（）means an observed situation where objective evidence indicates the non-fulfillment of a specified requirement.

单项选择题（）water is the water in the hold to keep the ship’s stability.

A.Bilge
B.Ballast
C.Slop
D.Sanitary

单项选择题Odorous cargoes are those that（）.

A.are exceptionally dusty and leave a residue
B.are liquid but are in containers
C.are susceptible to damage by tainting
D.give off fumes that may damage other cargoes

单项选择题Furnishings for recreational facilities should（）include a bookcase and facilities for reading,writing and,where practicable,games.

A.as a minimum
B.as a maximum
C.as a rule
D.as a result

单项选择题The velocity of the wind，its steady direction，and the amount of time it has blown determines a wind driven current’s（）.

A.temperature
B.density
C.deflection
D.speed

单项选择题When crossing a front,isobars tend to（）.

A.change from smooth curves within the air mass to sharp bends at the front
B.change from sharp bends within the air mass to smooth curves at the front
C.pass smoothly across the front with no change
D.become closer together at the front and pass through in straight lines