9025.Whichofthefollowingarefireprecautionswhichmustbeobservedwhenworkingonanoxygensystem?1.Display"NoSmoking'*placards.2.Provideadequatefire-fightingequipment.3.Keepalltoolsandoxygenservicingequipmentfreefromoilorgrease.4.Avoidcheckingaircraftradioorelectricalsystems.
发布于 2021-02-19 03:59:30
【单选题】
A 1,3,and4.
B 1,2,and4.
C 1,2,3,and4.
查看更多
- 体验AI问答！更聪明、超智能！
- 一款基于GPT的超级AI助手，可以对话、创作、写文案！
