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A thousand years ago, people lived a simple and hard life. At that time. People don't know what the spiritual world is. They just want to be safe, eat and drink, and maintain a normal life. To this end, people burn incense and worship Buddha and pray for peace. Carriage should be the only means of transportation, but it is expensive, so people have to choose to walk. It takes a long time from Shanghai to Beijing. If you have pneumonia, there is no cure, so people's life span is very short.
Now someone has invented the mobile phone, which has eased the lovesickness and melancholy of people in different places; Someone invented the plane and gave up the long journey of people running around outside; Someone invented an anesthetic to prevent people with this disease from suffering another layer of pain. It is technology that makes our earth smaller and smaller. Now we are no longer satisfied with material enjoyment, but more spiritual comfort. Burning incense and worshipping Buddha still exists. What doesn't exist is people's stupid ideas.
The medical technology developed at present can cure almost all common diseases in life, and the extended people have more time to expand and enjoy life. The rapid development of natural science and technology such as biology and chemistry has brought rich and colorful spiritual food to people who were originally curious. While exploring and inventing, human beings affirmed their self-worth, and while enjoying the benefits brought by science and technology, they also gained happiness.
Once, people marveled at the stars all over the sky; Today, we have been able to send satellites into space.
Once, people were thinking about how to gain a foothold in this law of the jungle world; Nowadays, we are thinking about how to survive in this infighting world.
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To transform this society by science and technology, we need to face up to the power of science and technology and make our life better!
Expert comments:
The author's conception is bold, novel and original, especially with proper words, deep level and strong sense of rhythm, narrative in chronological order, highlighting the central idea, expressing feelings and arousing readers' interest in thinking and reading.
Disadvantages of scientific and technological development In the long history of mankind, scientific and technological development is undoubtedly the best tool to promote human development. However, with the development of modern science and technology, the disadvantages of scientific and technological development have been exposed and gradually surpassed the advantages of science and technology. If you don't believe me, please read on.
Los Angeles, what a rich town, but it is in this city that technology is a headache for everyone. The city is surrounded by mountains on three sides, and science and technology are developing rapidly. Almost every family has a car, but the exhaust gas emitted by car exhaust contains a lot of oil, carbon monoxide, dust and countless nitrogen oxides, which makes the prevalence rate in cities always high. Moreover, oil has a corrosive effect, and the number of statues in cities has been significantly reduced for a long time. The culprit is oil! Because there are many electrical appliances in this city, radiation will seriously reduce people's life span and make the death rate in this city extremely high! The most famous is a light pollution incident in 1952 and 65438+February, with nearly a thousand deaths!
Give another example that is closer to us. Beijing, the smog capital, why is the smog so serious? Because Beijing is the heart of the motherland. High population density, rapid development and serious industrial pollution. For a long time, Beijing's air pollution level ranks first in the world!
I still have some data here: because of the destruction of the ozone layer, the living environment of polar bears will move to the jungle within 20 years; Because the development of mankind is getting faster and faster, there are fewer and fewer forests, all of which have been swallowed up, all of which have been ruthlessly swallowed up! Because of the disappearance of forests, thousands of gorillas in the world will be homeless!
In fact, there are many such examples. I just want to say to you, wake up, stubborn people!
Expert comments:
The structure is incomplete, the language is dull, and the center is not prominent.
Regarding the development of science and technology, everyone will have a dream of science and technology. Imagine yourself as a scientist and invent many convenient and quick things, such as: you can take classes with a microcomputer without going to school; You can let the intelligent robot feed you without reaching out; You don't have to go out and sit at home. You can send whatever you want. But have you thought about it? There is such a thing that may make mankind extinct! ! ! Why? Then I'll tell you. . If everyone is like this, who else will walk with their feet? Some people may think: I don't have to go out to buy things or sell things anyway. Why should I go out, sit at home, play computer, watch TV and eat snacks? How nice. In this way, everyone does not use their feet, which may make people's feet degenerate. Stay at home. If you don't know anything, look it up on the computer. If you have the answers to all the questions, you don't have to think about it. Just knock on the keyboard and forget the problems in your homework. What if someone is too lazy to move but hungry? Call it an intelligent robot, so you don't have to eat by yourself. You can eat while watching videos and playing games. So, why do you have to eat it yourself? . Seriously, the first one-microcomputer-may degrade people's feet. The second kind-giving what you want-makes human beings greedy. The third type-intelligent robot-enables human beings to eat without hands, which makes human beings dependent. The fourth one-computer question and answer-lets people know the answer without thinking. In a word, I advise mankind, "Don't rely too much on high technology, sometimes exercise and think properly."
