搜索

考试

登录电脑网页、小程序享受畅享刷题等更多功能

After putting on a self-contained breathing appara...

海船船员考试

单选题

After putting on a self-contained breathing apparatus, you open the air supply and hear a continuous ringing of a bell.What does this mean?（）.

发布日期：2021-03-22

A.The unit is working properly

B.The face mask is not sealed properly

C.The air bottle needs to be refilled

D.The air supply hose has a leak

标签： putting self-contained breathing apparatus open

热门试题

热门资讯

暂无相关推荐~

分享给好友

分享到朋友圈

使用浏览器的分享功能，把这篇文章分享出去

确定