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单选题
Circle-to-land maneuver is the maneuver made by the pilot to align the aircraft with the landing runway when a linear instrument approach is not possible or required. At tower control airports, air traffic control clearance must be obtained and a visual reference of the airport must be established before such maneuvers can be performed.
A
盘旋着陆机动指当不能或不需直线仪表进近时飞行员为使飞机对准着陆跑道所做的机动动作。在塔台管制机场，必须得到空中交通管制许可，并且建立了机场目视参照后才能做此机动。
B
盘旋着陆机动指当不能或不需直线仪表进近时飞行员为使飞机对准着陆跑道所做的机动动作。在塔台管制机场，必须得到空中交通管制的间隔，并且建立了机场目视参照后才能做此机动。
C
盘旋着陆机动指当不能或不需直线仪表进近时飞行员为使飞机能在着陆场矫正所做的机动动作。在塔台管制机场，必须得到空中交通管制的间隔，并且建立了机场目视参照后才能做此机动。
答案解析
正确答案：B
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