Waterproof composition

Fireproof, electricity-proof and waterproof. We have been used to this kind of "three defenses" since childhood, and we don't need to say much to know how important it is. There are many fires and disasters caused by hydropower all over the country every day. Think about how many people are at stake! It is precisely because of a person's negligence that he will hurt himself and others at the same time. Disasters happen to everyone, regardless of wealth, gender and age. If a person lacks due vigilance and basic safety knowledge, once danger comes, the bad luck he may escape will come unexpectedly. Some students have many hidden dangers, especially in fire prevention, electricity prevention and waterproof safety, which are mainly manifested in: poor safety responsibility. Playing with fire, water and electrical appliances in violation of discipline; Carrying kindling and playing with fire in violation of discipline; Setting off firecrackers in festivals does not pay attention to occasions; Bring fire into the mountain forest area to play during the closing period; Use fire, electricity, oil, gas, etc. Violation of operating procedures.

Safety first! Only by paying attention to safety and caring for life can we try our best not to regret what we have done. There is only one life, and there is only one life. Pay attention to safety and make our life colorful. Otherwise, it will hurt not only you, but also others and your family. So we should pay attention to safety anytime and anywhere.

I remember when I was in preschool, as long as it rained, I was very happy, because I could put on a raincoat and rain boots with spongebob patterns. With this "equipment", I am not afraid of getting wet.

But why can raincoats be waterproof? I think it's strange.

As soon as I got home, I asked my father, who said that the raincoat I was wearing was made of waterproof cloth. As for why tarpaulins are waterproof, my father can't say clearly.

Because I like to get to the bottom of any problems I have encountered since I was a child, my father had to promise to go online to find more detailed information.

Later, he told me excitedly: "Everything is made up of molecules. The interaction between molecules of the same substance is called cohesion, and the interaction between molecules of different substances is called adhesion.

When cohesion is less than adhesion, the phenomenon of' infiltration' will appear.

"I asked again," Dad, what is infiltration? "Dad said," When water flows on ordinary cloth, the cloth will get wet. This is the' infiltration phenomenon'.

In fact, the waterproof cloth for raincoats is a special cotton cloth treated with waterproof agent.

The waterproof agent is paraffin emulsion containing aluminum salt.

Paraffin wax becomes fine particles after emulsification, which are evenly distributed on the fibers of cotton cloth.

So when water drops fall on the raincoat, they will roll to the ground along the smooth surface of the raincoat.

"oh! No wonder tents made of raincoats and tarpaulins can shelter from rain!

Waterproof, fireproof composition 1500 words fireproof, electricity-proof and waterproof. This "three defenses" is something we have been used to since childhood, so its importance is self-evident. There are many fires and disasters caused by hydropower all over the country every day. Think about how many people have been hurt! It is precisely because of a person's negligence that he will hurt himself and others at the same time. Disasters happen to everyone, regardless of wealth, gender and age. If a person lacks due vigilance and basic safety knowledge, once danger comes, the bad luck he may escape will come unexpectedly. Some students have many hidden dangers, especially in fire prevention, electricity prevention and waterproof safety, which are mainly manifested in: poor safety responsibility. Playing with fire, water and electrical appliances in violation of discipline; Carrying kindling and playing with fire in violation of discipline; Setting off firecrackers in festivals does not pay attention to occasions; Bring fire into the mountain forest area to play during the closing period; Use fire, electricity, oil, gas, etc. Violation of operating procedures. Safety first! Only by paying attention to safety and caring for life can we try not to regret what we have done. There is only one life, and there is only one life. Pay attention to safety and make life colorful. Otherwise, it will hurt not only you, but also others and your family. Therefore, we should pay attention to safety anytime and anywhere. I recommend some basic principles for students to get out of danger: 1, keep calm, seek advantages and avoid disadvantages. 2. Learn to save yourself and protect yourself. 3. Try every means to keep asking for help. 4. Remember the telephone number: ① "119" fire alarm telephone. ② "110" alarm telephone. ③ "120" first aid. Conscientiously implement the relevant safety system, be prepared, sound the alarm and ensure your own safety. I hope to awaken the students' attention to safety again. The earth woke up and the spring breeze was green. We should plant the seeds of peace in our hearts. When it germinates and blooms and grows into a towering tree, we will certainly reap more peace, happiness and tranquility. ....

