Most marine biological sewage treatment pl
题型:单项选择题
问题:
Most marine biological sewage treatment plants consist of all the following statements except ().
A.aeration tanks
B.settling tanks
C.disinfection agent
D.anaerobic bacteria
Most marine biological sewage treatment plants consist of all the following statements except ().
A.aeration tanks
B.settling tanks
C.disinfection agent
D.anaerobic bacteria