下列四种情况属于承载力极限状态的是()
B
暂无解析
Accordingtoacertaintypeofrate,ashippercannotbechargedlessthantheappropriaterateof4kginmostcases,eventhoughhisparticularconsignmentmayweighlessthanthis,wecallthistypeofrate().
E-commercenotonlyinvolvesexchangesamongcustomers,businesspartnersandvendors,butalsoincludesoperationsthathandledwithinthebusinessitself.
AnAWBiscalleda()iftheaircarrierisnotspecifiedintheairwaybill.
Piggybackisasystemofunitizedmultimodallandtransportby().