利用液体处理气体或气体混合物中某一组分溶解在液体中的操作过程叫() ["A.抽提","B.吸收","C.萃收"]
四冲程柴油机的一个工作循环的曲柄转角是() ["A.180°","B.270°","C.360°","D.720°"]
防止下游脱硫装置操作不正常,脱硫酸气烃含量不大于() ["A.5%","B.4%","C.3%"]
按原设计要求,一乙醇胺使用浓度应该控制在() ["A.20—25%","B.30—35%","C.15%"]
四冲程柴油机的压缩冲程实际上是从()这一时刻开始的. ["进气阀开","进气阀关","排气阀开","排气阀关"]
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