【单选题】
克劳斯催化剂还原操作中保持过程气中硫化氢与二氧化硫比值在___，并运行24小时。
A. 1～2
B. 2～3
C. 3～4
D. 4～5
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答案
C
解析
暂无解析
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A. 马上通知维修部门修理
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