题目内容

死区现象，即水体富营养化的根本原因是________________。

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Which of the following reactors has a continuous input, output, and are completelymixed?

A. Batch reactor
B. Chemostat
C. Plug flow reactor
D. Swquencing batch reactor

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We can enumerate cells in pure cultures by all of the following EXCEPT: ()

A. Most probale number
B. Plate counts
C. turbidity
D. PCR

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Acetate is added to sites that have both Uranium and Iron in subsurface, which:

A. gets oxidized and it oxidizes both Iron and Uranium rendering them immobile
B. gets oxidized and it reduces both Iron and Uranium rendering them immobile
C. is oxidized by Geobacter and the consequent products immobilize Iron and Uranium
D. is more effective than addition of lactate when it comes to Uranium sequestration

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Which of the following intermediates is the last step in biodegradation of many aromatic compounds, because upon its degradation the aromatic ring breaks and is easily degraded:

A. benzendiol
B. catechol
C. benzoate
D. o-cresol

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