题目内容

防止亚硝酸钠中毒,亚硝酸钠是冬期施工常用的防冻剂,阻锈剂,人体摄入()亚硝酸钠,即可导至死亡。

A. 5mg
B. 10mg
C. 15mg

查看答案
更多问题

分析自己压力的来源,并谈谈如何有效管理自己的压力。

汽车维修确因质量原因造成在维修质量保证期内“汽车无法正常使用”,需要返工的维修作业,叫做“返修”。

A. 正确
B. 错误

监护操作时,其中一人对设备较为熟悉者作监护。特别重要和复杂的倒闸操作,由熟练的运维人员操作,()监护。

A. 工作许可人
B. 工作票签发人
C. 运维负责人
D. 运检部门负责人

A facility used for the discharge of a cargo of a particular hazard,such as chlorine,butane or ethane,must have what to warn water traffic of an immediate danger during fire or cargo release?()

An emergency boat and crew
B. A siren or rotating flashing light
C. Flashing red lights located one-half mile upstream and downstream of the facility
D. Buoys with flashing lights controlled from shore,located one-half mile upstream anddownstream of the facility

答案查题题库