"In Admiralty Sailing Directions, height of objects refers to the height of the structure above the ____.
A.mean sea level
B.mean high water
C.mean higher high water
D.ground"
正确答案是D
"In Admiralty Sailing Directions, height of objects refers to the height of the structure above the ____.
A.mean sea level
B.mean high water
C.mean higher high water
D.ground"
正确答案是D