Fireproof, Electricity-proof and Waterproof 300-word Composition Mothers and teachers should educate their children to form a good habit of not playing with fire. No unit may organize minors to put out fires. Never throw cigarette butts and kindling. 3. Flammable and combustible materials should not be used in interior decoration. 4. Fire hydrants are safe, so don't damage, occupy or bury them. 5. Take care of the fire fighting equipment. Master the use of common fire-fighting equipment. 6. Do not bring inflammable and explosive articles into public places or take public transportation. 7. Pay attention to the fire signs when entering public places, and remember the evacuation direction. 8. In any case, keep the evacuation passage clear. 9. Anyone finds any behavior that endangers the fire safety in public places. You can report to the public security fire department or the public security personnel on duty. 10. Pay special attention to domestic fire, and don't place flammable and combustible materials near the fire source. l 1。 If gas leakage is found, close the valve quickly, open the doors and windows, and do not touch the electrical switch or use naked flame. 12. Worn and aging wires should be repaired and replaced in time. 13.

I believe that many tragedies can be avoided as long as everyone knows more about fire safety and pays more attention to fire prevention at ordinary times.

I hope everyone can join me and be a citizen with high fire awareness! Fire safety is closely related to our life.

If you don't pay attention to fire safety, the consequences will be unimaginable. However, in case of fire and other dangers, don't panic. Cover your nose and mouth with a wet towel in time, and then try to escape. If it's too late to escape, go to the window and call for help.

Just last Sunday, a family near our community caught fire.

At that time, there were four people in the room, an adult and a child. Because they found out in time, they escaped, so nothing happened.

At this time, there were only two students left in the room, and the fire was still spreading. The situation was so critical that the onlookers immediately dialed 1 19.

However, due to the unknown address, firefighters have not yet arrived.

After discovering the fire, the two trapped students covered their noses and mouths with wet towels in time, blocked the crack of the door with towels, and then stayed away from flammable items such as gas, calmly waited for firefighters, and constantly tried to save themselves.

Finally out of danger safely.

So why did they escape from danger, but many people were killed when other fires broke out? Because the two students were very calm when the fire broke out, and covered their nose and mouth with wet towels in time.

...

How to do a good job of fire prevention with 450 words? We often say this sentence: "Fire and water are ruthless"; A thief steals half and burns half.

This is absolutely correct. There are many examples to prove that fires are likely to happen inadvertently. A cigarette end may be lost, which will lead to a big fire. Many people will have a psychological panic when they encounter a fire, even if they have learned some escape methods. In case of fire, don't panic, escape in an orderly way and call the police. Whether at school or at home.

It can be seen that fire is a catastrophic problem faced by people all over the world.

It has caused many serious losses of life and property to human society.

With the development of social productive forces, social wealth is increasing day by day, and the general trend of rising fire losses and expanding the scope of fire hazards is an objective law.

To say the least, even if the fire is inevitable, as a middle school student who loves life, we should also learn and master fire fighting knowledge, such as the basic knowledge of fire fighting, the basic knowledge of fire extinguishers, fire fighting methods, personnel evacuation and fire escape.

In case of fire, if we are trapped by fire, especially if we are trapped upstairs, we should try our best to save ourselves after dialing 1 19.

If the fire is not big, you can soak quilts, blankets, etc. Rush out of the fire.

At this time, it is necessary to make a decisive decision, and don't hesitate, lest the fire get worse and worse and miss the opportunity to escape.

If you are trapped in thick smoke, covering your nose and mouth with smoke is more terrible than catching fire.

Because smoke contains a lot of toxic and harmful gases, if it is not prevented, it will be smoked down by toxic and harmful smoke, which is often the cause of the highest mortality in fire accidents.

If you must rush out of the smoke area, be sure to cover your nose and mouth with a wet towel and run out as close as possible, so as to reduce the inhalation of smoke and avoid poisoning.

If the building has an evacuation room and evacuation stairs, you can hide in the evacuation room first, or evacuate to a safe place through the evacuation stairs.

