下图是一个软件项目的活动图,其中顶点表示项目里程碑,连接顶点的边表示包含的活动,则里程碑()在关键路径上。活动GH的松弛时间是(请作答此空 )。
本题考查活动图的基础知识。
根据关键路径法,计算出关键路径为A-B-D-I-J-L,其长度为20。因此里程碑B在关键路径上,而里程碑E、C和K不在关键路径上。包含活动GH的最长路径是A-E-G-H-K-L,长度为17,因此该活动的松弛时间为20-17=3。
( )is the process of transforming information so it is unintelligible to anyone but the intended recipient.
As each application module is completed,it undergoes( )to ensure that it operates correctly and reliably.
( )algorithm specifies the way to arrange data in a particular order.
After analyzing the source code,( )generates machine instructions that will carry out the meaning of the program at a later time.
( )can help organizations to better understand the information contained within the data and will also help identify the data that is most important to the business and future business decisions.
浏览器开启无痕浏览模式后,( )依然会被保存下来。
下列协议中,不属于TCP/IP协议簇的是( )。
下列传输介质中,带宽最宽、抗干扰能力最强的是( )。
数控编程常需要用参数来描述需要加工的零件的图形。在平面坐标系内,确定一个点需要2个独立的参数,确定一个正方形需要( )个独立的参数。
某书的页码为1,2,3,...,共用数字900个(一个多位数页码包含多个数字),据此可以推断,该书最大的页码为( )。