随着光纤技术、多媒体技术、高分辨率动态图像与文件传输技术的发展,CCITT希望设计出将语音、数据、静
A.B-ISDN
B.Fast Ethernet
C.Internet
D.Switching LAN
A.B-ISDN
B.Fast Ethernet
C.Internet
D.Switching LAN
A. 图像的分辨率与数据文件的大小成正比;
B. B.如果显示其中的图像会有方块效应;
C. C.图形由空间分布的像素的集合来表示;
D. D.不仅有数据还有命令。
A、流媒体将视频和音频等多媒体文件经过特殊的压缩方式分成一个个压缩包,由服务器向用 户计算机连续、实时传送
B、使用流媒体技术观看视频,用户应将文件全部下载完毕后才能看到其中的内容
C、实现流媒体需要两个条件,一是传输协议的支持,二是缓存
D、使用流媒体技术观看视频,用户可以执行播放、快进、快退、暂停等功能
A.This is a one-dimensional array of records, also called a table.
B.This is so called record of arrays;
C.The event can occur in up to 20 places and on up to 5 different dates in each place.
D.A reference to r.place[i].date[j].mo will access the month of the jth occurrence, in the ith place, of
A.In -s/etc/hosts myfile
B.In -s myfile/etc/hosts
C.link -s/etc/hosts myfile
D.link -s myfile/etc/hosts
A.In -s/etc/hosts myfile
B.In -s myfile/etc/hosts
C.link -s/etc/hosts myfile
D.link -s myfile/etc/hosts
A.Reusability
B.Maintanence
C.Expansibility
D.Portability
A.Reusability
B.Maintanence
C.Expansibility
D.Portability
A.It takes the place of the final system.
B.It assists in gathering software requirements
C.It assists in estimating the cost of the project.
D.It is used as the foundation of the larger projects.
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