4-word composition

1: The sun is the most important factor that determines the external environment of the earth. According to the theory of modern astronomers, the sun will provide light and heat to the earth continuously and steadily, and the average radius of the earth's rotation around the sun will remain unchanged for a long time, with only a very small swing at most, and this process will last for at least 4 billion years. After 4 billion years, the sun will gradually expand and evolve into a red giant, and finally completely swallow the earth into its "belly". The influence of the sun on the earth is too great. "As long as the sun roars, the earth shakes immediately." As for human beings, they can't bear any shaking of the earth! However, it is no problem for the sun to provide light and heat for the earth for 4 million years, because in the 4 million years, the energy consumed is less than 1% of the total sun! Therefore, to study the sustainable survival and development of human beings on the earth, we should at least aim at the sustainable survival of human beings on the earth for 4 million years! But the real threat facing mankind comes from mankind itself. If people think that Galileo was the father of modern science 4 years ago, then the development of science, technology, industry and agriculture in these 4 years has far exceeded the achievements in the four million years since human history. At the same time, the resources consumed on the earth in the past 4 years have greatly exceeded the total resources consumed by human beings in the past 4 million years! If we follow the current trend of increasing consumption, what will the earth look like in 4 years or even 4 million years? The resources on the earth can be divided into two categories: one is renewable resources and the other is non-renewable resources. Although human beings can supplement some non-renewable resources by consuming renewable resources, this is limited in quantity after all. Therefore, the survival and development of human beings will ultimately depend on how many years the resources on the earth can maintain the normal life of human beings according to the consumption standards of certain resources. In fact, 4 million years is only a conservative statement. The light and heat of the sun may last longer. Even if some abnormal events occur in the solar system, such as an asteroid hitting the earth, it is unlikely to happen within 4 million years, and people can launch missiles with super destructive power to make asteroids change their course. Therefore, the inhabitants of the earth, at least for a long time, don't have to "worry about nothing"!

Statistics show that at present, 75% of the energy in the world comes from the burning of fossil fuels, which is the biggest pollution source of human health and the chief culprit of the global greenhouse effect. Thermal power generation, transportation and various heating processes all need to burn a lot of coal, oil, diesel oil, gasoline and wood products. In the combustion process, these fossil fuels will emit a lot of harmful gas particles, leading to human respiratory system disorders and cancer. From a global point of view, one of the most serious environmental problems facing the world at present is the continuous increase in the content of greenhouse gases in the atmosphere, which is the most important cause of global climate change. The United Nations hopes that all countries in the world will make great efforts to develop and apply renewable energy sources, including solar energy, wind energy, geothermal energy, bioenergy and water resources, and at the same time increase technological upgrading and transformation of existing mineral energy sources to reduce harmful gas emissions.

scientists have found that there is a hot rock layer with a temperature of more than 1, degrees at several thousand meters on the surface of the earth. It can be imagined that the fiery magma emitted by volcanic eruption originated from this. Scientists call this heat energy a rock geothermal resource. If the heat energy in hot rocks can be taken out and turned into electricity, rocks can also generate electricity. Prior to this, scientists had invented a method of generating electricity by using hydro-geothermal resources, that is, converting the energy of underground steam or hot springs into electric energy, which has accounted for .3% of the total power generation. How to extract the heat energy from underground rocks to generate electricity is a long-term dream of many energy experts.

Two chapters: The power of seeds

There is such a story.

someone asked: what is the most powerful thing in the world? There are many different answers, some say elephant, some say lion, and some say king kong as a joke. Of course, everyone doesn't know how powerful King Kong is.

As a result, all the answers are completely wrong. The most powerful thing in the world is the seeds of plants. The power that a seed can show is simply beyond everything.

here is another story.

People's skulls are combined very tightly and firmly. Physiologists and anatomists have tried everything to separate it completely, but they have not succeeded. Later, someone suddenly invented a method, that is, put some plant seeds in the skull to be dissected, and give them temperature and humidity to make the seeds germinate. As soon as they germinate, these seeds completely separate all the bones that cannot be separated by mechanical force with terrible power. The power of plant seeds is so great.

this may be a little special, which is not easy for ordinary people to understand. So, have you ever seen a grass growing under the rubble and stones? In order to yearn for the sunshine and realize its will to live, no matter how heavy the stones on it are or how narrow the space between them is, it always twists and turns, but stubbornly penetrates to the ground. Its roots drill into the soil, and its buds stand up. This is an irresistible force, and the stones that stop it are also overturned by it. A seed is so powerful.

No one calls the grass Hercules, but its power is unparalleled in the world. This force is an invisible vitality to ordinary people. As long as life exists, this kind of power will appear, and the stones above are not enough to stop it, because it is a force of "long-term war of resistance", which is elastic, resilient and tenacious.

If it falls into the rubble instead of the fertile soil, the living seed will never be pessimistic and sigh. It believes that only with resistance can it be tempered. The grass that comes with fighting spirit at the beginning of life is tough grass, and only this kind of grass can laugh at the potted flowers raised in the glass shed.

