What are the types of poetry?

There are the Book of Songs, seven-character poems, five-character poems, and modern poetry.

Poetry is a literary genre that expresses emotions and aspirations. According to different classification standards, it can be divided into many categories. It has the following four characteristics: (1) The content of poetry is the most concentrated reflection of social life. (2) Poetry is rich in emotion and imagination. (3) The language of poetry has the characteristics of conciseness, image, harmonious tone, and distinctive rhythm. (4) The form of poetry: it is not based on sentences, but on actions. The division of lines is mainly based on rhythm, not meaning.

1. Classification of ancient poetry:

1. Classification according to rhythm:

It can be divided into two categories: ancient poetry and modern poetry. Ancient style poetry and modern style poetry are concepts formed in the Tang Dynasty, and are divided from the perspective of the rhythm of poetry.

2. Classification by content:

It can be divided into narrative poems, lyric poems, farewell poems, frontier poems, landscape pastoral poems, nostalgic poems (epic poems), chanting poems, and mourning poems. , allegorical poetry.

2. Classification of new poetry:

1. Narrative poetry and lyric poetry: This is divided according to the expression of the content of the work.

2. Metrical poetry, free verse, prose poetry and rhymed poetry: These are classified according to the rhythm, rhythm and structural form of the language of the work. What are the types of concrete?

In engineering design and construction, the word "concrete" is often abbreviated as "concrete".

Concrete definition:

An engineering material made of cement, aggregate and water in a certain mix ratio and hardened through mixing, shaping, curing and other processes.

Types of concrete:

According to different cementing materials, it can be divided into cement concrete, asphalt concrete, gypsum concrete and polymer concrete, etc.;

According to different apparent density , divided into heavy concrete, ordinary concrete, light concrete;

According to different use functions, it is divided into structural concrete, road concrete, hydraulic concrete, heat-resistant concrete, acid-resistant concrete and radiation-proof concrete, etc.;

According to different construction techniques, it can be divided into shotcrete, pumped concrete, vibration grouting concrete, etc.

Concrete can also be classified according to its strength grade.

What are the types of turtles?

The common species are as follows:

The Brazilian red-eared turtle is one of the subspecies of the painted turtle in the family Tetrapidae. Semi-aquatic turtle. Because there are two thick red stripes on both sides of the back of the head, it is also called the red-eared turtle. It is an excellent species among turtles. Native to the Americas, it has high edible, medicinal and ornamental values, and is very suitable for artificial breeding.

Snapping turtle

Snapping turtle is the oldest existing reptile, one of the largest freshwater turtles in the world, and is known as the king of freshwater animals. It is divided into two categories, commonly known as crocodiles. With small crocodile. The big crocodile is also known as the true snapping turtle (produced in the southeastern part of North America), and the small crocodile is also called the pseudo-crocodile snapping turtle. There are four subspecies, namely North America, Florida, South America, and Central America. Common ones include North America and Florida, of which Florida is more expensive due to some man-made reasons. Because of their large size and strong aggressiveness, they have few natural enemies except alligators. It has lost its habitat due to human hunting and is listed as a vulnerable species by the International Union for Conservation of Nature. Later, it was favored by domestic turtle lovers because of its high ornamental value and strong adaptability.

Chinese tortoise

The Chinese tortoise is the most widely distributed and abundant turtle in my country. The whole body is a treasure, and it is regarded as the best food and medicinal supplement in "Shen Nong's Materia Medica" and "Compendium of Materia Medica". China has always regarded it as a symbol of health and longevity. In the international market, Chinese tortoises are very popular. People in Japan, the Philippines, and European and American countries regard it as a symbol of "good luck and longevity".

Yellow-throated Terrapin

Yellow-throated Terrapin is a reptile of the genus Terrapin in the family Chelonidae. It is distributed in Vietnam, Japan, Taiwan Island and the eastern and southern parts of mainland China. , Hainan, west to Yunnan and other places, it is commonly found in mountain basins or river valley waters in hilly areas and semi-mountainous areas, often in small shrubs or grass nearby. What are the types of RNA?

RNA is mainly divided into three categories, namely tRNA (transfer RNA), rRNA (ribosomal RNA), and mRNA (messenger RNA). mRNA is the template for protein synthesis, and the content is transcribed according to the DNA in the cell nucleus; tRNA is the recognizer of the base sequence (i.e., genetic code) on the mRNA and the transporter of amino acids; rRNA is the component that makes up the ribosome and is responsible for protein synthesis. workplace. What are the types of bridges?

