27.Datum means the _______ of reference to which all data as to the depth on charts are referenced.(

問題詳情

27.Datum means the _______ of reference to which all data as to the depth on charts are referenced.
(A)figure
(B)plane
(C)data
(D)point

答案：B
難度：非常困難0
統計：A(1),B(0),C(0),D(2),E(0)