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單項選擇題

（） transport of goods is the principal means of transport in many countries due to the low threshold infrastructure requirements.

A.rail
B.road
C.sea
D.air

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多項選擇題

Customs clearance in the import-export trade is one of the traditional functions of a freight forwarder.Customs clearance measures mainly include （）。

A.declaration
B.document-checking
C.duty- paying
D.cargo-examination

單項選擇題

On traffic lanes where demand is strong and plane capacity is limited， the air rates will be （）and vice versa for traffic lanes where supply exceeds demand.

A.low
B.high
C.normal
D.average

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