单项选择题
You should always wear（）when working on deck.
A.helmet B.slippers C.goggles D.immersion suits
单项选择题 （）is the head of the Deck Department.
单项选择题 The man in charge of a ship is（）.He is responsible for the ship ,her cargo and the safety of the crew.
单项选择题 （）is placed in the front of the ship under the water,which eases berthing or ma-noeuvering sideways at slow speed.
