合成アンモニア 毎日一題（シリーズ87）
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判断：脱硫システムを起動する前には、通常不活性ガスを用いて置換し、システム内の酸素濃度が0.5％未満になるまで行う。答案：正解
評価基準：参加すれば3点、正解すれば8点
正しい、√~~~~~~~~~~~~
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