一般情况下,对于普通活性污泥,曝气池内污泥浓度常控制在()克/升之间。
A.2-3
B.3-4
C.4-5
D.5-6
参考答案:A
根据对话内容排序:
A. Anything else?
B. Yes. I would like to have the beef, please.
C. OK. I will get the things ready for you soon.
D. May I take your order, sir?
E. A tomato salad and a bottle of beer.
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我国公共卫生突发事件应现场应急处理的上报体系不包括()。
A.现场急救
B.现场保护和控制
C.现场处分失职人员
D.现场调查和预防