單項(xiàng)選擇題

When crossing a front,isobars tend to（）.

A.change from smooth curves within the air mass to sharp bends at the front
B.change from sharp bends within the air mass to smooth curves at the front
C.pass smoothly across the front with no change
D.become closer together at the front and pass through in straight lines

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單項(xiàng)選擇題

Details of coast radio stations and radar stations can be found in（）.

A.Admiralty Chart
B.Admiralty Light list
C.Admiralty List of Radio Signals
D.Admiralty Notices to Mariners

單項(xiàng)選擇題

A current perpendicular to a vessel’s track has the greatest effect on the vessel’s course made good（）.

A.at high vessel speeds
B.at low vessel speeds
C.in shallow water
D.in deep water

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When crossing a front,isobars tend to（）.

你可能感興趣的試題

Details of coast radio stations and radar stations can be found in（）.

A current perpendicular to a vessel’s track has the greatest effect on the vessel’s course made good（）.

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