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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相关考题
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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