According to material:

Wooden bridge, stone bridge, brick bridge, concrete bridge, reinforced concrete bridge

According to appearance:

Beam bridges, arch bridges, cable-stayed bridges, suspension bridges, viaducts, composite system bridges

By purpose:

Railway bridges, highway bridges, pipeline bridges, multi-purpose bridges (overpasses are highway bridges)

According to the crossing objects:

Cross-river bridges crossing rivers Cross-valley bridges crossing valleys Cross-rail bridges crossing railways or highways (also called overpasses) Crossing urban areas, industrial areas or crops The viaducts (also known as trestles) in the area

are divided according to whether the bridge body can move:

fixed bridge, open bridge and pontoon bridge

can be divided according to the total length or span of the bridge. :

Big bridge, medium bridge, small bridge

China’s bridges have generally gone through four stages of development. The first stage is mainly based on the Western Zhou Dynasty and the Spring and Autumn Period, including the previous historical eras. This is the founding period of the ancient bridge. At this time, in addition to the original single-plank bridge and Tingbu bridge, there were mainly two forms of bridges: beam bridge and pontoon bridge. At that time, due to the backward productivity level, most of them could only be built in areas where the terrain was flat, the river was not wide, and the water flow was gentle. The bridges could only be small wooden beam bridges, and technical problems were easier to solve. On rivers with wider water surfaces and faster currents, pontoons are often used. lt;BRgt;The second stage is dominated by the Qin and Han Dynasties, including the Warring States and the Three Kingdoms, and is the period of establishment and development of ancient bridges. The Qin and Han Dynasties were a dazzling development stage in the history of Chinese architecture. At this time, not only bricks, a man-made building material, were invented, but also arch structures with masonry structural systems as the theme were created, thus creating prerequisites for the emergence of arch bridges later. The emergence of iron tools during the Warring States Period also promoted the multi-faceted use of stone in construction, so that new components such as stone pillars, stone beams, and stone bridge decks were added to the bridge based on the original wooden beam bridge. Not only that, its great significance lies in the fact that the stone arch bridge came into being. The establishment of the stone arch bridge played an epoch-making role in the history of ancient Chinese bridge construction in terms of practicality, economy, and aesthetics. The great development of stone beam and stone arch bridges not only reduces maintenance costs and extends the service life of the bridge, but also improves the scientific level of structural theory and construction technology. Therefore, the use of building stones and the emergence of arch technology in the Qin and Han Dynasties was actually a major revolution in the history of bridge construction. Therefore, judging from some literature and archaeological data, around the Eastern Han Dynasty, the four basic bridge types of beam bridge, pontoon bridge, cable bridge and arch bridge had all been formed. lt; BRgt; The third stage was dominated by the Tang and Song Dynasties, including the Jin Dynasty, the Southern and Northern Dynasties, the Sui Dynasty, and the Five Dynasties period. This was the heyday of the development of ancient bridges. The national power of the Sui and Tang Dynasties was stronger than that of the Qin and Han dynasties. The Tang and Song dynasties achieved stability and unity for a long time. Industry and commerce, transportation and science and technology were very developed, making it the most advanced country in the world at that time. After the Eastern Jin Dynasty, due to the migration of a large number of Han noble officials to the south, the economic center moved from the Yellow River Basin to the Yangtze River Basin, which led to great economic development in the southeastern water network area. The great economic and technological development in turn led to the great development of bridges.

Some are one to two kilometers or even five or six kilometers long. For example, there is a "hundred-hole Guantang" towpath bridge in Ruanshe, Shaoxing. It was built during the Tongzhi period of the Qing Dynasty. The bridge is more than 380 meters long and has 115 spans. The bridge deck is made of three strips. It is made of stones, with a flat bottom connected to the water. lt; BRgt; "Curved bridge" is a unique bridge style in gardens, so it is also called garden bridge. Bridges, paths, and corridors are all passages for visitors to enjoy the scenery in the garden. "Scenery is better than a curve." Therefore, bridges in gardens are often made with folded corners, such as the Jiuqu Bridge, to form a folded line that swings back and forth and looks left and right, thereby extending the scenery and enlarging the landscape.

Curved bridges are generally composed of stone slabs and railings. The slabs are slightly higher than the water surface and the railings are low, making the bridge seem to be separated from the water and the space seems to be separated but not separated. It has a particularly implicit and endless meaning. What are the types of hiphop?

Total 10 Old School (a type of hip-hop dance before 1985, which is still very popular today) Poppin' (mechanical dance) Lockin' (lock dance) Breakin' (technical dance type) New School (1985) The latest emerging hip-hop type, based on Old School and based on current music, it is very avant-garde) New Style (a comprehensive variety of dances) HipHop House (mainly brisk steps) Krump (combat dance) New Jazz (sexy and handsome) Fashion) Reggae (cheerful, sexy and charming) What are the types of books

