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水是工农业生产和人们生活中不可缺少的物质,是构成人体的重要成份。人的生命活动,没有水就不能进行。一般成人在正常情况下一昼夜需水量大约在2000-2500毫升。人是一刻也离不开水的。但是,如果人们用饮了被污染的水,又可发生疾病。由于饮水引起的疾病大致可分为两类:一是人们饮了被致病菌、病毒污染的水后发生的疾病,如痢疾、伤寒、副伤寒、霍乱、传染性肝炎等传染病。二是水中某种微量元素含量过少或过多引起的疾病,如水中缺碘,可引起地
Water is an indispensable substance in industrial and agricultural production and people’s lives and is an important component of the human body. Human life activities, no water can not be carried out. Under normal circumstances, adults generally require about 2000-2500 milliliters of water a day and night. Man is a moment can not do without water. However, if people drink polluted water, disease can occur again. As a result of drinking water disease can be broadly divided into two categories: First, people drink after being infected by pathogens, viruses, water-borne diseases such as dysentery, typhoid fever, paratyphoid fever, cholera, infectious hepatitis and other infectious diseases. Second, some trace elements in water caused by too little or too much disease, such as iodine deficiency in water, can cause