方法采用整群抽样与典型调查结合的方法进行现场调查，结合临床检查、生化分析和毒理学方法进行实验室检测。
Methods Using cluster sampling and typical investigation, a spot research was taken while experimental indexes were determined by clinical, biochemical and toxicologic methods.
方法采用整群抽样与典型调查结合的方法进行现场调查，结合临床检查、生化分析和毒理学方法进行实验室检测。
Methods Using cluster sampling and typical investigation, a spot research was taken while experimental indexes were determined by clinical, biochemical and toxicologic methods.
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