8.网络协议主要要素为（）。

5.网络互联是把网络与网络连接起来，在用户之间实现跨网络的通信与操作技术。（）

4.语义网络表达知识时，有向弧AKO链、ISA链是用来表达节点知识的（）。

路由选择就是指网络中的每个节点具有以最佳路径将分组传送到目标的能力。

6.网络层的中继系统为()。

4.计算机网络是通过通讯线路和网络接口部件将一组位于不同地理位置的计算机系统连接起来，以实现资源共享和相互通讯的系统。（）

9.网络操作系统一般可以分为任务型和通用型两类。（）

8.下面的网络图的关键线路为_____。

9.在网络计划中，若某项工作的_______最小，则该工作必为关键工作。

双代号网络图的三要素是指_______。

2.随着表情包使用量的增加，表情包逐渐成为人们网络社交生活中不可缺少的一部分。人们开始注重对表情包的使用体验，而设计师群体的进入则为表情包增添了不少新意。（）

PartIVReadingComprehension(1*10=10%)Directions:Thereare2passagesinthispart.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA,B,CandD.YoushoulddecideonthebestchoiceandblackenitontheAnswerSheet.Passage1ItwasMonday,andMrs.Smith’sdogwashungry,buttherewasnotanymeatinthehouse.Consideringthattherewasnobetterway,Mrs.Smithtookapieceofpaper,andwrote:“Givemydoghalfapoundofmeat.”Thenshegavethepapertoherdogandsaidgently,“Takethistothebutcher,andheisgoingtogiveyouyourlunchtoday.”Holdingthepieceofpaperinitsmouth,thedograntothebutcher’s.Itgavethepapertothebutcher.Thebutcherreaditcarefully,recognizeditwasreallythelady’shandwritinganddidashewasasked.Thedogwasveryhappy,andatethemeatupimmediately.Atmidday,thedogreturnedtotheshop.Itgavethebutcherapieceofpaperagain.Afterreadingit,hegaveithalfapoundofmeatoncemore.Thenextday,thedogcameagainexactlyatmidday.Andasusual,itbroughtapieceofpaperinitsmouth.Thistime,thebutcherdidnotlookatthepaper,andgavethedogitsmeat,forhehadregardedthedogasoneofhiscustomers.But,thedogcameagainatfouro’clock.Andthesamethinghappenedagain.Tothebutcher’sfurthersurprise,itcameforthethirdtimeatsixo’clock,andbroughtwithitathirdpieceofpaper.Thebutcherfeltabitpuzzled.Hesaidtohimself,“Thisisasmalldog.WhydoesMrs.Smithgiveitsomuchmeattoeattoday?”Lookingatthepieceofpaper,hefoundthattherewerenotanywordsonit!51.WhenMrs.Smithfoundtherewasnomeatinthehouse,she____________.

Directions:Choosetheonethatbestcompletesthefollowingsentences.51.Thecomputersonthetable______ProfessorSmith.

51.Ittookefforttofocus_________preparinghisclassesorcorrectinghisstudents’work.

51.WhenMrs.Smithfoundtherewasnomeatinthehouse,she____________.