单项选择题

A celestial body will cross the prime vertical circle when the latitude is numerically （）.

A.Greater than the declination and both are of the same name
B.Less than the declination and both are of the same name
C.Greater than the declination and both are of contrary name
D.Less than the declination and both are of contrary name

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热门试题

单项选择题

（） is not likely to be a methods of Traffic Separation.

A.Separation of opposing streams of traffic by separation zones or lines
B.The separation of through traffic from local traffic by provision of inshore traffic zones
C.Division of traffic from several different direction into sectors
D.Control of routing traffic through shipping routes

单项选择题

（） is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone.

A.Traffic Lane
B.Roundabout
C.Inshore Traffic Zone
D.Two-way Route