单项选择题
Under the forces of its own weight，the suspended length of line will fall into a shape known as a（）.
A.polygon
B.holding arc
C.catenary curve
D.parabolic curve
单项选择题 There has been a collision in sea area of Fork.（）.
单项选择题 The Master to prosecute all voyages with the utmost（）and to render customary assistance with the Vessel’s Crew.
单项选择题 The major components which determine the length of a catenary in a deployed anchor cable are water depth，cable weight，and（）.