A carbon dioxide fire extinguisher has been partially discharged and should be immediatel..

职业资格 成人英语三级 已帮助 人

A.tagged and restowed properly in its rack

B.weighed and the charge loss recorded

C.given to the chief engineer for recharging

D.tagged "empty" and stowed separately from charged extinguishers

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