Most marine biological sewage treatment plants consist of all the following statements except （）.<br>A:aeration tanks<br>B:settling tanks<br>C:disinfection agent<br>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

出自：海船船员证

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