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相关题目
单选题
When pilots set a pressure of 29.92 in mercury to indicate （ ） .
单选题
The term “L/MF” means （ ） .
单选题
An （ ） is established in each （ ） to provide area control service.
单选题
When Beijing time is 0801, Zulu time should be （ ） .
单选题
“Z” is a common term used by pilots to represent （ ） .
单选题
Emergency frequency is （ ） .
单选题
“PAN” is the international RTF（ ） signal.
单选题
“MAYDAY” is the international RTF （ ） signal.
单选题
According to ICAO definition, a condition concerning the safety of an aircraft or other vehicle or of some person on board or within sight but which does not require immediate assistance is （ ） .
单选题
There are （ ） VHF channels provided for the aviation voice communications.
