若计算机系统中的进程在就绪、运行和等待3种状态之间转换,进程不可能出现()的状态转换。
A.就绪→运行
B.运行→就绪
C.运行→等待
D.等待→运行
参考答案:D
______the website of the Fire Department in your city, and you will learn a lot about firefighting. [ ]
A. Having searched
B. To search
C. Searching
D. Search
不属于我国东部平原地区多发灾害的是[ ]
A.洪涝
B.干旱
C.寒潮
D.台风