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单选题
Before marine sewage treatment plant works （） should be filled with fresh water.
A
deposition chamber
B
oxidation pool
C
disinfection chamber
D
all chamber
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单选题Which of the following is NOT among the solutions to the lack of sewage water treatment plants?A
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Two projects about treatment plants for sewage waters in Vlore and Pogradec.D
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考题
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a new bacteria colony should be put into the plant in advanceB
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单选题The basic process of biological sewage treatment consists of the liquor either by bubbling air through it or by agitating the surface（）A
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单选题（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.A
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单选题A number of biological sewage treatment plants are in use at sea but nearly all work on what is called the extended aeration processBasically the consists of oxygenating the liquor by bubbling air through itAccording to the above two sentences, the word "this" means （）.A
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单选题Most marine biological sewage treatment plants consist of all the following statements except （）.A
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breaking up solid matter into fine particlesB
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