A proper look-out must be kept（）.<br>A:only in fog<br>B:only between the hours of sunset and sunrise<br>C:only when entering and leaving port<br>D:at all times

A proper look-out must be kept（）.
A:only in fog
B:only between the hours of sunset and sunrise
C:only when entering and leaving port
D:at all times

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:【10250343】个 (题库试题定时更新)