The wing anti-ice system consists _____ air supply ducts, valves, ______, controls and indications.
A.of ,terminal switches
B.up, blow-off door
C.of, leading edge
D.of, gasket
正确答案是A
The wing anti-ice system consists _____ air supply ducts, valves, ______, controls and indications.
A.of ,terminal switches
B.up, blow-off door
C.of, leading edge
D.of, gasket
正确答案是A