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Water
Water is a chemical compound with the chemical formula H20. A water molecule contains one hydrogen atom and two oxygen atoms. Water is a liquid at standard ambient temperature and pressure though it can be a solid (ice)in low temperatures or evaporate into water vapor a higher temperatures.
Industry: Natural environment
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Water
方差
Natural environment; Water
狀態或 EPA 許可權不達到一定的飲用水標準。水系統必須證明: (1) 它不能滿足 MCL,甚至同時使用最好的提供的治療方法,由於原水的特點,(2) 方差也不會對公眾健康不合理的危險。國家或 EPA 必須審查,並允許公眾意見上,方差每三年。國家還可以授予對水系統,服務人口少,這證明他們是無法負擔所需的治療,用水替代源,或以其他方式符合標準的差異。 ...
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