单项选择题
First,clean the ()(锚链舱)!
A. chain pipe B. chain locker C. hawse pipe D. anchor
单项选择题 Lower the anchor until it is clear of ()(锚链筒).
单项选择题 The ()(系泊缆绳)consist of a head line ,two breast lines, two spring lines and a stern line.
单项选择题 black cone()