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若复数z满足(i﹣1)z=4﹣2i(i为虚数单位),则=( )
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高三下学期数学《》真题及答案
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若复数z满足z=i2+zi为虚数单位则z=__________.
已知i是虚数单位若复数z满足zi=1+i则z²=
)-2i (
)2i (
)-2 (
)2
若复数z满足1﹣2i•z=3+ii为虚数单位则z=|z|=.
已知i是虚数单位若复数z满足1+iz=2i则z的虚部是
1
﹣1
﹣i
i
已知复数z满足i﹣1z﹣i3=2ii为虚数单位则z的共轭复数为
i﹣1
1+2i
1﹣i
1﹣2i
在复平面内若复数z满足z-2i=4+ii为虚数单位则复数z的模为.【
若复数z满足zi﹣1=4﹣2ii为虚数单位则复数z的共轭复数是
﹣3﹣i
﹣3+i
若复数z满足2z+=3﹣2i其中i为虚数单位则z=
1+2i
1﹣2i
﹣1+2i
﹣1﹣2i
若复数z满足1+iz=2i为虚数单位则z=.
若复数z满足1+2iz=-3+4ii是虚数单位则z=________.
设i是虚数单位若复数z满足1+iz=2i则z=
-1+i
1-i
1+i
-1-i
若复数zl=-1+2iz2=-1-i其中i是虚数单位则zl+z2i的虚部为
-2i
-2
2i
2
若复数z满足2z+=3﹣2i其中i为虚数单位则z=
1+2i
1﹣2i
﹣1+2i
﹣1﹣2i
若复数z满足2z+=3﹣2i其中i为虚数单位则z=
1+2i
1﹣2i
﹣1+2i
﹣1﹣2i
设复数z满足=|1﹣i|+ii为虚数单位则复数z为
﹣i
+i
1
﹣1﹣2i
设复数z满足z1+i=2+4i其中i为虚数单位则复数z的共轭复数为__________.
5.00分若复数z满足1+iz=2ii为虚数单位则z=
1+i
1﹣i
﹣1+i
﹣1﹣i
5.00分已知复数z满足z1+i=2ii为虚数单位则复数z的共轭复数为
1+i
1﹣i
﹣1+i
﹣1﹣i
若复数z满足z1-i=2ii是虚数单位是z的共轭复数则z·=.
若复数z满足2z+=3﹣2i其中i为虚数单位则z=
1+2i
1﹣2i
﹣1+2i
﹣1﹣2i
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AuthorWalterDeanMyersdiedattheageof76afterabriefillness.WalterDeanMyerswastheauthorofmorethan100booksforchildrenandyoungadultsandreceivedmanytopawards. TheprolificauthorwaslovedforhisvividdescriptionofthelivesofAfricanAmericanchildrenandforwritingbooksforyoungpeoplethatcovereddifficultsubjectslikewarandviolence.Drugsdrive﹣byshootingswastedlives﹣Myershaswrittenaboutallthesesubjectswithdeepunderstandingandahard﹣wonqualifiedsenseofhopesaidLeonardS.Marcusin2008. Hewasbornin1937andwasadoptedbyFlorenceDeanandHerbertafterhismotherdiedwhenhewas18monthsoldTheylovedhimverymuchandhismotherreadtohimfromaveryyoungageReadingpushedhimtodiscoverworldsbeyondhislandscape. Hebeganwritingatanearlyage.HewrotewellinhighschoolandanEnglishteacherrecognizedthisandadvisedhimtokeeponwritingnomatterwhathappenedtohim.It'swhatyoudoshesaid. Hedroppedoutofhighschoolat17andjoinedthearmy.Afterfinishinghisserviceheenteredadarkperiodinhislife.Myersbeganwritingatnighttopullhimselfthroughthatmiserabletime. InaNewYorkTimesessaypublishedearlierthisyearMyersdescribedhowashortstorybyJamesBaldwinhelpedchangethecourseofhislife.Ididn'tlovethestorybutIwasliftedbyithewroteforittookplaceinHarlemanditwasastoryconcernedwithblackpeoplelikethoseIknew.Byhumanizingthepeoplewhowerelikeme.Baldwin'sstoryalsohumanizedme.ThestorygavemeapermissionthatIdidn'tknowIneededthepermissiontowriteaboutmyownlandscapemyownmap. IwritebooksorthetroubledboyIoncewashewroteandfortheboywholiveswithinmestill. 