精选优质文档-倾情为你奉上4,飞行原理(1)How can the stability of the atmosphere be determined?正确答案:A (2)_ prevents air flowing directly from the high pressure area to low pressure area when air moves in a level direction.正确答案:C (3)One purpose of high-lift devices is to正确答案:B (4)The primary purpose of high-lift devices is to increase the正确答案:B (5)Airflow separation over the wing can be delayed by using vortex generators
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