单项选择题

（）objects are those which stand out clearly from the background or other objects and are easily identifiable from a few miles offshore in normal visibility．

A.Conspicuous
B.Permanent
C.Preliminary
D.Temporary

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单项选择题

（）day，pilot flag should be displayed from main mast．

A.From
B.By
C.on
D.With

单项选择题

The heights and soundings of Admiralty chart are expressed（）in Fathoms（）in Meters．

A.either，or
B.neither，nor
C.another，nor
D.other，or

单项选择题

（）is not contained in the NM Weekly.

A.Amendments to Admiralty Sailing Directions
B.Amendments to Admiralty List of Lights and Fog Signals
C.Amendments to Admiralty List of Radio Signals
D.Supplement to Guide to Port Entry