If there is a fire in a multi-storey building, the stairs have been burned out, or the fire is quite fierce, you can use tiger windows, balconies, sewer pipes or other objects that can be firmly grounded to escape.

If life is threatened and there is no way out, you can use a rope or tear the sheets into strips to connect them, tie one end to a fixed object, and then slide down along the rope or cloth.

If you decide to jump off a building and flee in despair, you can throw some clothes and quilts underground to increase the buffer, then hold down the windowsill to reduce the height of the jump, try your best to keep your feet on the ground and save your life as much as possible.

"Hidden dangers are more dangerous than open flames, prevention is better than disaster relief, and responsibility is more important than Mount Tai".

We should consciously assume the responsibility and obligation of campus fire prevention, learn more about fire prevention, abide by various fire prevention systems, and actively participate in campus fire prevention, so that the society will form a situation of "everyone cares about fire prevention and pays attention to fire prevention everywhere" and fundamentally reduce or avoid the occurrence of campus fire accidents.

Swimming composition 700 words 1 Everyone has had the first experience, and the most unforgettable thing is my first swimming.

One hot summer last summer, my brother asked me to go swimming in the swimming pool.

It is said that the water here is extremely cool, which is the best way to escape the heat in summer. After listening to this, my brother said that my heart itched and I really wanted to go swimming.

But on second thought, I can't swim. What can I do if something happens?

Thinking of this, I didn't want to go at all. I deliberately made an excuse and said to my brother, "I haven't finished my homework yet." I'm ... I'm not going. Go ahead. I will look after the house at home. "

"But my father seemed to guess my mind and smiled and said to me," Li Zhigan, I guess you are worried that you can't swim, so you deliberately make excuses.

Silly boy, daddy's here! "Hearing this, I had to nod and follow them.

When we arrived at the swimming pool, our father and brother put on swimsuits, and the three of us went straight to the swimming area.

When I got there, I looked around and saw crows and crows in the water. Many people, men, women and children, are swimming in the water.

Some children are holding water polo; Some children were holding lifebuoys ... when I came to my senses, I found my father calling me in the water! But as soon as I went to the pool stairs and looked down, the pool seemed to be an abyss … I was afraid that the water would drown me if it was too deep; I'm afraid the water is too cold, and it will be wordy in the water; I'm afraid that a monster will suddenly appear in the water and grab my foot ... I won't go into the water anyway.

So when I wasn't looking, my father dragged me into the water. I was all thumbs and fell into the pool. I choked on the water, shouted for help, scratched my limbs, swollen my eyes and sneezed.

I was wronged at once, and tears of disappointment poured out at once, blaming my father for deliberately pushing me into the water knowing that I couldn't swim.

Dad saw that it was no good for me to be "hard", so he waited for me to "calm down" and apply both hard and soft.

"Dear son, dad teaches you to swim.

"After hearing this, I nodded in agreement." Hold the tile next to you first, straighten your feet slowly, and then relax until you can't hold your breath.

"I tried to do what my father said, but I didn't straighten my feet or float for too little time, so I thought to myself," Hey! If I had known swimming was so difficult to learn, I wouldn't have learned it.

So, I gradually lost confidence, but just as I was about to give up, I was surprised to find that I floated for 27 seconds without catching the tile.

So I suddenly feel refreshed, and my mood seems to have made a 360-degree turn, from cloudy to sunny, two or three times at a time. After many attempts and failures, I finally learned to swim.

As soon as I got home, I excitedly shouted to my mother, "Mom, I finally learned to swim.

"My mother also praised me:" Son, you are great! "Although I choked a lot of water for the first time, I am finally not afraid of water. Although I don't like others like a duck to water, I believe that with this experience, it will be better next time.

I can't forget my first swim I'm still in the small swimming pool next to the main road of the children's park.

I just entered the first grade of primary school.

Mother watched the students in the swimming pool go upstream and downstream like small fish, envious of others' eyes.

I am secretly pleased that those people can't swim. They swim slowly like goldfish. If I can "breathe" in the water, I can swim like a shark.

Want to go out like a missile in the water! I thought to myself how wonderful my swimming was.

