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環境保護 デイリークイズ(12.23)

2016-12-23View Original

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単一選択問題:気泡の直径が小さいほど、上昇速度はより速くなり、吸着される不純物との接触時間も短くなるため、気浮効果が向上する。A. 遅い・短い B. 速い・短い C. 速い・長い D. 遅い・長い 選択:D

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