It has been________that the gold coin was made five hundred years ago from the date marked on it.[ ]

A. confirmed  

B. reported

C. consulted  

D. concerned

培训项目计划包含的层次有( )。

A．企业培训计划

B．培训人员计划

C．课程系列计划

D．培训阶段计划

E．培训课程计划