【答案资料】大工17秋《专业英语计算机英语》在线测试2
1单选题(4分)ThetwocomponentsoftheCPUareconnectedbyakindofelectronicroadwaycalleda(an)（）.大连理工大学答案
AUSB
Bbus
Cport
Dkeyboard
正确答案B
2单选题(4分)
Theoperationsystem().
正确答案
3单选题(4分)
（）alsoknownasserviceprogramsperformspecifictasksrelatedtomanagingcomputerresources.
AUtilitiesprograms
BSystemsoftware
COperatingsystem
Dnoneoftheabove
正确答案A
4单选题(4分)
（）Inencryptionatwokeysysteminwhichthekeyusedtolockdataismadepublicsoeveryonecan"lock".Asecondprivatekeyisusedtounlockordecrypt.
AAsymmetrickey
BSymmetrickey
CCoputervirus
DDigitalsignatures
正确答案A
5单选题(4分)
A（）portisaninterfacethatconnectsdevicesbytransferringmorethanonebitatatime.
Aserial
Bparallel
CUSB
Dnoneoftheabove
正确答案B
6单选题(4分)
()softwareusedincorporatenetworks(intranetsandextranets)topreventunauthorizedpeoplefromaccessingthenetwork.
AFirewall
BModem
CHypertext
DTCP
正确答案A
7单选题(4分)
Thecommoninputdevicesarethe（）andthekeyboard.
Aprinter
Bspeaker
Cmonitor
Dmouse
正确答案
8单选题(4分)
A()channelallowssimultaneousmessageexchangeinbothdirections.Itreallyconsistsoftwosimplexchannelsaforwardchannelandareversechannellinkingthesamepoints.
Ahalfduplex
Bfullduplex
Csimplex
Dnoneoftheabove
正确答案B
9单选题(4分)
（）theprocessofcompressingafilesuchthatafterbeingcompressedanddecompresseditmatchesitsoriginalformatbitforbit.
ALossycompression
BLosslesscompression
CBitmap
DVectorimage
正确答案B
10单选题(4分)
()havemorestoragecapacitythandiskettesandalsoofferfasteraccesstothedatatheyhold.
AHarddisks
BOpticaldisks
CZipdisk
DCD
正确答案A
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