单项选择题
A vessel fitted with twin screws is easier in（）than a vessel with single screw.
A.turning maneuver B.course setting C.position fixing D.regulating speed
单项选择题 A twin-screw vessel is easier to maneuver than a single-screw vessel because the twin-screw vessel（）.
单项选择题 A twin-screw vessel can clear the inboard propeller and maneuver off a pier best by holding a(n)（）.
单项选择题 A twin-screw ship going ahead on the starboard screw only tends to move（）.
