When the controller wants to ensure the validity of the Mode C altitude readout, he may say “_______ at 7,500”.
A.verify
B.ensure
C.check
D.identify
正确答案是A
When the controller wants to ensure the validity of the Mode C altitude readout, he may say “_______ at 7,500”.
A.verify
B.ensure
C.check
D.identify
正确答案是A