四川省宜宾市一中2018-2019学年高三英语上学期第12周周练题AAssmartdevicescontinuetofillpeople’sdailylife,thedebateovertheirplaceintheclassroomhasgrownincreasingly.Now,astudyconductedattheUnitedStatesMilitaryAcademyjustmightputanendtoit.Inarecentinvestigation,researchersfoundthatstudentswhowerepermittedtouselaptopsortabletsintheclassroomperformedworsethanthosewhodidnot—andthosewithhigherinitialGPAs(平均成绩)weremostheavilyaffected.Whilesomearguethatlaptopsaidstudentsinnote-takingandcomprehension,manysaythattheycouldn’tpayattentiontothelessons.Togettothebottomoftheissue,researchersinvestigatedtheeffectoflaptopsandtabletsonstudentperformanceinacourseataschool.Inthestudy,theclasswasthendividedintotwotreatmentgroups.Thefirsttreatmentgroupwaspermittedtouselaptopsandtabletsforpurposesrelatingtotheirlesson.Ifthestudentswereobviouslydistracted,professorscouldstopthemfromusingthedevices.Inthesecondgroup,studentscouldonlyusetablets,makingthescreeneasilyvisibletotheprofessors.Whenitcametimeforfinalexamscores,theresearchersfoundthatusingalaptoportabletintheclassroomhadcausedadropofroughlyone-fifthofastandard.Theresultsforthetwotreatmentgroupswerenearlythesame,theysay.And,thenegativeeffectswereseenmostheavilyinmalestudents.Theestimatedeffectsofthetwotreatmentgroupsarenearlythesame,suggestingthatevenallowingstudentstousecomputerdevicesinamannerthatiscontrolledbytheprofessorcanhaveharmfuleffectsonclassroomperformance.Theresearcherssaythatbothunrestrictedandrestrictedusemayaffectstudentsinanumberofways.Itcouldleadtodistractions,inwhichstudentsarecheckingsocialmediaorevendoinghomeworkforanotherclass,anditmayreducestudents’abilitiestoeffectivelytakenotes.1.Theunderlinedword“it”inthefirstparagraphmayreferto______.A.thedeviceB.thedebateC.theclassroomD.thestudy2.Whosufferedfromtheuseofsmartdevicesmostinthestudy?A.ThemalestudentswithhigherGPAs.B.Thestudentswithpooracademicperformance.C.Thestudentswhocoulduselaptopsortabletsfreely.D.Themalestudentswhocoulduselaptopsortabletsundercontrol.3.Whatconclusiondidthestudydraw?A.Theprofessorshadnoeffectonstudents’scores.B.Thefirsttreatmentgrouphadariseofthescores.C.Thesecondtreatmentgroupdidbetterthanthefirst.D.Thetwotreatmentgroupsbothsawadropinthescores.4.Whatcanbeinferredfromthetext?A.Usinglaptopscouldhelpstudentsperformbetterinacourse.B.Thenegativeeffectsofcomputerdevicesdependedongender.C.Thedistractioncausedthedropofthestudents’scores.D.Restricteduseoflaptopsaidedstudentsintakingnotes.BAmachinethattakessweat-laden(浸满汗水的)clothesandturnsthesweatintodrinkingwaterisinuseinSweden.Themachinemakestheclothesturnroundquickly,heatsthemtoremovethesweat,andthenpassesthesteamthroughakindofspecialmaterialtomakepurifiedwaterThedevicewasbuiltfortheUnitedNations’child-focusedcharityUNICEFtopromoteacampaignhighlightingthefactthat780millionpeopleintheworldlackaccesstocleanwater.ThemachinewasdesignedandbuiltbytheengineerAndreasHammar,knownlocallyforhisappearancesonTVtechshow“Mekatronik”.HesaidthekeypartofthesweatmachinewasanewwaterpurificationpartdevelopedbyacompanynamedHVR.“Itusesatechniquecalledmembranedistillation(膜蒸馏),”hetoldtheBBC.“Weuseaspecialkindofmaterialthatonlyletssteamthroughbutkeepsbacteria,salts,clothingfibersandotherthingsout.TheyhavesomethingsimilartotheInternationalSpaceStation,butourmachineischeapertobuild.Theamountofwateritprodu...
