Two sided like dust expository essay 300 words 40

1. Pesticides: refers to a class of drugs that are used to kill insects, sterilization, and harmful animals (or weeds) in agricultural production in order to protect and promote the growth of plants and crops.

2. Network technology: It is a new technology developed in the mid-1990s, which integrates the scattered resources on the Internet into an organic whole, realizes the comprehensive sharing and organic collaboration of resources, and enables people to transparently use the overall ability of resources and obtain information on demand.

3. Automobile: a modern means of transportation, that is, a vehicle that can be driven by its own power, and can be driven without relying on the track or electricity. Broadly speaking, a vehicle with four wheels is generally called a car.

4. Plastic bags: It is an indispensable item in people's daily life, and is often used to hold other items. It is widely used because of its advantages of cheapness, extremely light weight, large capacity and easy storage, but it is banned by some countries because of the shortcomings of extremely long degradation cycle and difficult processing.

Commonly used food plastic bags are mostly made of polyethylene film.

5. Snake venom: refers to snakes that can secrete special venom, is a fierce predator who loves to deceive, has a cunning personality, and attacks viciously.

The development and change of things are caused by the movement of contradictions, which refer to the relations contained in things that are both mutually exclusive and interdependent, both opposing and unified.

Marxism holds that everything exists as a unity of contradictions, and contradictions are the source and driving force for the development of things. In short, contradiction is the unity of opposites.

The so-called antagonism refers to the mutual exclusion and struggle between the two sides of the contradiction.

The so-called unification refers to the following two situations:

First, the two sides of the contradiction are interdependent under certain conditions, and the existence of one party is premised on the existence of the other, and the two sides are in a unity.

Second, the two sides of the contradiction will each change in the opposite direction according to certain conditions. Therefore, the development of the movement of things is the result of the movement of contradictions, so things always have two sides, both opposite and unified.

The east corner has passed, and it is not too late for mulberry elm.

Shooting star, ephemeral - gorgeous.

Rose, showy - thorny.

The creek is the mother of the sea.

Horizontally, it is a peak on the side of the ridge, and the height is different from far and near.

Scattered into mud and dust, turned into spring mud to protect flowers.

A loss may turn out to be a gain.

Tangerine, born in Huainan, is orange; Born in Huaibei, it is a citrus tree.

There is no such thing as a hopeless situation, only a person who is desperate for a situation.

The reason why people can do it is because they believe that they can.

I walked barefoot all the way and cried that I didn't have a pair of shoes, until one day, I saw a man without feet, and a story about an old man who was terminally ill and the doctor advised him to go out and see if it was good for the condition, and he came to the gallery and saw a painting of the sun falling on a hill and the golden sunlight was a little faint The old man sighed and said, "O sunset..."Ay.

He shook his head and bowed his head silently, and then the owner of the gallery came, smiled at the old man, and said, "Uncle, are you taking a closer look, is that the sunset, you see, there is a faint mist on the painting, and there are dewdrops on the flowers and plants, and it is the sun that has just risen, and everyone is looking forward to a beautiful day." Then the old man noticed that the painting was indeed painted in the early morning, and the owner said, "Look at a thing, have different attitudes, different moods, different views of things, a pessimist, when he sees a bottle of wine that is only half left, he will say, "How is it that such a good wine is only half left?" and the optimist will say to this, "It's really good, and there is still half a bottle of wine, and you have to enjoy it, so an old man like you has a lot to do, why sigh so much?" After listening to this, the old man realized that he still had a lot of things to do, and he had to reflect his own value, and the painful life was also a day, and the happy day was also a day, why did he always think about this disease, and he couldn't get along with himself.

At that time, the old man let go of his frown, and lived the life he wanted casually, until the end of his life, and finally left with a smile on his face.

The great inventor Edison, after studying more than 8,000 materials that are not suitable for making filaments, was asked by someone: You have failed more than 8,000 times, what is the use of continuing to research? Edison said, I have never failed, on the contrary, I have found more than 8,000 materials that are not suitable for making filaments.

Think about it from another angle, and the problem is completely different. Sometimes, being able to come out of failure is also a kind of success, and if you dwell on the pain of failure all day long, then you will never succeed.

Newton, when faced with the apple that fell on his head, did not immediately complain like ordinary people, but imagined from a different angle: "Why did the apple fall down?" With this, he became a great physicist and made a career.

There are two sides to everything. When conditions change, so does nature.

Bacteria, there are good and bad. Science and technology have benefits while polluting the environment. **, which can be used to defend the country or to invade.

Pesticides, network technology, oil-burning cars, plastic bags, and more.

There are also oil, pesticides, student computers, glass.

1. Benefits:

1. Online games can relax the mind, release stress and improve reflexes.

2. In online games, we can broaden our horizons and do whatever we want, without any control.

3. Play games on the Internet to make your hands agile, improve your typing skills and the application of computer knowledge.

