Atmospheres laden with coal dust or grain dust caused by loading these cargoes（）.<br>A:require loading operations to be shut down until the atmosphere clears<br>B:are toxic to human life<br>C:are subject to spontaneous combustion<br>D:may be explosive in some concentrations

Atmospheres laden with coal dust or grain dust caused by loading these cargoes（）.
A:require loading operations to be shut down until the atmosphere clears
B:are toxic to human life
C:are subject to spontaneous combustion
D:may be explosive in some concentrations

出自：海船船员证

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10245188】个 (题库试题定时更新)