1Whatdoesthesecondparagraphmainlytalkabout? A.HowpopularMyerswas B.HowMyersbecamesuccessful. C.WhatmakesMyers'workspopular. D.WhatpeoplethinkofMyers'works. 2WhodiscoveredMyers'writingtalent? A.JamesBaldwin B.Hismother. C.LeonardS.Marcus. D.Oneofhisteachers. 3WhatdoestheunderlinedwordprolificinParagraph2probablymean? A.Productive. B.Unfortunate. C.Conservative. D.Humorous. 4WhywastheshortstorybyJamesBaldwinsoimportantforMyers? A.Ithelpedhimsurvivethedarkperiod. B.Itinspiredhimtopursuehiswritingcareer. C.Helearnedmanywritingtechniquesfromit. D.Theauthorofthestorypermittedhimtowrite.
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ThesmalltownofRjukaninNorwayissituatedbetweenseveralmountainsanddoesnotgetdirectsunlightfromlateSeptembertomid﹣March﹣1sixmonthsoutoftheyear. Ofcoursewe2itwhenthesunisshiningsaysKarinRowhoworksforthetown'stourismoffice.Weseetheskyis3butdowninthevalleyit'sdarker﹣it'slikeona4day. Butthat5whenasystemofhigh﹣tech6wasintroducedtoreflectsunlightfromneighboringpeaks山峰intothevalleybelow.Wednesdayresidents居民ofRjukan7theirveryfirstrayofwintersunshineArowofreflectiveboardsonanearbymountainsidewereputto8.Themirrorsarecontrolledbyacomputerthat9themtoturnalongwiththesunthroughoutthe10andtocloseduringwindyweather.Theyreflectaconcentratedbeam束oflightontothetown'scentral11creatinganareaofsunlightroughly600squaremeters.Whenthelight12Rjukanresidentsgatheredtogether. Peoplehavebeen13thereandstandingthereandtaking14ofeachotherRosays.Thetownsquarewastotally15.Ithinkalmostallthepeopleinthetownwerethere.The3500residentscannotall16thesunshineatthesametime.17thenewlightfeelslikemorethanenoughforthetown's18residents. It'snotvery19shesaysbutitisenoughwhenweare20. 1A.only B.obviously C.nearly D.precisely 2A.fear B.believe C.hear D.notice 3A.empty B.blue C.high D.wide 4A.cloudy B.normal C.different D.warm 5A.helped B.changed C.happened D.mattered 6A.computers B.telescopes C.mirrors D.cameras 7A.remembered B.forecasted C.received D.imagined 8A.repair B.risk C.rest D.use 9A.forbids B.directs C.predicts D.follows 10A.day B.night C.month D.year 11A.library B.hall C.square D.street 12A.appeared B.returned C.faded D.stopped 13A.driving B.hiding C.camping D.sitting 14A.pictures B.notes C.care D.hold 15A.new B.full C.flat D.silent 16A.block B.avoid C.enjoy D.store 17A.Instead B.However C.Gradually D.Similarly 18A.nature﹣loving B.energy﹣saving C.weather﹣beaten D.sun﹣starved 19A.big B.clear C.cold D.easy 20A.trying B.waiting C.watching D.sharing
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假定你是李华你的美国朋友Tony在你校做交换生希望你教他做饺子你写邮件告诉他你的安排.内容包括 1确定时间和地点一起买原材料 2回你家做饺子 3看网络视频预先学习 4吃饺子. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯. DearTony Yours LiHua.
