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1989年5月我们对合配市使用煤和煤气的住户进行了污染物浓度的测定,并调查两组居民健康状况。1 随机抽取燃煤10户。燃煤气10户,20户住宅结构相似。各户均在厨房、卧室、室外设点,分别在燃烧
In May 1989, we conducted a survey on the concentration of pollutants in households using coal and gas in cities with matching capacity and investigated the health status of residents in both groups. 1 randomly selected 10 coal-fired. 10 gas-fired gas, 20 residential structure similar. All households are in the kitchen, bedroom, outdoor set point, respectively, in the combustion