Three articles: It has become the symbol of the Chinese nation and the pride of Chinese people. Of course, this is also due to the outstanding people in China.

how many world-famous figures have been produced by the Chinese nation since ancient times?

From Qin Shihuang to Mao Zedong, from Zu Chongzhi to Hua Luogeng, from Yang Liwei to Nie Haisheng and Fei Junlong, and then from Xu Haifeng to Liu Xiang. This impressive achievement after another, which one has not left a footprint in the history of China? Which one has not been affirmed on the world stage?

Now, China's space science and technology has reached the peak of the world. From the successful launch of Shenzhou 5 to the smooth return of Shenzhou VI, it was successful again and again, showing China to the world again!

On July 13th, 21, China successfully applied for the Olympic Games. On August 8, 28, the 29th Olympic Games will be grandly opened in Beijing. The success of the Olympic bid not only realized the dream of China people for centuries, but also made China's sports level recognized by the world.

Now, walking on the street, you will see many foreigners who have come a long way to see the scenery in China. Indeed, China is indeed a tourist destination. The Forbidden City in Beijing, the prairie in Inner Mongolia, the Potala Palace in Tibet, and Xishuangbanna in Yunnan … these are all "paradise on earth" that people yearn for.

Now, with the efforts of several generations, China has got rid of the undignified title of "the sick man of East Asia", but China is still a developing country. I believe that with the efforts of more people, in the near future, those countries and people who humiliated and invaded China will give China a thumbs-up and say in blunt Chinese: China, great!

when a teenager is prosperous, he will be prosperous, and when he is young, he will be strong. We should adapt to the requirements of the development of the times, correctly understand the history and reality of the motherland, enhance patriotic feelings and revitalize the sense of responsibility of the motherland, and establish national self-esteem and self-confidence; Carry forward the great spirit of the Chinese nation, hold high the banner of patriotism, forge ahead, strive for self-improvement, work hard and fight hard, and truly turn patriotism into a trip to serve the country. Study hard to revitalize China today, and contribute to the brilliant future of the motherland tomorrow!

Learn to smile

Life owes us nothing, so there's no need to keep a long face. We should be grateful for life. At least, it gives us life and space to live.

Smile is an attitude towards life, which has nothing to do with wealth, status and situation. A rich man may be worried all day, while a poor man may be in a good mood: a disabled person may be calm and optimistic; A person who is in a good situation may frown, and a person who is in a bad situation may smile ...

It is normal that a person's mood is affected by the environment, but if you are bitter and bitter, you will not change the situation. On the contrary, if you live with a smile, you will increase your affinity, and others will be more willing to associate with you and get more opportunities.

Only those who have sunshine in their hearts can feel the sunshine of reality. If they are always sad, how can life be beautiful? Life is always a mirror, which reflects our image. When we cry, life is crying, and when we smile, life is smiling.

Smiling comes from the heart, and it is neither a fool for the weak nor a flattery for the strong. A flattering smile is a fake smile, but a mask won't last long. Once there is an opportunity, they will take off their masks and show their true colors.

A smile has no purpose. It is the same for both the boss and the doorman. Smiling is a respect for others and life at the same time. Smiles are rewarded. Interpersonal relationships are like the balance of forces in physics. How you treat others will be treated by others. The more you smile at others, the more others will smile at you.

After being misinterpreted by others, you can choose to be furious or you can choose to smile. Usually, a smile is more powerful, because it will shake the other person's heart, and the open-minded tolerance revealed will make the other person feel small and ugly.

those who are clear are clear, and those who are turbid are turbid. Sometimes it is unnecessary to explain and argue too much. Give a smile to those who are unreasonable and deliberately slanderous, and let time prove the rest.

At that time, some people said that Einstein's theory was wrong everywhere, and that there were 1 scientists who jointly testified. Einstein knew this, but he just smiled faintly and said, A hundred? So many people? Just prove that I'm really wrong and come forward alone.

Einstein's theory has stood the test of time, but those people were defeated by a smile.

a smile comes from the heart and cannot be faked. Keep a "smile" attitude, and life will be better. There are setbacks, failures and misunderstandings in life, which is normal. If you want a smooth life, you should first remove the obstacles in your heart. The essence of a smile is love, and those who know how to love will not be mediocre.

Smile is the best business card in life. Who doesn't want to make friends with an optimistic person? Smiling can give yourself a kind of confidence, and also give others a kind of confidence, so as to better stimulate potential.

Smile is the best language among friends. A natural smile is worth a thousand words. No matter whether you meet for the first time or have known each other for a long time, a smile can bring people closer and make them feel warm.

Smiling is a kind of accomplishment, and it is also a very important accomplishment. The essence of smiling is kindness, encouragement and warmth. People who really know how to smile are always easy to get more opportunities than others and always easy to succeed.