The joint of the riser in a marine riser system that compensates for heave，the up-and-down motion of a floater，is the（）.

单项选择题The athwartship hull structural members of a ship are（）.

A.stringers
B.girders
C.breasthooks
D.deck beams

单项选择题The antennas of the trucks on deck are not fitted（）.

A.in
B.on
C.out
D.with

单项选择题Ship’s steering gear refers to（）.

A.cargo handling machines
B.deck winches and derricks
C.engine-room tools
D.course controlling system

单项选择题Shell plating is（）.

A.the galvanizing on steel
B.a hatch cover
C.the outer plating of a vessel
D.synonymous with decking

单项选择题Regulations require that access to a cargo pumproom in a tanker carrying grade D liquid cargo，shall be（）.

A.away from galleys，living quarters，or navigation spaces
B.only from areas equipped with power ventilation systems
C.from the open deck
D.isolated from sources of vapor ignition