1. [单选题]MARPOL公约将有毒液体物质污染分为()类。
A. 3
B. 4
C. 5
2. [单选题]轮机长的职责是＿。①负责主机系统，轴系的管理；②进出港备车航行时亲临机舱；③负责机舱人员日常工作的安排和领导。
A. ①②
B. ①③
C. ①
D. ②
3. [单选题]The main propulsion diesel continues running after you try to shut down. You should now attempt to .
A. stop the fuel oil booster pump
B. engage the jacking gear
C. secure the lube oil pump
D. shut off the fuel at the settling tank
