In the International Young Pianists Competition, when it was________that Lang Lang had won, he was

too excited to hold back his tears.[ ]

A. told  

B. mentioned

C. announced  

D. recognized

物资装备部定期通过（）公布各相关方的诚信管理记录，并在中国石化范围内公开共享。

A.电子商务系统

B.供应商管理系统

C.电子招标平台

D.BW数据库