40. The function of a cardinal buoy is to indicate a specific cardinal point from a fixed object. Which of the objects below cannot be indicated by cardinal buoys？
(A) wrecks
(B) shallow water
(C) bridge spans
(D) banks

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統計： A(30), B(44), C(120), D(45), E(0) #3457471

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#6725696
1. 題目解析 本題主要考查「基本浮標」...
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