With smart phones taking the world by ____ storm, a phone that can only send and receive voice calls and text messages may seem like ____ relic.

A．a; a

B．the; 不填

C．the；a

D．不填; a

富滇银行债券1号理财产品主要投资于银行间债券市场，投资的金融工具包括（）

A.国债

B.央行票据

C.政策性金融债

D.企业短期融资券