人教版高二英语必修第二册 Unit 1 单元测试卷（含答案） .pdf

人教版高二英语必修第二册Unit1单元测试卷（含答案）

（考试时间：90分钟满分：120分）

第一部分阅读理解（共两节，满分50分）

第一节（共15小题；每小题2.5分，满分37.5分）

读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

A

Asdataandidentitytheftbecomesmoreandmorecommon,themarketisgrowing

forbiometric（生物测量）technoogies一ikefingerprintscans一tokeepothersoutof

privatee-spaces.Atpresent,thesetechnoogiesarestiexpensive,though.

ResearchersfromGeorgiaTechsaythattheyhavecomeupwithaow-costdevice

（装置）thatgetsaroundthisprobem:asmartkeyboard.Thissmartkeyboardprecisey

measuresthecadence（节奏）withwhichonetypesandthepressurefingersappyto

eachkey.Thekeyboardcoudofferastrongayerofsecuritybyanayzingthingsike

theforceofauserstypingandthetimebetweenkeypresses.Thesepatternsare

uniquetoeachperson.Thus,thekeyboardcandeterminepeopesidentities,andby

extension,whethertheyshoudbegivenaccesstothecomputeritsconnectedto一

regardessofwhethersomeonegetsthepasswordright.

Itasodoesntrequireanewtypeoftechnoogythatpeopearentareadyfamiiar

with.Everybodyusesakeyboardandeverybodytypesdifferenty.

Inastudydescribingthetechnoogy,theresearchershad100vounteerstypethe

wordtouchfourtimesusingthesmartkeyboard.Datacoectedfromthedevice

coudbeusedtorecognizedifferentparticipantsbasedonhowtheytyped,withvery

owerrorrates.Theresearcherssaythatthekeyboardshoudbeprettystraightforward

tocommerciaizeandismostymadeofinexpensive,pastic-ikeparts.Theteam

hopestomakeittomarketinthenearfuture.

1.Whydotheresearchersdeveopthesmartkeyboard?

ATo.reducepressureonkeys.B.Toimproveaccuracyintyping.

C.Torepacethepasswordsystem.D.Tocutthecostofe-spaceprotection.

2.Whatmakestheinventionofthesmart