Withthe door closed all day long, the headmaster________ on the plan for the newterm. He hasn`t had his supper yet. A works B. wasworking C. has beenworking D. has worked
【简答题】金融债券作为一种特殊类型的债券,具有以下()特点。I金融债券表示的银行等金融机构与金融债券持有者之间的债权债务关系II金融债券一般不记名、不挂失、不可以抵押和转让III我国金融债券的发行对象主要是个人IV金融债券的利息不记复利,不能提前支取,延期兑付亦不计逾期利息A. Ⅰ、Ⅱ、Ⅲ B. Ⅰ、Ⅱ、Ⅳ C. Ⅰ、Ⅲ、Ⅳ D. Ⅰ、Ⅱ、Ⅲ、Ⅳ