_______ is a power-driven heavier-than-air aircraft, deriving its lift in flight chiefly from aerodynamic reactions on surfaces which remain fixed under given conditions of flight.
A.Tail
B.Wing
C.Aeroplane
D.Engine
正确答案是C
_______ is a power-driven heavier-than-air aircraft, deriving its lift in flight chiefly from aerodynamic reactions on surfaces which remain fixed under given conditions of flight.
A.Tail
B.Wing
C.Aeroplane
D.Engine
正确答案是C