When an airplane is designed to fly at lower speeds, the turboprop is usually the engine chosen. ( )
A.When an airplane is designed to fly at lower speeds, the turboprop is usually the engine choose. B.The turboprop engine is usually chosen to be installed on the airplane which is designed to fly at lower speed. C.When an airplane is designed to fly at lower speeds, the piston propeller engine is usually choser正确答案B
