A.the equator
B.a great circle
C.a small circle
D.a meridian
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A.the equator
B.a loxodromic curve
C.a small circle
D.a meridian
A.Great circle
B.Equator
C.Small circle
D.Meridian
A.great circle
B.loxodromic curve
C.small circle
D.gnomonic curve
A.be green in color
B.have an even number
C.be left to port when entering from seaward
D.be cylindrical in shape
A.fixed red light
B.Morse (A) white light
C.green light
D.flashing red light
最新試題
A yellow buoy may exhibit a(n)（）.
A parallel of latitude other than the equator is a（）.
An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol? （）
An orange and white buoy with a rectangle on it displays（）.
A preferred-channel buoy will show a（）.
A plane perpendicular to the polar axis will never form what line on the Earth’s surface? （）
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A V-shaped ripple with the point of the V pointing upstream in a river may indicate a（）.
Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic? （）
A special mark (yellow buoy)，if lighted，may exhibit which light rhythm?（）