1. [单选题]船舶生活垃圾及食品废弃物，经过粉碎处理当粒径小于25mm的可在距最近陆地()海里以外投弃。
A. 3
B. 12
C. 24
D. 6
2. [单选题]我国《海船船员发证规则》规定，通过三管轮适任考试和评估者，在______年内,应持海事管理机构核发的船上培训记录簿，完成不少于______个月的船上培训记录簿中所规定的船上培训项目和内容；其中有______个月是在船长或合格的高级船员的监督下履行了相应的机舱值班职责。
A. 4/12/3
B. 5/12/6
C. 5/15/6
D. 5/12/3
3. [单选题]During the watch keeping at sea, the engineer in charge should notify______in the event of any serious occurrence or a situation where he is unsure of the action to take
A. the master
B. the chief engineer
C. the bridge
D. the company superintendent
4. [单选题]The dockers are busy ________ their work
A. in
B. with
C. at
D. by
5. [单选题]禁用沙土覆盖的物品有：
A. 爆炸品
B. 氧化剂
C. 易燃液体
D. 易燃固体
