计算机系统中,内存通常分为物理内存和
A. 逻辑内存
B. 缓冲内存
C. 实际内存
D. 高速内存
进程是程序的一次执行过程,是操作系统进行资源调度和分配的一个独立单位,其基本特征是
A. 并发性,实用性,交互性
B. 共享性,动态性,成批性
C. 并发性,异步性,分时性
D. 动态性,并发性,异步性
Each Cell of Asynchronous Transfer Mode (ATM) has fix length. How long is it
A. 50B
B. 51B
C. 52B
D. 53B
N-S diagram can used to substitute conventional program flow Chart.In the following phrases,Which does not belong to the basic control structures that contain
A. sequence structure
B. condition Structure
C. selection structure
D. execution structure