2020_2021学年新教材高中英语Unit3TheworldofscienceUsinglanguage课后作业含解析外研版必修第三册202012171256.doc

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1、Unit3TheworldofscienceⅠ.阅读理解Asdataandidentitytheftbecomesmoreandmorecommon,themarketisgrowingforbiometric(生物测量)technologies—likefingerprintscans—tokeepothersoutofprivateespaces.Atpresent,thesetechnologiesarestillexpensive,though.ResearchersfromGeorgiaTechsaythattheyhavecomeupwithalowcostdevice(装置)t

2、hatgetsaroundthisproblem:asmartkeyboard.Thissmartkeyboardpreciselymeasuresthecadence(节奏)withwhichonetypesandthepressurefingersapplytoeachkey.Thekeyboardcouldofferastronglayerofsecuritybyanalyzingthingsliketheforceofauser'stypingandthetimebetweenkeypresses.Thesepatternsareuniquetoeachperson.Thus,the

3、keyboardcandeterminepeople'sidentities,andbyextension,whethertheyshouldbegivenaccesstothecomputerit'sconnectedto—regardlessofwhethersomeonegetsthepasswordright.Italsodoesn'trequireanewtypeoftechnologythatpeoplearen'talreadyfamiliarwith.Everybodyusesakeyboardandeverybodytypesdifferently.Inastudydesc

4、ribingthetechnology,theresearchershad100volunteerstypetheword“touch”fourtimesusingthesmartkeyboard.Datacollectedfromthedevicecouldbeusedtorecognizedifferentparticipantsbasedonhowtheytyped,withverylowerrorrates.Theresearcherssaythatthekeyboardshouldbeprettystraightforwardtocommercializeandismostlyma

5、deofinexpensive,plasticlikeparts.Theteamhopestomakeittomarketinthenearfuture.本文是一篇说明文。数据和身份盗窃变得越来越普遍，目前，像指纹扫描等技术仍然是昂贵的。本文介绍了一种新的科技——智能键盘，它能给espace用户带来安全，而且这项技术也不贵。1．Whydotheresearchersdevelopthesmartkeyboard?A．Toreducepressureonkeys.B．Toimproveaccuracyintyping.C．Toreplacethepasswordsystem.D．Tocutth

6、ecostofespaceprotection.解析：细节理解题。根据第一段的Atpresent,thesetechnologiesarestillexpensive,though.和第二段的ResearchersfromGeorgiaTechsaythattheyhavecomeupwithalowcostdevice(装置)thatgetsaroundthisproblem:asmartkeyboard.可知，研究者们开发智能键盘是为了降低espace的成本。故选D。答案：D2．Whatmakestheinventionofthesmartkeyboardpossible?A．Compu

7、tersaremucheasiertooperate.B．Fingerprintscanningtechniquesdevelopfast.C．Typingpatternsvaryfrompersontoperson.D．Datasecuritymeasuresareguaranteed.解析：细节理解题。根据第二段的Thekeyboardcouldofferastronglayerofsecuritybya