单项选择题
A.hoisting；luffing；slewing B.lifting；raising；lowering C.rotating；raising；handling D.hosting；lowering；moving
A warp end may be fitted for operating the derrick topp...
单项选择题A warp end may be fitted for operating the derrick topping wire which adjusts the derrick （）.
A.length B.slack C.height D.rotation direction
These include deck machinery such as mooring equipment,...
单项选择题These include deck machinery such as mooring equipment, anchor handling equipment, cranes and （）.
A.boilers B.bow thrusters C.stabilizers D.hatch covers
The hand steering is a method by which the motion of th...
单项选择题The hand steering is a method by which the motion of the rudder is controlled with （）.
A.a motor-driven steering wheel B.a pneumatic steering wheel C.a hand-driven steering wheel D.an electric steering wheel
