Most marine biological sewage treatment plants consist of all the following statements except ______.A.aeration(通风) tanksB.settling tanksC.disinfection agent(消毒剂)D.anaerobic bacteria(厌氧菌)
Most marine biological sewage treatment plants consist of all the following statements except ______.
A.aeration(通风) tanks
B.settling tanks
C.disinfection agent(消毒剂)
D.anaerobic bacteria(厌氧菌)
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