单项选择题

A parallel of latitude other than the equator is a（）.

A.great circle
B.loxodromic curve
C.small circle
D.gnomonic curve

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单项选择题

A.be green in color
B.have an even number
C.be left to port when entering from seaward
D.be cylindrical in shape

单项选择题

A.fixed red light
B.Morse (A) white light
C.green light
D.flashing red light

单项选择题

A.gnomonic curve
B.small circle
C.meridian
D.great circle