單項選擇題No navigational aids are shown and the chart is not kept corrected for alterations in depths inside the pecked lines. For more detailed information, the larger scale charts must be().

A.referred to
B.appreciated
C. met with
D.concerned


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2.單項選擇題Of the following,()is not a wind.

A.bora
B.gust
C.gregale
D.floe