单项选择题

Risk of collision exists when an approaching vessel has a(n)（）.

A.generally steady bearing and decreasing range
B.generally steady range and increasing bearing
C.increasing range and bearing
D.decreasing bearing only

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On a gnomonic chart，a great circle track between Los Angeles and Brisbane will appear as a （）.

A.loxodromic curve
B.curved line concave to the equator
C.straight line
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单项选择题

Mariners proceeding across the main routes are recommended to do so at（）.

A.as wide an angle as practicable
B.as wide an angle so practicable
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Mariners proceeding across the main routes are（）to do so at as wide an angle as practicable.

A.recommended
B.reported
C.applied
D.complied