The next day, I asked my mother to take me swimming. I want to jump out of the water like a great white shark and let everyone open their eyes. Unexpectedly, I only jumped five meters! The great white shark I saw in the animal world can jump out of the water in one jump. Are they super swimmers? The water is so cold that it is difficult for penguins to swim in this icy Antarctic, so that they have super waterproof clothes? I stopped going the next day. I think swimming is more difficult than I thought 100 times! If I had known, I wouldn't have studied.

The water is very cold, and I am afraid of this heartless coach.

I had a resolute struggle with the coach. He told me to swim, but I didn't dare, so I played hardball and put one hand on my head.

If someone gives me a brain teaser and asks me when I can drink water without a cup, I will get full marks! I started crying, thinking I was going to drown alive. Swimming to the other side, I grabbed the handrail and ran up, but the coach dragged me down. "Get down, smelly boy."

I won't go anyway, but my mother forced me to go again. I smashed my mother's mobile phone and ended in failure.

After half a year, more people can swim, including my mother.

My mother took me to a gentle coach, overcame my fear and finally learned to swim.

Write a composition with materials. If you want to find a material, you should write it down.

Please choose one or several aspects according to the content provided by the prompt and write your own composition.

With "painful" love, I am a rural child.

As long as I can remember, my father told me many times that the countryside is bitter and the children in the countryside should be strong.

For more than ten years, I have been growing up in a "painful" love.

When I graduated from primary school, the god of luck came to me. Because of my excellent grades, I was admitted to a private middle school in the county for free.

I remember on the first day of school, my father rode a bicycle that accompanied him for more than 20 years and carried bedding for me.

I trotted behind with my big bag on my back.

Along the way, the father and the daughter didn't say a word.

I know, dad is still in a hurry to go to work. He said that ten dollars would be deducted for absenteeism for half a day.

There are as many people coming to the new school as going to the market: cars, vans and motorcycles are parked at the school gate.

Dad leaned his broken bike against a small tree, unlocked it and walked into the crowd with his bedroll.

I followed my father closely for fear of getting separated from him.

I was surrounded by adults, small people, and it took me a lot of effort to squeeze in.

Dad helped me find the dormitory and chose a bed by the window. Dad says it's sunny here, not wet, and warm in winter.

As for other comforts, I didn't say a word. I put down my bedroll and turned away.

"Dad," I shouted, and Dad turned around. "What's the matter?" I looked at my father silently. Father gave a wry smile, turned around and left again.

I held back my tears and made my own bed.

Watching other parents help their children tidy their bedding and things, my tears came down, but I wiped them off at once.

Dad said that children in rural areas need to be strong.

From now on, every school holiday, I will go home by myself, sometimes by car, sometimes on foot.

When I got home, I made my own fire to cook and clean the room, and then I waited for my parents and my brother to come back while reading. This is a habit I have developed for many years and has never changed.

Time flies, and it is three years in a blink of an eye.

The mid-term exam is coming today, and I got up at five in the morning.

My mother didn't come back from work in the factory last night, and my father went to work early. I cooked my own meal and went to the examination room by car after dinner.

Just as I was about to enter the examination room, a familiar figure suddenly appeared in my field of vision.

Unexpectedly, it was dad, riding a broken bike.

Suddenly, my tears swirled in my eyes.

"Dad, why are you here? You haven't done more than ten dollars a day! " , "farm work is busy, my daughter is taking the exam alone, I don't trust, go in quickly, the exam is coming soon, and my father is waiting for you outside.

"Write here, my tears can't help but flow down.

Dad, don't worry, I will do well in the exam, because you are waiting for me outside, and you have entrusted that sentence to me for many years. ...

What is the imitation of waterproof clothing? In fact, the waterproof performance of clothes is different from that of nature. Clothes are made of polyester material, which is not easy to get wet.

It is waterproof by itself.

For a simple lotus leaf in nature.

Its lotus leaf surface bulges into a geometric arrangement, and water molecules can't get in.

This is invisible to the naked eye.

There is also a kind of waterfowl.

His feathers are very oily and there is an arrangement on the surface of his feathers.

So waterproof.

This waterproof performance has been applied to our present life. As for the technology, it is confidential.

