【判断题】
高危行业、较大危险行业的生产经营单位，应当每半年至少组织一次专项应急救援预案演练。
A. 对
B. 错
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答案
A
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【判断题】
生产经营单位进行有毒有害及受限空间作业、重大危险源作业等危险作业的，应当按批准权限由相关负责人亲自确定作业方案，专人进行现场作业的统一指挥，由专职安全生产管理人员进行现场安全检查和监督，并由具有专业资质的人员实施作业。
A. 对
B. 错
【单选题】
A类投诉为乘客通过各种途径对轨道交通运营服务质量、服务设施、服务环境等表示不满，网络服务监督热线经预判为地铁方面人为责任的___事件。
A. 一般事件
B. 轻度事件
C. 较严重事件
D. 严重事件
【单选题】
上海轨道交通采用计程票制可适应各线路间有较大差异的路网特征及___的优点。
A. 票价结构较为简单
B. 人工设备成本低
C. 可建立乘坐里程与票价之间的合理关系
D. 对计费系统和设备要求较高，票价级数较多
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