对飞行品质要求最高的是哪个飞行阶段? Which category of flight phases has the highest flying
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对飞行品质要求最高的是哪个飞行阶段? Which category of flight phases has the highest flying quality requirement?
A.A种 Category A
B.B种 Category B
C.C种 Category C
D.D种 Category D

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A
