单项选择题

Which of the following would be the best title for the passage

A．Losing altitude in air cargo shipment.
B．Saying "no thanks" to overnight air.
C．Customer, the king ruled.
D．Exempting freight from scrutiny.
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单项选择题
As used in the text, hybrid networks are best related to
A．a new net of ground connections.
B．security scrutiny on packages.
C．a combination of air and ground.
D．mass transport on special vehicles.
单项选择题
After September 11, long delays of express air shipping often arise because of
A．stricter security regulations enforced.
B．higher payment imposed on customers.
C．stiff competition coming from trucks.
D．failure to cater to customers' needs.
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