18. 下列何者為我國海圖的水深基準面?
(A) Mean Low Water
(B) Mean Lower Low Water
(C) Mean Low Water Springs
(D) Approximate Lowest Low Water
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統計: A(110), B(108), C(29), D(385), E(0) #1777049
統計: A(110), B(108), C(29), D(385), E(0) #1777049