下列选关于国际货物买卖合同说法正确的是（）
简述滞期费和速遣费的含义。
Wesincerelyhopethatthistransactionwillturnouttothesatisfactionofbothparties.
GeneralCargoRatesarenormallyhigherthanSpecificCommodityRatesinaircargotransportation.
Wehavebeenimportingandexportingallkindsofmetalsandmineralsfor30yearsandhavemanycustomersandfriendsinover80countriesandregions.
