A.in the presence of oxygen
B.without oxygen
C.in the presence of nutrition
D.without nutrition
您可能感興趣的試卷
你可能感興趣的試題
A.the bacteria
B.oxygen
C.oxidizing function
D.agitation function
A.oxygenating
B.oxidizing
C.deoxygenating
D.proportioning
A.any requirement appointed by the Officer
B.the most suitable requirement
C.the most stringent requirement
D.no requirement
A.plastics
B.comminuted or ground papers, rags, glass, metal etc
C.food waste comminuted or ground
D.Incinerator ash
A.gravity separation
B.use of adsorbents
C.use of flocculents
D.use of chemical addition
最新試題
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
The treatment of the fuel oils involves storage, heating, filtering and（）
The condensers located in various stages of a flash evaporator are cooled by（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
Diesel engine air start system check valves are opened by （）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）