So waterproof clothing is not made according to the revelation of nature.

Why can't you swim in the water without parents' consent? Nowadays, there are many drowning incidents among young pupils.

Many teenagers go swimming in the swimming pool without their parents' consent, which leads to those terrible accidents.

It caused tragedy to their families.

There are more and more drowning incidents now. For example, not long ago, such a drowning accident happened: a preschool student and a first-year student of Longmen Zhongmen School in Ding 'an County were playing in their own litchi orchard and unfortunately drowned; 2065438+0210/29 October, a fifth-grade student from Tashi Primary School in Meilan District, Haikou, went to the reservoir to play with two partners, swam in the water and drowned. 165438+1On October 5, a ninth-grade student from Jinshan Middle School in Wenchang City and a seventh-grade student from Huaqiao Middle School in Wenchang City were swimming at the seaside and unfortunately drowned.

There is also a recent incident. Three boys aged 14 went home together and saw a girl aged 13 drowned on the lake. So three boys jumped into the water to save the girl without any protective measures. Unfortunately, three boys and a girl drowned.

Alas, how many lives have disappeared in the water, now let's take a look at how to prevent drowning: First, if you want to go swimming, try to swim together and organize swimming under the guidance of your parents or people familiar with water, so that you can take care of each other.

Second, if accompanied by an adult, you should do a "launching preparation activity" before launching. The time requirement is three minutes to exercise muscles. Otherwise, the leg will cramp and naturally lead to drowning.

If you swim in the swimming pool, you should choose the depth that suits you. Don't blindly enter the deep water area. You should know your own water quality. Don't try to be brave after entering the water. Don't choose those deep lakes or pools to swim in.

Advocate the sport in a regular swimming pool.

Fourth, be clear about your physical health.

How many children ended their young lives in drowning? The above four points must be remembered.

Improve safety awareness in daily life.

Water is ruthless, and people are affectionate.

With the continuous occurrence of drowning accidents, we should be vigilant. These unfortunate moments remind us to cherish life. As long as we pay attention to all kinds of swimming and splashing in our lives and raise our awareness of safety precautions, drowning incidents can still be prevented.

Summer vacation is coming. One day, I invited my brother to swim with me.

We bought tickets at the gate of the swimming pool, and then we were drenched by the automatic sterilizer before entering the pool. "oh! Swimming! " We rushed to the swimming pool quickly.

The swimming pool is crowded with people, some diving and some resting.

I went to the swimming pool, put on waterproof glasses and jumped into the water. "Botong!" "Splash everywhere, my body is cold and cold.

Where's my brother? He paddled on the water with a swimming ring in his arms.

I approached him quietly without being seen. "Hey hey, let you play enough in the water.

Look at it! "I grabbed his foot and dragged him into the water.

"ah!" He burst into tears.

"Ha ha! You sweaty duck, you've been cheated

"I thought to myself.

He watched me hold on to his feet and sprinkled water on me.

I couldn't hold my breath, so I let it go after a few bubbles.

"Oh, no! He took the opportunity to escape.

"I followed.

"Stop! If you don't stop, you will see it.

"Not only did he not listen to me, but he also smiled at me. Instead, he swam faster and faster and dumped me.

I swim happily in the water. Just as I was about to go ashore, I was attacked by a "water monster" with a big nose and big eyes, blocking my way. I looked at it carefully and thought, "Ah! If it's neither too early nor too late, you'd better take bus 36.

"plop! "I jumped into the water and ran for my life.

"Stop! Don't run! " My brother is chasing me.

"Ha ha! Stay in the diving area and see how you find me.

"People in the diving area are wearing goggles. They can't tell you from me.

Finally, my brother finally found me and punched me with the fast water chain fist. "Oh, no! This guy smashed my waterproof mirror! " I was just about to surface when the water "pooped" into my nose. I was so angry that I hit "left hook, right hook, upper hook, lower hook" blindly and then gave you a fatal blow! Straight punch! "These punches are really effective. They also cocked my brother's waterproof mirror and pinched his nose.

"It's getting late. Go home! " Dad said simply.

"All right!" We all answered.

Please indicate the source? Waterproof composition