_______ is the main source of lift.
AThe difference in pressure between the upper and lower surfaces of the wing
BThe difference in curvature between the upper and lower surfaces of the wing
CThe curvature on the upper portion of the wing
DThe curvature on the lower portion of the wing
相关试题
-
_______ is the main source of lift.
-
The primary source of lift is _______ ．
-
When properly set, _______ is the primary source of heading information.
-
Which of the following components provides a direct source of seawater for the fire main system?
-
_______ is considered a back-up source of heading information.