单项选择题

Chain suspension ladders on a ship must be replaced by fixed ladders if the required chain suspension ladder（）.

A.has been sent in for repair
B.cannot be supported against a vertical flat surface
C.does not extend to the water when the ship lists 15 degrees
D.is not equipped with vertical guard rails on either side

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单项选择题Any person maintaining a listening watch on a bridge-to-bridge radiotelephone must be able to（）.

A.speak English
B.repair the unit
C.send Morse Code
D.speak a language the vessel's crew will understand

单项选择题Any person maintaining a listening watch on a bridge to bridge radio-telephone must be able to（）.

A.Speak English
B.Repair the unit
C.Speak Spanish
D.Send Morse code

单项选择题Although the parties are entitled to make their contract in any manner that they like，it is usual for them to adopt one of the standard forms and then（）it as they think fit.

A.amend
B.repair
C.improve
D.clear

单项选择题All removals to be reassembled in order（）of repairs.

A.upon commencement
B.on completion
C.before ending
D.after beginning

单项选择题After riveting is completed，the joints on the shell of a vessel are generally made watertight by（）.

A.faying
B.caulking
C.felt or canvas packing
D.red lead