Water is an inorganic substance composed of hydrogen and oxygen, which is non-toxic. It is a colorless and odorless transparent liquid under normal temperature and pressure, and is known as the source of human life. Water includes natural water, rivers, lakes, atmospheric water, seawater, groundwater, etc. Distilled water is pure water, artificial water, and water obtained by combining hydrogen and oxygen atoms through chemical reaction. Water is one of the most common substances on the earth. It is an important resource for all life, including inorganic compounds and human beings. It is also the most important part of organisms. Water
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