刷新率是指图象在屏幕上更新的速度，其单位是（）

A.Pentium IV
B.Celeron
C.Dulon
D.Cylix

A.Create DOS partition or Logical DOS Drive
B.Set active partition
C.Delete partition or Logincal DOS Drive
D.Display partition information

A.CPU-Z
B.Windows Media Player
C.金山词霸
D.Office XP