单项选择题
The hinge fitting used to attach the boom to the mast is the（）.
A.gooseneck
B.step
C.swivel
D.pintle
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相关考题
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单项选择题
The heaviest type pallet is the（）.
A.factory pallet
B.shipping pallet
C.stevedoring pallet
D.warehouse pallet -
单项选择题
The head of the bend is the（）.
A.top or upstream beginning of a bend
B.bottom or downstream beginning of a bend
C.midpoint or center radius of a bend
D.center line or apex of a bend -
单项选择题
The firing of a red star signal may mean（）.
A.This is the best place to land
B.You are seen - assistance will be given as soon as possible
C.Tail block is made fast
D.Slack away
