【单选题】
1012、进入受限空间作业，设备内要做氧含量分析，其氧合量值不得低于___。
A. 18
B. 20
C. 21.3
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答案
A
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【单选题】
1018、环境污热事故是指由于违反环境保护法规的经济、社余活动与行为以及意外园素的影响或不可抗拒的自然灾害等原因使环境受到污热，国家重点保护的野生动菌物、向然保护区受到破坏，人体健康受到居害社金经济与人民财产受到损失造成不良社会影响的___事件。
A. 常规性
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1021、在烘炉期间必须进行受热螺栓的热把紧，下列关于热把紧的叙述正确的是___。
A. 在C.OT升至400℃时进行
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C. 在C.OT升至600时进行
【单选题】
1030、裂解炉烧焦过程中基本上分为两步，一步为炉管内表面较为松软的焦被反应，二步为炉管内较为坚硬的塘在大量空气下反应。酒易发性护香过热点的胜___
A. 一步
B. 二步
C. 两个都足
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1031、综合应急预燕应当包据本单位的度急组规机构及其职责、预案体系及响应程序、___、应急培训及预案演练等主要内容。
A. 事故预防及应急保障
B. 编制依据和目的
C. 应急预案管理
【单选题】
1052、应急结束必须明确___事故现场得以控制，环境符含有关标准导致次生、衍生事故隐患消除后经事故现场应备指挥机构批准后现场应您结束。
A. 演练问
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