“Recycle squawk A0612” means _______ .
A.reselect squawk number A0612
B.don’t use A0612
C.who is squawking A0612
D.squawk A0612
正确答案是A
“Recycle squawk A0612” means _______ .
A.reselect squawk number A0612
B.don’t use A0612
C.who is squawking A0612
D.squawk A0612
正确答案是A