【判断题】虚拟是通过某种技术将一个物理实体变为若干逻辑对应物的功能,是操作系统最基本的特征之一。
【单选题】设有2个项目文件:T1.PJX、T2.PJX,2个数据库文件:SJ1.DBC、SJ2.DBC,1个自由表文件:A1.DBF。以下叙述中,不正确的是()。
A.
T1.PJX与T2.PJX可以共享SJ1.DBC文件
B.
A1.DBF自由表添加到SJ1.DBC成为库表以后,就不能添加到SJ2.DBC中
C.
打开T1.PJX文件后,用系统菜单“文件/新建”命令创建的文件都属于T1.PJX项目管理
D.
从T2.PJX项目中“移去”某个数据库时,可以同时删除数据库文件
【简答题】Malcolm X's considerable frustration at his inability to read and write ______ a quest to overcome his deficiencies. (Para. 4)
【简答题】Malcolm X's considerable frustration at his inability to read and write launched him on a quest to overcome his deficiencies.
【单选题】Assume the demand schedule for cookies is downward sloping. If the price of cookies falls from $2.50 to $2.25 per dozen:
A.
the demand for cookies will fall.
B.
the demand for cookies will rise.
C.
a larger quantity of cookies will be demanded.
D.
a smaller quantity of cookies will be demanded.
【简答题】虚拟是通过虚拟技术将( )物理实体变为( )逻辑上的对应物的功能。os中利用( )技术实现虚拟设备,( )用于对存储空间的管理。
【单选题】女性患儿.2岁。呼吸困难,给予氧疗合适的方法是