All modem______are multitasking and can support running several processes simultaneously.

admin2010-04-12  47

问题 All modem______are multitasking and can support running several processes simultaneously.

选项 A、database
B、operating system
C、MIS
D、DOS

答案B

解析 现在的操作系统都是多任务的,能支持多个进程同时运行。
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