如果航空承运人使用的飞机需要配备2名驾驶员与1名飞行机械员作为飞行机组,当发生飞行机械员失能的情况时,航空规章有何要求 ?
A
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ModernEnglishvocabularydevelopsthroughthefollowingchannelsEXCEPT______.
Ifanearthquakeoccurred,someoftheone-storeyhouses________.
DuringtheSecondWorldWar,Roosevelt,StalinandChurchillmetat________.
OxfordAdvancedLearnersDictionary’,3rdEdition(1980),isamongthebest-knownBritish______dictionaries.