Expert comments:
The argument (quantity and content) is improper, the argument (truth and fact) is outdated, the argument technique is single, the argument language is not infectious, and the argument is not profound.
At school, students' schoolbags are big and small, and the small ones can be easily put into desks, but what about the big ones? But I couldn't put it in, and I thought, if I can make the table move, that would be great!
One night, I had a good idea: hollow out the two sides of the desk, and then cut the two sides of the paper into an "I" shape, so that the desk can be moved.
So, I found some small boards downstairs, bought a knife from the canteen, found some nails left over from the previous house decoration at home, and began to plan, first doing the upper part, then the middle part, then trimming the lower part, and finally trimming. After some thinking, I began to do it.
When I do the first half, I cut a rectangular block of wood, then stick two strip boards on both sides of it, and then cut a small rectangular board and stick it under the strip boards to make an "I" shape.
In the middle part, I cut off a rectangular board, glued a similar right-angle board on both sides, and then put the upper part in. At this time, I met a problem: how can I put the upper part in? I thought for a long time before I came up with a wonderful idea: remove a small piece of wood from the top of the right-angle board and it will become a regular strip. So you can put it in. Finally, the stator is used to nail the cut small board firmly, and the problem is solved.
When making the next part, stick four strips of wood under it to make four "legs". In this way, the movable desk is completed.
I think: there are many inconveniences in life that need us to improve. If we observe and think carefully, we can find the mystery and find the solution.
Expert comments:
The center is not prominent
Harm and Control of Noise (Essay on Science and Technology) The sounds that affect normal work and life are collectively called noise. A high decibel is not necessarily noise, and a low decibel is not necessarily noise. For example, if you watch a movie in the cinema, the decibel value of the sound is very high, often exceeding 90 decibels, but it can't be called noise for the people who watch the movie. However, if the sound insulation effect of the cinema is not good, the sound will be transmitted to the adjacent residential building, which may be only 50 decibels after attenuation, but it is noise for the people inside, because the sound causes discomfort.
The following are the reference values of human hearing tolerance: 44 decibels-acceptable level; 55 decibels-I feel a little annoyed; 60 decibels-no drowsiness; 70 decibels-making people nervous; 85 decibels-covering your ears is unacceptable; 100 decibel-can make your ears temporarily lose hearing; 120 db-can instantly pierce your eardrum; 160 dB- broken glass; 200 decibels-causing death. A decibel value below 60 is a harmless zone, 60- 1 10 is a transitional zone, and 1 10 is a harmful zone. This shows how harmful noise is to human body!
Noise pollution mainly comes from car horns, industrial noise, building construction, concert halls, speakers, loud noises and so on. Most of them are man-made. Therefore, as long as everyone is civilized, some noises can be reduced, such as car horns, loud talking and industrial noise. ...
As the saying goes, "there is' noise' above and' silencing' below." Smart people have also come up with many ways to deal with it, such as: inventing sound insulation glass, planting a variety of flowers indoors, and putting a "protective layer" on your ears-earplugs ... There are many ways to deal with noise.
Of course, the best way is to "uproot", so as to eliminate noise permanently and effectively.
Expert comments:
The language is plain and the center is not prominent.
Development of science and technology: Do the disadvantages outweigh the advantages? I think the disadvantages of technological development outweigh the advantages. Nowadays, many high-tech products are constantly emerging, which brings us a lot of convenience, but behind this convenience, there are also many disadvantages.
For example, we have convenient transportation when we go out today, but these transportation will make us lazy. The rapid development of transportation has led to over-exploitation of oil, resulting in energy crisis, environmental pollution, increased haze and species extinction, which has caused respiratory diseases for most people. Not only that, but also the sudden sound of motorcycles, the huge roar of planes and the horn of cars ... will bring trouble to our quiet life.
