新闻摄影中使用闪光灯时闪光指数和光圈大小、闪光距离的关系为闪光距离=闪光指数/光圈f系数。

A. In Active Directory, modify the Default Domain Policy. Disable the Do not check for user ownership of Roaming Profile Folders setting.

B. In Active Directory, modify the Default Domain Policy. Enable the Delete cached copies of roaming profiles setting.

C. Log on to all client computers and delete all user profiles from the local hard disks.

D. Log on to all client computers and configure the Number of previous logons to cache setting to 0.