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單項選擇題

（）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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單項選擇題

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

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

單項選擇題

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

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