题目内容

词汇与结构Transponder codes are transmitted by the transponder in an aircraft to ______ to a secondary surveillance radar interrogation signal.

A. send
B. give
C. receive
D. respond

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词汇与结构A ______ transponder code is assigned by air traffic controllers to uniquely identify an aircraft.

A. special
B. separate
C. discrete
D. different

词汇与结构Most codes can be ______ by aircraft if and when the situation requires or allows it, without permission from ATC.

A. selected
B. given
C. gotten
D. sent

词汇与结构Some transponder codes are generally ______ by ATC units.

A. transmitted
B. assigned
C. made
D. put

词汇与结构For IFR flights, the squawk code is typically assigned as part of the departure ______.

A. information
B. announcement
C. clearance
D. permission