单项选择题
A.number of strands B.number of wires in each strand C.circumference D.diameter
A.and preventer have equal stress B.stronger than the preventer to minimize the danger of separation C.take a lighter load than the preventer as a safety factor D.take the stress in case the preventer parts
A.is stated on the vessel's Certificate of Inspection B.is the number authorized in the Navigation Rules C.depends on the number of lifejackets you carry D.is the number authorized by your license