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單項選擇題

The amount and accuracy of the information provided on the different charts（）considerably.

A.varies
B.maintains
C.Shifts
D.assembles

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單項選擇題

When you read the sailing directions, you should notice that this is one of a series of publications produced by the（）which should be consulted by users of Admiralty Charts.

A.UK Hydrographic Office
B.IMO
C.International Hydrographic Organization
D.International Association of Classification society

單項選擇題

When are you allowed to throw plastic garbage overboard?（）

A.Being mroe than 25 miles from shore
B.Only at night when it‟s dark
C.Being more than 6 miles from shore
D.Never

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