Unit1寒假提前练习 高中英语人教版必修第三册文档格式.docx
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Unit1寒假提前练习 高中英语人教版必修第三册文档格式.docx
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Microplasticsaretinybitsofplasticoftentoosmalltobeseen.Plasticdoesn'
tdecomposelikenaturalmaterials.Instead,itjustbreaksintosmallerandsmallerpieces.Nooneknowsexactlyhowmuchplasticisintheoceans.Sincetheseaissolargeandsodeep,itshardtogetagoodideaofhowmuchplasticitcontains.Butinrecentyears,scientistshavemadegreatereffortstogetamoreaccurateidea.
Somestudieshavesuggestedthatsince1950.about17millionmetrictons(公吨)ofplastichaveenteredtheAtlanticOcean.Scientistsbelievethattheplasticpreviouslyfoundonbeachesandonthesurfaceofthewaterisonlyabout1%ofalltheplasticintheoceans.ResearchersfromtheUnitedKingdom(UK)wanttofindoutwheretheother99%was.
Fortwomonthsin2016theresearcherstooksamplesat12differentlocationsintheAtlanticOceanfromtheUKtoSouthAmerica.Theycollectwatersamplesfromthreedifferentdepthsinthetop200meters.Byrunningthewaterthroughspecialfllters(过滤器),theywereabletocollectthemicroplastics,whichtheycouldviewandstudywithamicroscope.
Basedontheirmeasurments.theresearcherslearnedthatjustthetop200metersoftheAtlanticOceanholdsbetween12and21millionmetrictonsofplastics.ButtheAtlanticOceanisverydeep,andthescientistsonlycheckedthetop200meters.TheysaythatifmicroplasticsarespreadthroughtherestoftheAtlanticliketheywereinthetop200meters,thintherearcprobablyabout200millionmetrictonsofmicroplasticsintheAtlanticOcean.
ThoughthescientistsonlystudiedtheAtlanticoceantheresultssuggestthattheremaybefarmoremicroplasticinalloceansthanwerealized.Theproblemsgofarbeyondoceanpollution.MicroplasticparticleshavebeenfoundjustineverywherearoundtheworldfromAntarcticatothebottomofthesea.
Scientistpredictthattheamountofplasticenteringouroceansislikelytotripletoverthenext20years.Havingagoodideaofhowmuchplasticisalreadythenmightbeagoodfirststeptofightingtheproblem.
5.Whatdocstheunderlinedword“decompose”inParagraph1mean?
A.turnupB.breakdownC.giveoffD.bringout
6.Whatisthelatestideaabouttheplasticintheseas?
A.Previousdataofplasticconsistsofonlyaverysmallpart.
B.Thereisonly17millionmetrictonofplasticontheearth.
C.Theamountofplasticintheseasisonthedecreaseinrecentyears.
D.Theamountofplasticintheseasisincreasingby1%yearly.
7.Whatistheauthor’sattitudeaccordingtothetext?
A.Pessimistic.B.Confident.C.Objective.D.Conserved.
8.Whatdoestheauthorexpecttotakeplace?
A.Morepollutantswillturnoutinthefuture.B.Measureswillbetakentodealwithplastic.
C.Theoceanswillbecleanedinthefuture.D.Morepeoplewillbeawareofplasticpollution.
二.七选五
Whileitmayseemlikeeveryonesurfsthewebthesedays,thereisfinelinebetweencasuallycheckingyoursocialmediapagesandhavingafullblownInternetaddiction.IfyoufearthatyoumayloseinterestinotheraspectsofyourlifebecauseyouprefertobeontheInternet,youmaybeonyourwaytoanInternetaddiction.___1__
Admityouareatriskofanaddiction.
MoreandmorepeopleintheworldarebecomingaddictedtotheInternet.Youarenottheonlyonewiththisproblem;
itisbecomingmoreandmorecommonandmoreandmorewellknown.___2___.
Setasidelimitedtimeforcomputeruse.
Makesurenottoturnitontoomanytimesaweek.Ifyouhavealaptop,makesuretoputitsomewherethatyoucanrememberbutnotsomewherethatyouseeeveryday.Trykeepingthelidclosedwhenyouarenotusingit;
___3___IfyouhaveadesktopPC,trynottogonearitorputsomethingoveritlikeasheet.
Callpeopleinsteadofsendinginstantmessagesortexts.
Ifyouarefreeonweekends,callfriendsandaskthemtogooutside.Thiswilldistractyoufromthecomputer.___4___
Useanalarmclockortimer.
Beforeusingyourcomputer,decideonatimelimitsuchas30minutes.Settheclockortimerandmakesurethatyougetoffthecomputerwhenthetimeisup.Alternativelycreateashutdowntimeronyourdesktop.___5___.
A.Makeasmalllistofwhatyouwanttodowithinthattime.
B.Whenthecomputerisnotlookingatyouyouarelesslikelytouseit.
C.Thiscanbeprogrammedtoshutdownyourcomputerafterthesettime
D.Luckily,therearewaystoavoidlivingyourlifeinfrontofthecomputer.
E.ThiswillstopyoufromusingtheInternetsooftenorgoingontoanotherpage.
F.Ifyouhaveaproblemonweekdays,phoneyourfriendsoraskforhelpinperson.
G.Donotbeembarrassed;
findotherswiththesameproblemandhelpeachotherbeatit.
三.语法填空
Asyouknow,scienceplays____1____veryimportantroleinoureducation.Doyouwanttok
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