题目内容
对声誉良好的预防疾病疫苗进行现场试验时,易发生
2021-10-09
A.入院偏倚
B.现患-新发病例偏倚
C.检出症候偏倚
D.无应答偏倚
E.志愿者偏倚
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25151' and id < 2134439 and id<>'2134439' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25151' and id > 2134439 and id<>'2134439' order by id asc limit 5