Read the following questions, read the following and ask questions

This is a father's deepest confession to his daughter when she is an adult. Although he didn't say to his daughter: I love you, daughter, but between the lines is deep love for his daughter:

So the winter is no longer cold, and the winter has the flow of life. Because of the existence of his daughter, his life warmed up. He loves his daughter so much, and understands that love is not always guarded, but to let her understand what life is and what life is, and teach her to be a warm and brave person.

This is the warmest and most sincere father's love in the world.

We will encounter many things in life, there are happy and unhappy; Like, dislike; good times and bad times; good luck and bad luck; When all these changes happen around us, the good, beautiful, and exciting things are always fleeting in memory, while the bad ones, the ones that make people angry, hateful, annoyed, and even disgusted, are always deeply ingrained in the long river of memory, and sometimes they all erupt into pain. Why? As described in this passage of the text"All of this is God's life suffering and responsibility, which is as normal and natural as rivers and rivers, and the days and days.

If we only live in memories, or always pay for our past unsatisfactory, then the sunrise you see is torment, and the sunset you see is the end.

Categories: Science & Engineering.

Problem description: On November 21, 1783, the French young Rozier and another young man successfully carried out the world's first manned flight in a hot air balloon, which lasted 23 minutes and missed a kilometer, and Rozier became a news figure at the time. The following year, Rozier planned to fly over the English Channel in a balloon, and the hydrogen balloon had already been invented, which made him uncertain, whether it was better to fly in a hot air balloon or a hydrogen balloon? In the end, Rozier decided to use two balloons at the same time, that is, a combination of hydrogen balloon and hot air balloon to fly over the Strait of the Returning Liquid.

One day, they combined two small balloons and lifted them into the air. However, shortly after liftoff, tragedy struck, two balloons collided together, and ** happened, and Rozier and another young man lost their young lives. So, what do you think caused this tragedy?

Analysis: A permissible gas, when its proportion in the air is within a certain range, may cause ** (for example, the temperature reaches the ignition point of the gas) - this range is called **limit. Pure hydrogen cannot be burned without oxygen or chlorine.

Its **limit is 4 75.

In the text, the hydrogen balloon touches the hot air balloon, so part of the hydrogen is mixed with part of the hot air, and the temperature reaches the ignition point of the hydrogen at the same time, so the chain reaction is the hydrogen balloon.

To be brief, it is because their understanding of the "** limit" and the nature of hydrogen (only know that the density is small, and they don't know that it can be burned) is too shallow.

A pair of black cloth shoes.

Zhong Lingxiu. (1) The dusk is like blood, and the sunset falls in the sound of gunfire. The twilight gradually became thicker, a row of returning geese carrying crescent moons, crying past, piles of camps were lit under the mountain, and a red light was like a red snake entangled in the mountain. The white bandits pounced on the Red Army positions.

Many people in the Red Army were wounded.

The scout returned, he came back on crawl. A bullet hole in the chest. Behind him was a bloody road, stretching black in the miserable white moonlight.

He lay on the cold rock, dying, but his eyes were not closed.

Go with confidence! I ...... your mother's future”

There was no response, the eyes were still open.

There were many people who comforted him, however, his dazed and dull eyes stubbornly remained open, ...... open

Is it a matter of joining the party? The instructor asked the company commander in a low voice.

The company commander blushed and shook his head. He crouched down silently and took off the black cloth shoes that were on the warrior's feet.

Eyes closed. Although there was no expression on his face, the young and painful heart was clearly safe.

Tears flowed from the warriors, who were more precious than blood. Yes, this is the only pair of cloth shoes in the whole company, and only those who perform the most special tasks have the right to wear them.

At dawn, in the midst of gunfire and firelight, the big Heavy wore these shoes and took the lead in a bloody way. The whole company rushed out.

However, the machine gunner died. (2) He leaned stiffly on the rock, but in his hand he clutched the blood-stained black cloth shoes, as if waiting for ...... in a fool's mind

In that bloody and bloody day, the footprints of cloth shoes extended, snow-capped mountains, grasslands, Yan'an, Beijing ......

1.What are the benefits of using a pair of black cloth shoes as the title of the article?

2.Please summarize the gist of the article in concise language.

3.The seventh paragraph successfully describes the eyes of a Red Army soldier on the verge of death, why his eyes are "stubbornly open"?

