词汇与结构Unless the airplane manufacturer directs otherwise in the AFM/POH, the first step ______ a fire should be to shut off the fuel supply to the engine.
A. at discovering
B. in discovering
C. to discover
D. on discovering
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词汇与结构If the engine compartment fire is oil-fed, as evidenced by thick black smoke, as ______ to a fuel-fed fire which produces bright orange flames, the pilot should consider stopping the propeller rotation by feathering or other means.
A. similar
B. opposed
C. symbolic
D. contradict
词汇与结构APU allows the aircraft to be independent of______ pneumatic and electrical power supplies.
A. additional
B. specific
C. internal
D. external
词汇与结构The aircraft battery also supplies control circuitry power when the APU battery voltage______ because of heavy starter motor load.
A. aggravates
B. increases
C. drops
D. soars
词汇与结构An amber FAULT light on the APU control panel ______ whenever a fault or fire is sensed.
A. is inhibited
B. illuminates
C. is suppressed
D. deflects