死锁的四个必要条件是（）,（）,不可抢夺资源和循环等待资源.

M：I sent a letter to make a reservation for a single room a few days ago．W：Im sorry，but your request arrived too late．There me some conferences in town this week and were full up．Q：Why couldnt the man book a room as he wished?（）

A．Because all rooms are taken.
B．Because many spare rooms are available.
C．Because there are only double rooms.
D．Because there is just a single room.

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把逻辑地址转变为内存的物理地址的过程称作重定位，它分为（）和（）两种形式，在现代操作系统中都采用动态重定位形式来实现这种地址转换. 点击查看答案