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为了解金属冶炼行业排放的工业废气对人体健康的危害，以本市焦化厂周围两自然村为污染区，距焦化厂２０ｋｍ以外的两自然村为对照区，分别对在校儿童发铅含量进行测定。污染区选择７～１４岁在校儿童１６０名（男８２名，女７８名），对照区选择７０名（男３６名，女３４...
In order to understand the harm to human body caused by the industrial waste gas discharged from the metal smelting industry, taking the two natural villages surrounding the coking plant in this city as the polluted area and the two natural villages 20 km away from the coking plant as the control areas, the lead content in school children was measured respectively. The polluted area chooses 160 children (82 males and 78 females) from 7 to 14 years old and 70 from the control area (36 males, 34 females ...).