问题
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
答案
参考答案：A
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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
参考答案：A