4.Combined with the context, this paper briefly appreciates the two sentences of line drawing (1) and (2) in the text.

5.What is the role of the last paragraph in the full text?

2.By recounting the story of the black cloth shoes that were extremely cherished during the war, the article expresses that our soldiers are bent on thinking about the revolutionary ranks and are infinitely loyal to the revolutionary cause.

3.Because the only pair of shoes worn by the whole company on his feet have not been returned to the company.

1) This sentence is a description of the scene, writing the scene of the evening when the war is coming: the sunset is like blood, the geese are singing, and the bonfire of the red snake all exaggerates the tense atmosphere before the war.

2) The word "grasp" writes about the machine gunner's cherishing of black cloth shoes, highlighting the important role of black cloth shoes in the war.

5.At the end, the special role of black cloth shoes in the revolutionary war years is highlighted.

On this cold winter night, Zhang Xiaoke took the nucleic acid test report and silently watched the snowflakes fall outside the window. There was worry and fear on his face. The young man, an ordinary office worker, went to the hospital for a check-up due to feeling unwell and tested positive for the coronavirus.

He immediately went into quarantine** and informed his parents.

His parents, Dr. and Mrs. Ray, are well-known doctors in the city and are highly regarded for their anti-epidemic work. When they learned of their son's test results, they were very worried but still acted calm. He arranged a special isolation room and provided Zhang Xiaoke with adequate medical care.

Dr. Ray is in charge of his son's diagnosis and prescription, while his wife is in charge of providing food and care.

Zhang Xiaoke spent a long time in the isolation room, and during this time, his mood was very low. He felt that his life was imprisoned in this small room, and he could not have contact with the outside world, nor could he see his family and friends. His mood fluctuates every day, sometimes he feels very scared and lonely, sometimes he feels powerless and hopeless.

However, his parents have always been by his side, constantly comforting him and encouraging him, so that he gradually came out of the haze.

After the isolation period ended, Zhang Xiaoke was finally discharged from the hospital. He feels very grateful to his parents and medical staff for their endless love and support. He also realized how precious his physical health was, and he decided to face life with a more positive attitude and be grateful with his actions.

He published an article on social **, thanking all those who have paid for him in this epidemic, and hopes that everyone can protect this wonderful world together. His article received a wide attention and response, and many people were moved.

Stories show us that we can find strength and hope even in the most difficult moments. When we face challenges, don't be afraid and don't back down. We have to believe in our own abilities and strength, and at the same time, we have to believe in the people around us who will always support us and help us through this difficult time.

Like Zhang Xiaoke, we should face life with a grateful attitude, respect ourselves and others, and jointly protect this beautiful world.

And for Dr. and Mrs. Lei, they also got inspiration from this incident. As doctors, they have been fighting for the fight against the epidemic and the health and lives of patients. However, this time, they experienced the process of their family members being infected with the new coronavirus, and deeply experienced the psychological pressure and difficulties of patients and their families.

This cold winter night was full of challenges and difficulties, but in the end, Zhang Xiaoke and his parents took turns to overcome this difficulty, showing the courage and tenacity of human beings. This story teaches us that in the face of life's trials, we must hold on to self-confidence and hope, believing in the power of life and a bright future.

According to the above experimental phenomenon, it can be seen that the pressure relationship between a and b is: pa is greater than pb, and the physical basis is:

The higher the water column, the greater the pressure

2) The faster the fluid velocity, the lower the pressure.

3) The operation of the boat will drive the water movement, and the water in the middle part is driven by the two boats, which is larger than the upper side of the first boat and the lower side of the second boat. According to the speed of the flow, the pressure of the middle water is small, and the boat is pressed in by the water from the outside.

1. Jules Verne.

2. "I no longer feel the weight of my clothes, the soles of my shoes, my airbox, nor the weight of this thick ball, and my head sways in the middle of it, like an almond rolling in its core." He skillfully writes the author's feelings in the water, uses metaphors to write about the softness of water, and also paves the way for a better understanding of Archimedes' physical principles.

1: "Upside down" refers to the real society, the cruel world.

2: The text says that in order to avoid the suffering of the next generation, this is not a modern text, so you can imagine the situation at that time, it was not really able to sit in prison, but I just hoped to use "we" to wake up the world.

3: It's really hard to explain...

4: Obviously emphasized.