單項(xiàng)選擇題

The two factors which make underwater hull repair difficult are accessibility and the（）.

A.availability of tools
B.shape of the hull
C.pressure exerted by the water
D.threat of progressive flooding

你可能感興趣的試題

The required fireman’s outfits required for ship’s are not to be used for any other purpose EXCEPT for the（）.

A.oxygen and explosion meter when it is used for detection of flare gases
B.self-contained breathing apparatus，when used as protection from gas leaking from a refrigeration unit
C.boots and gloves that are made of rubber or electrically non-conductive material，if used when repairing electrical equipment
D.lifeline，if used by personnel entering a compartment which might be deficient of oxygen

單項(xiàng)選擇題

The radio technician will come aboard（）the repairs.

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