付款交单(D/P)与承兑交单(D/A)都有一定的风险，一般说来，D/A方式风险较小，更易为卖方所接受。

信用证装运期是指( )。

GeneralCargoRatesarenormallyhigherthanSpecificCommodityRatesinaircargotransportation.

Timecharteringmeansthatthechartererhiresthevesselforaperiodoftimewithoutcrew.

E-commercenotonlyinvolvesexchangesamongcustomers,businesspartnersandvendors,butalsoincludesoperationsthathandledwithinthebusinessitself.