"What percentage of the baggage is required to be checked at Security Level 1?
A.25%--50%
B.the percentage is not specified
C.100%
D.5%--15%
正确答案是B
"What percentage of the baggage is required to be checked at Security Level 1?
A.25%--50%
B.the percentage is not specified
C.100%
D.5%--15%
正确答案是B