单项选择题
A.loxodromic curve B.curved line concave to the equator C.straight line D.spiral approaching the poles as a limit
Mariners proceeding across the main routes are recommen...
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 C.like wide an angle as practicable D.like wide as angle so practicable
Mariners proceeding across the main routes are（）to do s...
单项选择题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
Mariners are reminded that they should proceed in the g...
单项选择题Mariners are reminded that they should proceed in the general direction indicated by the arrows or，if（）a lane，they should do so as nearly as practicable at right angles to it.
A.cross B.crossing C.crossed D.crosses