5. Some online games can add fun to learning.

6. The Internet is of great help to our work and study, such as checking information and so on.

7. Online shopping is available.

2. Disadvantages: 1. Affect eyesight, have no energy in class during the day, and study declines.

2. Let us be overly addicted to the Internet and find it difficult to extricate ourselves.

3. Radiation from computers can affect health.

4. Playing games will lead us down the wrong path and get into bad habits.

5. Playing games can lead to grumpy tempers and loss of interest in learning.

6. Playing games will make us abandon our studies and go to crime.

7. Obsessed with the Internet, you will also spend money everywhere and enter black bars and other places.

A lot, such as human nature, such as colors, such as mentality, everything.

Mobile phones affect a lifetime.

Bring joy.

The four big four of Sada are.

What are the two-sided things in life like gray oak car dust?

For example, "wind" can help people generate electricity, and it plays an important role in people's production and life. Of course, the wind can also cause disasters, but as long as it is used wisely, it can be used by people.

Today I read an article called "If there were no dust", which introduced the role of dust on humans and nature, which made us love science even more.

This short article tells us that although human beings will be harmed by dust and pollute the environment, there are many benefits. Let's talk about the benefits of dust!

The first benefit of dust is that the sunlight in the sky scatters in all directions at the same time, like an infinite number of point light sources. The sunlight is scattered by the dust, and the intensity is greatly weakened, and as a result, the sunlight becomes soft. Without dust, people would not be able to open their eyes.

The second benefit is that in the atmosphere, the gas will scatter blue, violet, and blue light, and because of the presence of dust, there will be seven colors in the sky, that is, the beautiful scenery of the rain and the sunny sky. If there were no dust, the whole sky would always be blue.

The third benefit: because dust has hygroscopic properties. The water vapor in the air will adhere to the dust is the only way to condense into small droplets of rain.

Dust can keep rain floating in the sky for long periods of time. The sunset, sunrise, idle clouds, fog, rainbow, sunset and other meteorological scenery in nature are due to the refraction of sunlight by small water droplets. Without dust, the earth would be wet, and it would be difficult for rain and snow to regulate the climate.

It seems that if there were no dust in nature, nature would be very monotonous.

We humans hate dust so much. Today, in the article "If there is no dust", I understand that things often have two sides, and only by correctly understanding them can we pursue advantages and avoid disadvantages and benefit mankind.

Dust is something that everyone hates, and I am no exception, but after reading the text we studied, "If there is no dust", I realized that dust is also an indispensable thing in human life.

Let's talk about the disadvantages of dust first: dust stains our air, and it also stains our houses, walls, furniture, clothes, and the ** on our hands. They also wear down the smooth parts of the machine, obstruct the pistons of the internal combustion engine, and destroy industrial products.

More importantly, it endangers human health. Therefore, there is a saying that "always be diligent and wipe the Buddha, do not make the dust".

Dust is harmful to us, but it is also of great merit to us.

If there is no dust, strong sunlight will make it impossible to open the eyes, because the dust absorbs part of the sun's rays and scatters light around, like countless electric light sources. The sunlight is scattered by the dust, which greatly weakens its strength and softens it. Dust has a lot of uses.

Without dust, the sky will always be blue, and everything on the ground will be wet, which will also make the natural weather disappear. If there is no dust, nature is very monotonous.

Knowing the harms and benefits of dust, it's time to understand it: dust particles are generally between one millionth of a millimeter and a few hundredths of a millimeter in diameter. The dust that can be seen by the human eye is a behemoth in the dust, and the fine dust can only be seen under an electron microscope.

The main ** of dust over land is: Industrial emissions, combustion fumes, soil dust, etc.

I hope that dust will carry forward its benefits and stop harming human beings.

finely dried powdered particles of soil or other substances; something that has been reduced to a tiny part; Fine powder.

Dust is the enemy of human health, so people especially hate it because it carries many bacteria, viruses and insect eggs everywhere and spreads diseases. Industrial dust and fine dust can make workers suffer from a variety of difficult occupational diseases, excessive dust can also cause environmental pollution, affect people's normal life and work, induce human respiratory diseases and so on.

However, the credit of dust must not be erased. If there is no dust in the atmosphere, sunlight cannot be absorbed, reflected, scattered and refracted, and the sky is either too bright or too dark. Since dust is a hygroscopic particle, without its core, the water vapor in the air cannot condense, and it is difficult for clouds in the sky to form, and the surface of the earth will become arid and barren without the cover of clouds, and the weather will either be too hot or too cold.

Without dust, many harmful rays in the universe would break into the Earth's surface unhindered and pose a deadly threat to humans and various living beings.

Although dust has many problems, its contribution is immeasurable, it can enable the earth to gently obtain the sun's energy, and it can also make the atmosphere have enough condensation nuclei to increase the chance of cloud and rain formation; Regulate the temperature of the earth's surface to make it suitable for the survival and reproduction of life.