900 句单选 -15 字以上 650[音频][音频]
A. Normal speed
B. Low speed
C. High speed
D. minimum approach speed
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900 句单选 -15 字以上 659[音频][音频]
A. RAT
B. APU
C. Pneumatic cart
D. Engines
900 句单选 -15 字以上 665[音频][音频]
A. Fire extinguisher
B. Fire truck
C. Ground crew
D. external visual observation
900 句单选 -15 字以上 -699[音频][音频]
A. No one was injured during explosion
B. The explosion is caused by hi-jackers
C. Emergency evacuation is in progress
D. The flight crew will give further report on explosion
900 句单选 -15 字以上 -714[音频][音频]
A. The pilot had no time to contact ATC
B. The ATC frequency was occupied
C. The pilot made a descent without ATC approval
D. The flight encountered low-level windshear
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