A . 0.3m,0.3m
B . 0.5m,0.3m
C . 0.5m,0.5m
D . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m
[单选题]在一条河流取样垂线上,在水深不足1m时,取样点距水面不应小于(),距河底也不应小于()。A . 0.3m,0.3mB . 0.5m,0.3mC . 0.5m,0.5mD . 0.3m,0.5m