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單項(xiàng)選擇題

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
D.spiral approaching the poles as a limit

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單項(xiàng)選擇題

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
C.like wide an angle as practicable
D.like wide as angle so practicable

單項(xiàng)選擇題

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

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