For example, with the rapid development of military science and technology, various new weapons emerge one after another, and their lethality and destructiveness are becoming more and more powerful. Today, nuclear weapons represent a country's strength, but how many people have been killed by nuclear weapons! What a loss! Without the rapid development of military science and technology, everyone would be much safer.
For another example, with the rapid development of medicine, although drugs can cure many diseases, with the enhancement of drugs, viruses and bacteria are also increasing, prompting humans to create antibiotics. The extensive use of antibiotics is undoubtedly an "exercise" for the resistance of pathogenic bacteria, and "superbugs" are largely spawned by the abuse of antibacterial drugs. If this situation continues to deteriorate, people will face the situation that there is no medicine available when they are infected. Others use drugs to make drugs that are extremely harmful to human beings and illegally sell them. ...
In addition to these hazards, the development of science and technology has many hazards to human beings. In a word, I think the development of science and technology does more harm than good.
Expert comments:
Improper selection of materials and details
Today, my grandma and I exercise in the gym. It's time to go after exercise. Suddenly my grandmother met an old friend and asked me to wait for a while. When my feet were walking around, I walked out of the door and enjoyed the lotus leaves.
The little brother next to him poured water on the lotus leaf, and the bottle was used to hold drinks. I looked into the lotus leaf, and the water was gone. Is it bad or something? Did you come out? No, no, no, that's impossible. Lotus leaves are like bowls that we eat. There must be a mystery. So I went home to find the mystery, asked my mother, she certainly wouldn't, and asked my father, who said he didn't know. You are on your own.
I went into Xinhua Bookstore to find the mystery. I opened all the books about science, but there was no information about lotus leaves. Gee, why didn't I think of that! computer.
I hurried home and turned on the computer to inquire about this mystery. Ah, I finally found that the leaves of the lotus leaf are covered with "hills", and the "hills" are covered with fluff, like dense vegetation on the mountain. At the top of the "mountain bag", there is a "bunker" that is as convex as steamed bread. Therefore, the depression of "Shanbao" is filled with air, thus forming an extremely thin air layer with only nanometer level on the tight leaf surface. Because rain and dust are like giants to these microstructures on the lotus leaf, it is these tiny dual structures that make the contact surface between the lotus leaf surface and water droplets or dust very limited. Therefore, the phenomenon that water drops roll on the leaves and take away dust is produced.
After this investigation, I understand this truth and tell us that there are many similar phenomena in our lives, which need our brains, understanding, observing and discovering. The mystery of fantasy is waiting for you to discover.
Expert comments:
The language is plain and indescribable.
Technology is right beside me. The word technology is familiar to everyone. Simply put, technology is technology. In a broad sense, it refers to the sum of natural science and technology and social science and technology.
Since the reform and opening up, with the passage of time, science and technology have mushroomed in the motherland. Looking around life, technology is everywhere, and technology is by my side!
Walking on the road at night, there are electric lights to illuminate us; Call a friend and take out your mobile phone at your fingertips; Back home, turn on the TV to watch the news, turn on the computer and chat with friends; Mother steamed rice with a rice cooker; Turn on the electric heater; The whole family is sitting around, enjoying the delicious food prepared by my mother with an electric wok ... Do you think we can leave technology anytime and anywhere?
Technology is very useful! For example, if there is no electric car, it will be inconvenient for us to communicate with distant relatives and friends; If there is no EMU, it will be difficult for people to travel everywhere. Without the space shuttle, it would be empty talk for people to go into space; If there were no icebreakers, it would be difficult for us to go to Antarctica. Without space instruments, it would be just an illusion for humans to land on the moon. ...
On the contrary, with technology, our life will be better-with fax, our documents can be easily sent out in an instant! With robots, you can be in a space that people can't reach; Using laser, you can make fitness equipment; With air conditioning, people can feel as comfortable as spring even in hot summer. ...
It is not difficult to see: all this, people enjoy the achievements of science and technology!
This shows that technology has helped us create a superior living environment; Science and technology have improved our quality of life; Technology is the crystallization of the wisdom of people all over the world!
We are engaged in technology, and we should constantly learn new technologies!
Science and technology are around us, and we must vigorously develop science and technology!
Expert comments:
The structure is incomplete, the language is dull, and the center is not prominent.