单选题The disinfection of various compartments in a vessel by filling with a gaseous agent to destroy rats and all insects pests which act as germ carriers means（）.A displacementB fumigationC dischargingD compensation

A、believed

B、bewildered

C、convinced

D、argued

A、Please fill in this form.

B、Please fill this form.

C、Please fill on this form.

D、Please fill out this form.

A、fill out

B、fill with

C、fill up with

Your vessel has a gasoline engine and a mechanical exhaust ventilation system．BEFORE starting the engine，the exhaust blower should be run long enough to ______．

A.warm up the exhaust blower motor

B.provide a proper supply of fresh air for the engine（s）

C.see the system is in good operating condition

D.insure at least one complete change of air in the compartments concerned

The International Loadline Certificate is a document indicating ______ of the various loadlines of the vessel．

A.functions

B.importances

C.actions

D.positions

The disinfection of various compartments in a vessel by filling with a gaseous agent to destroy rats and all insects pests which act as germ carriers means ______.

A.fumigation

B.discharging

C.Compensation

D.displacement

Please （填写）_____ this visitor’s registry book.

A.fill with

B.fill in

C.fill away

D.fill up

Watertight compartments are separated by ________

A.engine rooms

B.tweendecks

C.dunnages

D.decks and bulkheads

Floors aboard ship are ______．

A.also called decks

B.vertical transverse plates connecting the vertical keel with the margin plates

C.large beams fitted in various parts of the vessel for additional strength

D.found in passenger and berthing spaces only

A vessel is described as a two compartment vessel when it ______.

A.has no more than two compartments

B.has two compartments in addition to the engine room

C.will sink if any two compartments are flooded

D.will float if any two adjacent compartments are flooded