单项选择题
The lines led forward from the bow and aft from the stern when a vessel is moored to the dock are（）.
A.bow and stern lines B.breast lines C.halyards D.warps
单项选择题 The end of the joint with the exterior threads is called the（）.
单项选择题 The document on a vessel，annually endorsed by an American Bureau of Shipping surveyor，is called the（）.
单项选择题 The conclusion is（）the said ship is fit to continue to sail.
