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單項(xiàng)選擇題

NAVTEX transmissions have a designed range of about（）nautical miles.

A.300
B.400
C.500
D.600

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單項(xiàng)選擇題

The NAVTEX receiver can be mounted on（）.

A.on the bridge
B.in the coast station
C.on the forecastle
D.on starboard side

單項(xiàng)選擇題

Ships at sea are in urgent need of MSI because they are（）various kinds of danger.

A.subject for
B.liable to
C.easy to meet
D.always encounter

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