Official 34 Lec 2
Question 4 of 6
What does the professor suggest about methane and hydrogen gas?

A.

They have beneficial uses if harnessed and contained.

B.

They are destroyed in a later stage of APS processing.

C.

They are both extracted during the first phase of APS digestion.

D.

They are necessary to activate the anaerobic digestion process.

正确答案:A

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