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【单选题】
正常操纵飞机向左盘旋时，下述哪项说法正确？（）.A.
左机翼飞行扰流板向上打开，右机翼飞行扰流板向上打开
B.
左机翼飞行扰流板向上打开，右机翼飞行扰流板不动
C.
左机翼飞行扰流扳不动，右机翼飞行扰流板向上打开
D.
左右机翼飞行扰流板都不动
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