套期保值有效性

A. 历史经营记录及其经验
B. 品德与诚信度
C. 影响其决策的相关人员的情况
D. 以上都包括

A. Dim ADOcn As New Connection
B. Dim ADOcn As Connection
C. Declare ADOcn As New Connection
Declare ADOcn As Connectio