2022版高考英语一轮复习选修7Unit2Robots学案含解析新人教版.doc

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1、优选Unit2Robots————[单元主题语境]———人与社会之科技发展与信息技术创新，科学精神，信息安全(2019·高考全国卷Ⅰ)话题：智能键盘　词数：255　难度：★★★Asdataandidentitytheftbeesmoreandmoremon，themarketisgrowingforbiometric(生物测量)technologies—likefingerprintscans—tokeepothersoutofprivateespaces.Atpresent，thesetechnologiesarestillexpensive，tho

2、ugh.ResearchersfromGeorgiaTechsaythattheyhaveeupwithalowcostdevice(装置)thatgetsaroundthisproblem：asmartkeyboard.Thissmartkeyboardpreciselymeasuresthecadence(节奏)withwhichonetypesandthepressurefingersapplytoeachkey.Thekeyboardcouldofferastronglayerofsecuritybyanalyzingthingslikethe

3、forceofauser'stypingandthetimebetweenkeypresses.Thesepatternsareuniquetoeachperson.Thus，thekeyboardcandeterminepeople'sidentities，andbyextension，whethertheyshouldbegivenaccesstotheputerit'sconnectedto—regardlessofwhethersomeonegetsthepasswordright.Italsodoesn'trequireanewtypeoft

4、echnologythatpeoplearen'talreadyfamiliarwith.Everybodyusesakeyboardandeverybodytypesdifferently.Inastudydescribingthetechnology，theresearchershad100volunteerstypetheword“touch”fourtimesusingthesmartkeyboard.Datacollectedfromthedevicecouldbeusedtorecognizedifferentparticipantsbas

5、edonhowthey-18-/18优选typed，withverylowerrorrates.Theresearcherssaythatthekeyboardshouldbeprettystraightforwardtomercializeandismostlymadeofinexpensive，plasticlikeparts.Theteamhopestomakeittomarketinthenearfuture.[语篇解读]　本文是一篇科研报道。来自佐治亚理工学院的研究人员发明了一种智能键盘，可以通过分析用户的打字模式来判断该用户是不是安全访客。

6、28．Whydotheresearchersdevelopthesmartkeyboard?A．Toreducepressureonkeys.　B．Toimproveaccuracyintyping.C．Toreplacethepasswordsystem.D．Tocutthecostofespaceprotection.解析：推理判断题。根据第一段最后一句“Atpresent，thesetechnologiesarestillexpensive，though.”以及第二段第一句“ResearchersfromGeorgiaTechsaythatthe

7、yhaveeupwithalowcostdevicethatgetsaroundthisproblem:asmartkeyboard.”可推知，研究者研发这种智能键盘是为了降低网络安全保护技术的成本。注意题干、正确选项以及原文中一些词汇的多次呼应现象：develop与eupwith是同义词，expensive与lowcost是反义词，cutthecost与lowcost相呼应。答案：D29．Whatmakestheinventionofthesmartkeyboardpossible?A．putersaremucheasiertooperate.B．F

8、ingerprintscanningtechniquesdevelopfast.C．Typin