通常来讲，DDA/H与MDA/H的关系是？Generally speaking,what is the relation bet

通常来讲，DDA/H与MDA/H的关系是？Generally speaking,what is the relation between DDA/H and MDA/H？

A.DDA/H低于MDA/H约50英尺。DDA/H 15 meters lower than MDA/H

B.DDA/H高于MDA/H约50英尺。DDA/H 15 meters higher than MDA/H

C.DDA/H等于MDA/H。DDA/H equals to MDA/H

正确答案是B