The disinfection of various compartments in a vessel by filling them with a gaseous agents to destroy rats etc.means（）.

单项选择题（）are to be used for dunnage if you load rice.

A.wooden planks
B.rush mats
C.steel bars
D.wooden planks and rush mats

单项选择题When loading a cargo of taconite，proper sequencing of loading by hatch number is necessary to （）.

A.provide the proper trim
B.prevent negative stability from developing
C.prevent excessive longitudinal stresses
D.control list

单项选择题Prior to being able to sail in a US port，each vessel that carries grain in bulk must have a certificate of loading issued by the（）.

A.American Bureau of Shipping
B.Lloyds of London
C.National Cargo Bureau
D.US Salvage

单项选择题Assuming an even transverse distribution of weight in a vessel，which condition could cause a list?（）.

A.Empty double-bottoms and lower holds，and a heavy deck cargo
B.Flooding the forepeak to correct the vessel's trim
C.Having KG smaller than KM
D.Having a small positive righting arm

单项选择题Bulk cargo refers to（）.

A.cargo which occupies a large volume of space
B.cargo which requires refrigeration
C.cargo which is very dense
D.homogeneous cargo not enclosed in a container