lake, with nearly 1000 sheep. They died of swallowing waste plastic products as food, resulting in an economic loss of more than 300000 yuan.

Not only in the environment and agriculture, science and technology has brought harm to people, but also brought more casualties in other events. In the Second World War, in order to force Japan to surrender quickly, at 8:15 on August 6, 1945, the United States dropped a uranium bomb code named "little boy" in Hiroshima, causing 200000 deaths and injuries among 245000 people in Hiroshima City, and the whole city was reduced to ruins. How terrible!

Therefore, I think the disadvantages outweigh the advantages in the development of science and technology. Experience science and technology; look forward to the future

Today, my teachers, classmates and I took a bus to Zhejiang science and Technology Museum in Hangzhou. Walking into the hall of the science and Technology Museum, I was stunned. On our right, there was a large infiltration cinema similar to a ball. The surface of the theater was uneven, like a planet. It was so cool! There was no time to enjoy it, so we hurried in