第1题:
______ is the result of combining processes of microbial activity and biochemical process.
A.Emulsification
B.Microbial degradation
C.Sedimentation
D.Dissolution
第2题:
下列关系式正确的是()
第3题:
A. BOD5/TOD
B. BOD5/COD
C. BOD5/TOC
D. COD / BOD5
第4题:
化学需氧量COD(Chemical Oxygen Demand)是以化学方法测量水样中需要被氧化的还原性物质的量,这句话对吗?()
第5题:
生化需氧量(Biochemical Oxygen Demand.简称BOD)
第6题:
Deficient oxygen content inside a chain locker can be detected with ______.
A.litmus paper
B.a combustible gas indicator
C.an oxygen breathing apparatus
D.an oxygen indicator
第7题:
耗氧物质的污染指标()
第8题:
When anaerobic bacteria convert the sewage to an inert sludge, .
A.no oxygen is needed
B.oxygen is necessary
C.oxygen is given off
D.no gas is produced
第9题:
化学需氧量(Chemical Oxygen Demand.简称COD)
第10题:
化学需氧量(biochemical oxygen demand BOD)