单项选择题
Forecastle deck is located in the ship’s（）.
A.bow stem B.stern C.portside D.starboard side
单项选择题 From（）the mariner can understand the data of tide.
单项选择题 Give a wide berth to the breakwater means（）.
单项选择题 Grade No.1 rubber bales are mixed up（）grade No.4.
