APU exhaust is _____(沿管道流动/输送) overboard through the _____（尾锥）tail cone of the airplane.
A.ducted， cone;
B.duct, tail;
C.pipe, taicone;
D.ducted, tailcone;
正确答案是D
APU exhaust is _____(沿管道流动/输送) overboard through the _____（尾锥）tail cone of the airplane.
A.ducted， cone;
B.duct, tail;
C.pipe, taicone;
D.ducted, tailcone;
正确答案是D