A.a helment
B.safety cap
C.an ear plug
D.face mask
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最新試題
The company should establish and maintain procedures to control all documents and date which are relevant to（）.
What is it called when it is possible to ignite the vapour above the oil?（）
What is a CORRECT reply to a pilot’s request, How’s your heading?（）
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
When steering by autopilot,how often should the steering be checked?（）
ECDIS must be able to perform all of the following EXCEPT（）.
Berthing means bringing a vessel to her berth until（）.
Which of the following is not a form of precipitation?（）
Manoeuvring information can not be obtained from（）.
Before any loading takes place any signs of the previous cargo should do（）.