On the composition of mask function

The functional component of the mask, the mask is very effective in preventing the spread of droplets. On the one hand, people's droplets are blocked by your mask, on the other hand, your own droplets are intercepted by your own mask. The following is an essay about the function of masks.

The role of mask ingredients 1 mask was not a necessity in the past, but only when catkins were flying and the wind was biting, people would think of it. However, when the epidemic comes, in order to prevent the spread of the virus, masks have become an indispensable "friend" in everyone's life.

The online class at home for nearly 100 days is finally over, and we are back on campus, and we can learn to play games with our friends again. Wear a mask every day, and enter the school after disinfection and temperature measurement. Only when we exercise and eat, will we take off our masks briefly. After dinner, the teacher will also give each student a new mask, because a mask can effectively isolate droplets for about four hours. The teacher taught us to fold the used masks and throw them into the designated recycling bin. Don't throw them away at will. Only when the discarded masks are disposed of in strict accordance with the requirements, will it not give COVID-19 a second chance to spread, and it will also prevent some unscrupulous merchants from reprocessing and selling the discarded masks.

Last week's handicraft class, the teacher also taught us to make a cartoon mask! While listening to the teacher explain the protective knowledge of masks, I designed my own masks, and my affection for masks deepened inexplicably.

Only with a small mask can the epidemic be effectively controlled. I hope the epidemic will end soon, so that we can breathe fresh air freely without wearing masks when we go to school and go out!

Composition 2

Masks have become postcards in 2020. Seemingly ordinary, it has played a great role in human society.

To avoid interpersonal communication. It has effectively stopped the spread of the virus in the air, and people have begun to snap up masks. The masks in the shops were snapped up, some were sold at high prices, some engaged in online fraud in the name of "buying masks", and some merchants sold inferior masks for profit regardless of people's lives. "Selling masks" is like a mirror, reflecting people's hearts. Some people say that the world is really cold!

No, I saw such a scene in the video. The little boy was supposed to give the plastic bottle in his hand to the old man who collected waste products to sell money. He noticed that the old man was not wearing a mask. He immediately returned to his father's side, grabbed the mask that his father held in his hand, handed it to the old man, put it on carefully and tidied it up. I was moved by this scene, perhaps when I saw the little boy and his father fighting for the mask, or when he arranged the mask for the old man, what moved me was sensible, innocent and kind. You see, masks have also become postcards of people's friendly exchanges.

With the resumption of work and production, the epidemic situation was controlled, and the state took advantage of Socialism with Chinese characteristics's system to organize enterprises to work overtime to produce masks. When the government calls, enterprises respond one after another; Overseas students and overseas Chinese are looking for masks in their countries and bringing them back to the motherland ... They are ordinary people, and they are using their meager strength to contribute to the fight against the epidemic and unite our vigorous strength in fighting the epidemic. Mask is a symbol of national cohesion.

"Mountains and rivers are exotic, the sun and the moon are the same day" is an attached poem when a Japanese friend donated a mask to China; Yesterday, countries supported China; Today, China supports it. The spirit of world harmony, human fraternity and the community of human destiny is also revealed in a small mask.

Although the mask is small, it connects the people with the whole country, the people of China and the people of the world. "There is no clothes, and a robe; You said you had nothing to wear, just like your son? Put on a mask to fight the epidemic and usher in spring!

The role of the mask composition 2 Do you find that the current mask is different from the previous mask? What is the difference? One is because of the meaning of masks, and the other is because of the money of masks.

Significance of masks: Now, because of novel coronavirus, masks have played a great role. They can help us prevent novel coronavirus infection. In the past, we didn't think it was important to wear a mask or not. Wearing a mask is useless and a waste of money. But now no one dares to think so. This time, novel coronavirus has dealt a great blow to us human beings. Wearing masks is for our own safety and for the safety of others. So everyone should wear a mask when going out, wear a mask at work, wear a mask at school and so on. Although wearing masks is uncomfortable, we must wear masks for our safety.

Mask price: I am also worried about the mask price now. Masks used to cost a few dollars a pack, but now they sell dozens of packs. This is not the most worrying thing. The biggest worry is that masks are scarce now, so most people are not worried about the high price of masks now, but because masks are too important. Although the virus is under control, the state stipulates that we must wear masks whenever we go out. Now some people express their opinions on the Internet: Why are the masks in the store so expensive? He also said that shop owners still consider their own interests, regardless of the safety of others. In fact, their understanding is wrong. The shopkeeper also replied helplessly: the price of masks we imported is the same, and we have hardly increased the price. We buy goods from importers. Why do we need these masks if they are still sold at the original price? So now everyone is arguing about masks.

So now that we know the importance of masks, we should cherish them. It is not shameful to use masks sparingly, but it is shameful to waste masks.

Composition 2

This winter vacation is very unusual. The hateful novel coronavirus, which is menacing, wandering wantonly and extremely cunning, has infected many people and even claimed many lives.

In order to defeat the virus, everyone in the country is responding to the call of the country and is preventing and controlling the epidemic. The broadcast in the community is broadcast every day: "COVID-19 can be prevented and controlled, go out less, wash your hands frequently, open more windows for ventilation, and remember to wear a mask when you go out ..." Masks can prevent viruses? Despite some doubts in my heart, I consciously put on a mask when I went out with my father that day. However, it didn't take long to wear it, and I felt a little difficult to breathe and uncomfortable. I glanced at the people around me, and no one noticed me. Look at dad, he is walking in front of me. Give me a break. I quietly pulled the mask down. Unexpectedly, my father saw me just after I showed my nose. "Put on a mask!" "He told me sternly to help me popularize the role of masks.

It turns out that people spit out many invisible droplets when they talk, cough or sneeze. Droplets may carry all kinds of viruses and bacteria. These viruses and bacteria will enter the respiratory tract through the crowd or nasal cavity, causing infection. Wearing a medical mask can effectively prevent most droplet infections and protect yourself and others. Oh, it seems that the small mask has played a great role in the prevention and control of the virus this time, and has made great contributions!

The two work best together. With the concerted efforts of Qi Xin, Qixin will surely defeat COVID-19 and usher in a day when everyone can breathe freely.

The role of masks Composition 3 The role of wearing masks

Usually it can prevent virus and bacterial droplet infection, and wearing a mask can also prevent pollen allergy, which is very beneficial to allergic rhinitis and asthma.

Secondly, when the smog weather is serious, it can also prevent smog and reduce the occurrence of respiratory diseases. Wearing a mask can also block the damage of ultraviolet rays to facial skin, and people with bad breath will not feel embarrassed when wearing a mask. Wearing a mask can also isolate bacteria in the air in time, better protect your immune system, and finally wear a mask to keep warm and other benefits.

Matters needing attention

From the physiological structure of human body, because the blood circulation of nasal mucosa is very strong, the passage in nasal cavity is very tortuous, and nasal hair constitutes a "barrier" for filtration. When air is inhaled into the nostrils, the airflow forms a vortex in the tortuous channel, which warms the airflow inhaled into the nasal cavity.

Experiments show that when cold air at minus 7℃ is inhaled into the lungs through the nasal cavity, its airflow has been heated to 28.8℃, which is very close to the temperature of the human body. If you wear a mask for a long time, it will make the nasal mucosa fragile and lose the original physiological function of the nasal cavity, so you can't wear a mask for a long time.