相关1Bytypecostscanbe的文学知识

问题详情：1.Bytype,costscanbe__________(分类)intodirectcostsandindirectcosts.2.Theprimeminister’sfurthervisithas__________(加强)thecooperationbetweenthetwocountries.3.Itwasagreat__________(荣幸)formeto...