当设计的飞机用于低速飞行时,通常会采用涡轮螺旋桨发动机。( )
A.When an airplane is designed to fly at lower speeds, the turboprop is usually the engine choose B.When an airplane is designed to fly at lower speeds, the turboprop is usually the engine chosen. C.When an airplane is designed to fly at lower speeds, the piston propeller engine is usually chosen正确答案B
