33. The is a specified area designated by appropriate authority, where navigation is restricted in accordance with certain specified conditions.
(A) alert area
(B) restricted area
(C) prohibited area
(D) waiting area
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統計: A(7), B(44), C(15), D(4), E(0) #3414906
統計: A(7), B(44), C(15), D(4), E(0) #3414906