高考英语一轮选练编题unit2robots（含解析）新人教版选修

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1、Unit2考点规范练(选修7　Unit2)【短文语法填空】根据短文内容，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。IthasprovedtobethecaseinthelastfewdecadesthatEnglishwouldbethegloballanguage.However,learningEnglishasaforeignlanguageisverydifficultinthe1.absence(absent)ofanativelanguageenvironment.Some2.respected(respect)theo

2、riesonlanguageacquisitionbelievethattolearnaforeignlanguage,youneedto3.be__surrounded(surround)bysomenativespeakers.Sadly,mostoftheEnglishlearnerscannotliveinthenativecountry,4.whichmeanswecanonlydependonourschoolresources.Soteachershavetoguarantee5.anadequateamountofinputinEn

3、glish,whichcanbeconveyedtothestudentsthrough6.various(vary)mediums.Sinceextracurriculaworkmayacceleratelanguagelearning,herearesome7.suggestions(suggest)toEnglishlearners:listeningtoanEnglishsongseveraltimesinoneweekafter8.reading(read)thewords.Try9.to__adjust(adjust)thelangua

4、getoEnglishinpartsyouknowwellwhilewatchingafavouriteDVD.Studyingwithfriends.Rewardingyourself,includinginformingafriend10.ofyourtargetssotheycanhelpmotivateyouaswell.Ⅰ.阅读理解AEachyear,hikersandmountainbikersgetlostorinjuredinthewilderness.Searchandrescueeffortscaninvolve20ormore

5、people.Butanew“smart”drone(无人机)canfollowhikingtrails(小路)withoutapilot’sassistance.Thiscouldallowrescuerstosearchmoreefficiently.Scientistsoutfittedacraftwithasinglecamera.Asthedrone’s“eye”,thecamerapointedforwards.Buthavinganeyewasn’tenough.Thedronealsoneededa“brain”toundersta

6、ndwhatitwasseeing.Andthatbrainwouldhavetorecognizewhatconstitutesatrail.Cameraimages,however,canbeverydifficultforacomputertointerpret,studyleaderAlessandroGiustinotes.Soheandhisteamusedphotosofforesttrailstotraintheirdrone’sneuralnetwork(神经网络).TheyattachedthreeGoProcamerastoa

7、singleheadband.Onecamerapointedstraightforward.Theothertwoweredirected30degreestotherightandleftofthecentre.AhikerputthepackageonandthenhitthetrailsinaforestedpartofSwitzerland.Overseveralweeks,thecamerasrecordedatotalof8hoursofvideocovering7kilometresoftrails.Theresearchersth

8、endividedthevideointoindividualstillimagestotraintheneuralnet