A Marxism, Leninism, *** Thoughts 1 Marx and Engels’s works 2 Lenin’s works 3 Stalin’s works 4 *** Works 5 Marx, Compilation of the works of Engels, Lenin, Stalin, and *** 7 The life and biography of Marx, Engels, Lenin, Stalin, and *** 8 Study and research of Marxism, Leninism, and *** thought B Philosophy 0 Philosophical theory 1 World philosophy 2 Chinese Philosophy 3 Asian Philosophy 4 African Philosophy 5 European Philosophy 6 Oceanian Philosophy 7 American Philosophy 80 Logic Science (General) 81 Logic 82 Ethics 83 Aesthetics 84 Psychology 9 Atheism, Religion C General Introduction to Social Sciences 0 Social Science Theory and Methodology 1 Current situation and overview of social sciences 2 Institutions, groups, conferences 3 Social science research methods 4 Social science education and popularization 5 Social science series, anthologies, and continuous publications 6 Social science reference tools [7] Social science literature search tools 8 Statistics 91 Sociology 92 Demography 93 Management [94] Systems theory (systems, systems engineering) 96 Talents D Politics, law 0 Political theory 1/3 Communist movement, *** 4 Workers, Peasants, youth, women's movements and organizations 5/7 Politics of various countries in the world 8 Diplomacy, international relations 9 Law E Military 0 Military theory 1 World military 2 Chinese military 3/7 Military of various countries 8 Strategy, battles, tactics 9 Military technology 99 Military topography , Military geography F Economics 0 Political economy 1 Economic overview of various countries in the world, economic history, economic geography 2 Economic planning and management 3 Agricultural economy 4 Industrial economy 5 Transportation economy 6 Post and telecommunications economy 7 Trade economy 8 Finance, finance G Culture, science , Education, Sports 0 Cultural Theory 1 Overview of cultural undertakings in various countries around the world 2 Information and knowledge dissemination 3 Science, scientific research 4 Education 8 Sports H Language, characters 0 Linguistics 1 Chinese 2 Chinese minority languages ??3 Commonly used foreign languages ??4 Sino-Tibetan language family 5 Altaic Language 7 Indo-European Language I Literature 0 Literary Theory 1 World Literature 2 Chinese Literature 3/7 Literature of Various Countries J Art 0 Art Theory 1 Art Overview of Countries in the World 2 Painting 3 Sculpture 4 Photography Art 5 Arts and Crafts 6 Music 7 Dance 8 Dramatic Art 9 Film, TV Art K History, Geography 0 Historical Theory, 1 World History, 2 Chinese History, 3 Asian History, 4 African History, 5 European History, 6 Oceanian History, 7 American History, 81 Biography, 85 Literary Archeology, 89 Customs and Habits . 9 Geography Geography Q Biological Sciences 1 General Biology

2 Cytology 3 Genetics 4 Physiology 5 Biochemistry 6 Biophysics 7 Molecular biology 81 Bioengineering 91 Paleontology 93 Microbiology 94 Botany 95 Zoology 96 Entomology 98 Anthropology R Medicine, health 1 Preventive medicine, health Study 2 Chinese Medicine 3 Basic Medicine 4 Clinical Medicine 5 Internal Medicine 6 Surgery 8 Special Medicine 9 Pharmacy S Agricultural Science 1 Basic Agricultural Science 2 Agricultural Engineering 3 Agronomy (agronomy) 4 Plant Protection 5 Crops 6 Horticulture 7 Forestry 8 Animal Husbandry, Veterinary Medicine , hunting, silkworms, bees 9 Aquaculture, fishery T Industrial technology TB General industrial technology TD Mining engineering TE Petroleum and natural gas industry TF Metallurgical industry TG Metallurgy, metal crafts TH Machinery and instrument industry TJ Weapon industry TK Power engineering TL Atomic energy technology TM Electrician Technology TN Radio electronics, telecommunications technology TP Automation technology, computing technology TQ Chemical industry TS Light industry, handicraft industry TU Construction science TV Water conservancy engineering U Transportation 1 Comprehensive transportation 2 Railway transportation 4 Road transportation 6 Water transportation [8] Air transportation V Aviation, Aerospace 1 Research and exploration of aviation and aerospace technology 2 Aviation 4 Aerospace (space navigation) [7] Aviation and aerospace medicine Disasters and their prevention and control 5 Environmental pollution and their prevention and control 7 Waste treatment and comprehensive utilization 8 Environmental quality assessment and environmental monitoring 9 Labor protection science (safety science) Z Comprehensive books 1 Series 2 Encyclopedias, class books 3 Dictionaries 4 Proceedings, complete works, Anthologies, miscellaneous works 5 years, annuals 6 periodicals, serial publications 8 What are the types of book catalogs, abstracts, and index papers

Packaging paper:

White board paper and white card Paper, cardboard, kraft paper, corrugated cardboard, tea board paper, parchment and chicken skin paper, cigarette paper, silicone oil paper, paper cup (bag), base paper, coated paper, cellophane paper, oil-proof and moisture-proof paper, transparent paper, aluminum foil paper, trademark, label paper, fruit bag paper

Printing paper:

Coated paper, newsprint, light-coated paper, light-weight paper, offset paper, writing paper, dictionary paper, book paper

Industrial paper:

Release paper, carbon paper, insulating paper, filter paper, test paper, capacitor paper, plate paper, dust-free paper, impregnated paper, sandpaper, anti-rust paper

Office and cultural paper:

Tracing, drawing paper and other copy paper Art paper, carbon paper, fax paper, printing paper, photocopying paper, photo paper, rice paper, thermal paper, color inkjet paper

Household paper:

Toilet paper, facial tissue, napkin, diaper, sanitary napkin, wet wipes, others

Specialty paper:

What are the types of decorative base paper, water-grained paper, leather-grained paper, gold and silver cardboard, CDs?

Your question is very general

It is classified according to capacity and production process

I suggest you read multimedia books