单项选择题
A ballasted vessel sinks enroute to a dry dock. Under these circumstances，the vessel’s owner can claim（）.
A.actual total loss B.constructive total loss C.general average D.particular average
单项选择题 A backlash below a lock is defined as a（）.
单项选择题 A “spring line” is（）.
单项选择题 A “sheepshank” is used to（）.
