A foreign civil aircraft making flight within the territory of the People's Republic of China shall follow a _______ air route, deviation from which is prohibited.
A.assigned
B.approved
C.specified
D.leared
正确答案是C
A foreign civil aircraft making flight within the territory of the People's Republic of China shall follow a _______ air route, deviation from which is prohibited.
A.assigned
B.approved
C.specified
D.leared
正确答案是C