If the aircraft in radio failure receives light signals provided by the controller during daytime, he should acknowledge tower transmission or light signals by .

单选题

If the aircraft is parked on a slope, make sure that wheel chocks are in position

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单选题

The controller may direct the pilot of the aircraft in distress to “squawk Mayday”. If this is the case, the pilot should _______ ．

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单选题

If the aircraft in radio failure receives light signals provided by the controller during daytime, he should acknowledge tower transmission or light signals by .

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单选题

The use of metal in aircraft construction increased.

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单选题

The aircraft may be maintained in accordance with the latest information issued by the manufacturer.

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