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環境保護 毎日一問(12.21)

2016-12-20View Original

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単一選択問題:糸状菌が過剰に増殖してスラッジ膨張を引き起こした場合、それを抑制するためにを投入できる。A. 石灰 B. 液塩素 C. フェノール D. 硫化物 選択:B

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