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
 以上为机器翻译结果,长、整句建议使用 人工翻译 。
  
 
 
                        
    
    
                
            
                                     
                            
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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。
                                         
                                                    youdao
                                             
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