"Engine bleed air is directed to the wing leading edge in flight. A simple control system, featuring one switch and two shutoff valves, provides high reliability."以上叙述中没有提到的是
A.引气 B.机翼前缘 C.开关 D.排气口正确答案D
"Engine bleed air is directed to the wing leading edge in flight. A simple control system, featuring one switch and two shutoff valves, provides high reliability."以上叙述中没有提到的是
A.引气 B.机翼前缘 C.开关 D.排气口正确答案D
