A . RR=0
B . RR>0
C . RR<1
D . RR>1
E . RR=1
[单选题]当某种因素与疾病无关联时()A.O=R-OB.OR>0C.OR<1D.OR>1E.OR=1
[单选题]当某种因素与疾病无关联时A.RR=0B.RR>0C.RR<1D.RR>1E.RR=1
[单选题,A1型题] 当某种因素与疾病无关联时()A . O=R-OB . OR>0C . OR<1D . OR>1E . OR=1
[单选题]当某种因素与疾病无关联时A.RR=0B.RR>0C.RR<1D.RR>1E.RR=1
[单选题]当某种因素与疾病无关联时( )。A.RR=0B.RR>0C.RR<1D.RR>1E.RR=1
[单选题]当某种因素与疾病无关联时( )。A.RR=0B.RR>0C.RR<1D.RR>1E.RR=1
[单选题]当某种因素与疾病无关联时( )。A.RR=0B.RR>0C.RR<1D.RR>1E.RR=1
[单选题]当某种因素与疾病无关联时A.O=R-OB.OR>0C.OR1E.OR=1
[单选题]当某种因素与疾病无关联时A.RR=0B.RR>0C.RR1E.RR-1
[单选题]当某种因素与疾病无关联时( )。A、RR=0B、RR>0C、RR1E、RR=1当某种因素与疾病无关联时( )。A.RR=0B.RR>0C.RR<1D.RR>1E.RR=1