"In Admiralty Sailing Directions, elevations refer to the height above the ____.
A.mean sea level
B.mean high water spring
C.ground
D.mean low water spring"
正确答案是B
"In Admiralty Sailing Directions, elevations refer to the height above the ____.
A.mean sea level
B.mean high water spring
C.ground
D.mean low water spring"
正确答案是B