Accordingtoacertaintypeofrate,ashippercannotbechargedlessthantheappropriaterateof4kginmostcases,eventhoughhisparticularconsignmentmayweighlessthanthis,wecallthistypeofrate（）.
B
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（）is a document granted by the customs authorities which allows a vessel tostart unloading goods.
Thefollowingservices（）areperformedbytheforwarderonbehalfoftheexporter.
Thescopeoffreightforwarder’sserviceonbehalfofshipperincludes_____.