Scientific and technological papers are a style in which teenagers theoretically analyze and summarize the achievements made in participating in scientific and technological activities. It is different from the writing style of poetry, prose, fairy tales and fables, and also different from the writing style of narrative, expository and travel notes, and has its own characteristics. Although the style of scientific papers is small, the objects of research and expression are not necessarily small, and the conclusions drawn are not necessarily small. Many small papers also provide a lot of enlightening and valuable scientific data for scientific experts, and even find some phenomena and laws that even scientists have not noticed. A good scientific paper may produce positive economic and social benefits, so it is necessary to be familiar with and master its writing.

I. Basic requirements

1, science. Scientific papers are not limited to natural sciences, but also social sciences such as history and Chinese, so scientific papers must be based on scientific and technological facts and laws.

2. innovation. It must be one's own original opinion, and there must be new discoveries, inventions or opinions, even problems that I don't think others have discovered or studied. It is forbidden to simply repeat problems that others have studied.

3. Daniel Scientific papers are not literary works, so they should not be described. The terminology must be accurate and the words should be simple and clear. Don't overembellish or exaggerate the metaphor, and don't be too long.

4. specifications. The writing of letters, symbols and units of measurement must conform to national regulations or international rules.

Second, writing preparation

1, topic selection. Generally speaking, we should start with the practical problems that need to be solved in production, life and study, and start with the hot issues that people pay attention to. You can also choose topics from the perspective of policies and decrees, or find out the "faults" of conclusions that people think are impeccable from the perspective of rebellious psychology. The topic should be small and the angle should be new.

2. Data preparation. It is necessary to collect and sort out the necessary information, conduct on-the-spot investigation and experiment records, consult and visit relevant professionals, and make information cards.

Third, the writing format

1, topic Requirements are concise and novel, attracting readers.

2. Name of the author. The author is responsible for the article. If several people are writing articles at the same time, they are mainly direct participants.

3. Instruct (or train) teachers. If not, don't write.

4. Abstraction. This is the epitome of the basic content of the paper. The requirements are short and pithy.

5. introduction Generally, the motivation, purpose and origin of this research can be briefly explained, but it should not be the same as abstraction or become an abstract explanation.

6, the text (also known as this theory). Generally, it consists of three parts: research (or observation and investigation) methods, research results and analysis and discussion. In the part of research methods, it is necessary to write clearly the materials used in the research, the objects of investigation, the external conditions, the source (acquisition or purchase) of equipment or materials, and the methods used. The method used should be able to withstand repeated verification by others. Research results can generally be based on data, photos of experimental results, etc. The text is best supplemented by tables and drawings. The analysis and discussion must be appropriate, and it is forbidden to jump to conclusions or exaggerate the research results. Finally, I can talk about the practical value, shortcomings and direction of my research.

7. References. Refer to other people's literature to explain the source, and write down the author's name, title, page number, publishing unit and time to facilitate other people's research.

8. Accessories. Including photos (especially comparative photos) and other circumstantial materials.

Subtitle: Han Yu, a great poet in the Tang Dynasty, wrote such a poem: "The rain in the sky is as smooth as crisp, but the grass in the distance is very close." The most important thing is that the benefits of spring are better than cigarettes. " The drizzle in early spring moistens the lush green grass. This scene gives people a lot of warmth and reverie. However. Today, in many places, this beautiful scenery has said goodbye to us. In recent years, acid rain, known as the "death in the air", is like an invisible killer, infringing on our human physical and mental health and affecting human life.

Second, the text:

One of the main causes of acid rain is the massive emission of sulfur dioxide. In recent years, human beings have been seriously harmed by acid rain, which is a chemical war for human beings.

First of all, the effect of acid rain on plants is obvious. Because acid rain inhibits the decomposition of organic matter and the fixation of nitrogen in the soil, it leaches nutrients such as calcium, magnesium and potassium combined with soil particles, making the soil barren and plants difficult to grow. Secondly, acid rain will harm the new bud leaves of plants, because most plants just germinate in spring, and these young leaves often can't stand the washing of sulfur dioxide in acid rain, and are prone to plant diseases and insect pests or dry up, thus affecting their growth and development. According to the survey, the death rate of Pinus massoniana in chongqing nanshan is as high as 60%.

Secondly, the harm of acid rain to human health is particularly prominent. According to the calculation of US government 1980, it accounts for 2% of the total number of deaths in China. In other words, 565,438+0,000 people in the United States died from air pollution. According to a follow-up study in China from 65438 to 2005, the mortality rate of lung cancer in the center of Chongqing is increasing year by year, ranking first in several megacities in China, among which the elderly and fish eggs are the most affected. One of the reasons is that Chongqing is an acid rain-intensive area.

In addition, acid rain has brought great influence to human environment and economic development. According to the investigation of relevant departments, China, Sichuan and Chongqing have long been listed as one of the three major acid rain areas in the world by Chinese and foreign experts. As early as 1993, the results of environmental monitoring in Chongqing showed that the frequency of acid rain here was as high as 80%, the average PH value of acid rain was 4.38, and the lowest was 2.8. Under the harm of acid rain, the buildings in the whole city are dark and dirty, the automobile facilities are rusty, the soil is acidified, the quality of crops and pests and diseases are aggravated, and trees die in pieces. According to the investigation of relevant departments, the annual economic loss caused by acid rain in Chongqing is as high as one billion yuan. In foreign countries, acid rain has also become the "invisible killer" of human beings. A report entitled "Transfer of Acid Rain and Air Pollution" published by the US government in 1984 shows that 9,423 lakes are affected and 2,993 lakes are seriously endangered. In addition, of the 65,438+0,878,777 kilometers of rivers, 78,488 kilometers have been in crisis and 395,065,438+0 kilometers have suffered heavy losses. It can be seen that acid rain has seriously polluted the global ecological environment.

Three. conclusion

To sum up, it proves that acid rain has a great influence on human life. Therefore, human beings should pay attention to acid rain and control it reasonably.