Monthly Archives: February 2020

Irrigation

    According to the requirements of crop water demand, artificially to the farmland to replenish water and other measures of farmland. Irrigation can meet the demand for water for crops in time, improve soil water, fertilizer, gas, heat and salt, improve … Continue reading

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Museum of Nature

    Collection, production and display of historic specimens of astronomy, geology, plants, animals, paleontology and humans for scientific research and cultural education. Also known as the Natural History Museum.     A brief history Of the prototype of the Modern Museum of Nature, … Continue reading

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Price Economics

    A discipline to study the formation of commodity prices and the regularity of their movements.     The development of price theory as early as the 7th century BC, China recorded the management of the economic thought of the “tube” book, there … Continue reading

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Care for children

    Health and technical measures related to the prevention and treatment of diseases and the promotion of health in childhood. Including treatment operations, general care, preventive health care, feeding, mental health and corrections. Children live most of the time in the … Continue reading

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Arctic ocean

The world’s smallest and coldest ocean. Located at the northernmost tip of the earth, largeto the Arctic as its center, the Arctic Circle is the ocean surrounded by the northern coasts of Asia, Europe and North America. Read More Arctic … Continue reading

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Northern wei dynasty

    After the division of the 16 countries, the unified feudal dynasty was rebuilt in northern China. one of the Northern Dynasty dynasties. The Ministry of Tuo-Tui-tao is built by the fresh-and-humble nobles (see Wei Daowu Emperor). Read more Northern wei … Continue reading

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