methods of sampling and test
...取样和试验方法.浸入洗涤粉配方总方法 英文名称: Carpet cleaning products - Methods of sampling and test - General methods for impregnated powder formulations 标准组织: 【BSI】英国标准 正文语种:..
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methods of sampling and test
抽样和试验方法
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Methods The migrant workers aged 18~60 in one east city were chosen by stratified random sampling, and surveyed by a questionnaire about knowledge, behavior of AIDS, and blooded to test HIV antibody.
方法采用分层随机抽样的方法,对东部沿海某市18~60岁外来务工人员进行问卷调查,收集艾滋病知识和行为的信息,并采集静脉血进行艾滋病病毒抗体检测。
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