单项选择题
From（）the mariner can understand the data of tide.
A.cargo plan B.tide table C.port list D.sea litlot
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.
单项选择题 Heights are expressed（）meters above mean high water.
