采用鼓风曝气的传统活性污泥法，曝气池中的MLSS应在（）左右
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高浓度有机废水厌氧处理一般的PH值应严格控制在（）
Rock: ______.Sharon: Very well, and the experiment is nearly finished.
A. How are you？
B. How is the experiment？
C. How are you getting on with the experiment？
D. What do you think of the experiment？
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