Which of the following insurance coverage cover general average and salvage charges.（）

单项选择题（） 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

单项选择题When the charterer uses more time than time stipulated in a voyage C P to load his cargo， the ship-owner is entitled to（）

A.overtime
B.dispatch
C.demurrage
D.deadfreight

多项选择题A forwarder can perform routine tasks such as loading unloading of goods， storage of goods， etc.on behalf of （）.

A.the importer
B.the exporter
C.the consignor
D.the pilot

单项选择题For consolidated shipments， the freight forwarder may dispatch the consignments of several independent shippers together under one air waybill， known as （）.

A.a substitute AWB
B.a neutral AWB
C.a master AWB
D.a house AWB

多项选择题（） are the barriers to international trade.

A.capital
B.import duties
C.non-tarriffbarrier
D.import quotas