填空题

A．menu B．password
C．account D．full screen
E．update F．operation system
G．save as H．read only memory
I．code J．buffering
K．double click L．exit
M．virus N．file
0．create a new folder P．clear
Q．register R．page setup
S．host T．image
51．( )清除 ( )双击
52．( )另存为 ( )缓冲
53．( )全屏 ( )升级
54．( )新建文件夹 ( )注册
55．( )退出 ( )操作系统