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及修改均仅限一词. 2.只允许修改10处多者从第11处起不计分. Lastyear.myfriendandlwenttovisittheYellowMountainWecarriedtwobackpacksthatturnedouttobeprettyheavierforthehike.IamnotanexperiencinghikerandthoseendlessstepsmakemewanttoreturntothesafeandcomfortablegrouncLButmyfriendencouragedmegreat.Lookthetopiscomingcloserandcloser.Wearealmostthere.Ipulledmetogetherandkeptgoing.Afterthree﹣hourexhaustinghiketothetopbutwithwonderfulsceneriesonthewaywegottothetopfinally.Forourpleasurewealsofoundahotelthatlookedverymuchinviting.
TheFiveBestCountriesTOMoveToForRetirement Retiringinadifferentcountryisgamingpopularity.Belowarefiveofthebestcountriestoseekretirement CostaRica Mildclimatebreathtakinglandscapesandbeachesdrawretirees退休人员toCostaRica.Thecountryreadilywelcomesimmigrantsandoffersasimpleresidencyprocess.Withamonthlyincomeofatleast﹩1000permonthfromSocialSecurityorasimilarsourcepeopleenjoyahighstandardoflivingatamuchlowercostthantheU.S. Malaysia RetireeswhochoosetomakeMalaysiahomewillappreciateitsrichcultureandattractivescenery.Moreoverthecountryoffersmodernfacilitiesatmodestprices.Immigrantsenjoyconvenienceandcomfortintheirdailylife.Youwillfindlow﹣costrentalunitsdeliciousstreetfoodandvariousshoppingmalls. Mexico Becauseit'sclosetotheU.S.MexicodrawsmorethanamillionAmericanretireestoitsborders.Increasingimmigrantcommunitiesenjoyseasidelivingandconversationswithfriendly.Englishspeakinglocals.Pluslegalresidentsovertheageof60receiveairlinegroceryandrestaurantdiscounts. Panama Gentleoceanwindtakestheheatoutofhotyear﹣roundtemperatureswhichhasbeenthechiefattractiontoforeignretirees.BeautifulbeachesandaboomingeconomyalsoattractretireestoPanama.Anincomeof﹩2000permonthcoversmodestlivingcosts.Furthermorethecountryoffersdiscountstoretireeswithaspecialvisa. Ecuador Lazycoastaltownssun﹣shininghotspotsandnature﹣filledviewswaitforimmigrantsseekingacarefreelifestyle.PublictransportationcostsinEcuadormakeowningavehicleunnecessary.Abusrideonlycosts25centsandtaxirideswillrunabout﹩3. 1WhatdoCostaRicaandMalaysiahaveincommon? A.Convenientshopping. B.Relativelylowlivingcost. C.Variousculturalactivities. D.Simpleimmigrationprocedures. 2Whichcountry'slocationspeciallyattractsretireesfromtheU.S.? A.Malaysia's. B.Ecuador's. C.Panama's. D.Mexico's. 3WhatisthemainreasonforretireestochoosePanama'? A.Beautifulbeaches. B.Aboomingeconomy. C.Apleasantclimate. D.Discountsforretirees.
Marmosetmonkeysexistonabranchoftheevolutionarythreethatisdistinctfromtheonethatledtohumans.Buttheyconstantlyastonishresearcherswith1behaviorthatseemsprettyhighlyevolved.Theirsocialorganizationand2practicescouldhavebeenthemodelforthephraseIttakesavillage.Adominantmaleandfemalebreedandtheirbabiesarecarefullylookedafterbyextendedfamilymemberswhothenaren'tfreetobreedthemselves. Anewstudyfurther3themarmoset'sreputationforadmirablecommunityvalues.Researchersreportthatthesecaregiverssharetheirfoodmoregenerouslywithlittleones4thanwhenthey'resurroundedbythewatchfuleyesofothercommunitymembers.Incomplexsocietieswhereindividualsbandtogetherfor5protectionresearchershavecomeupwithafewwidelyacceptedexplanationsforselflessbehavior.Butspecificactslikesharingadeliciouscricket蟋蟀withabeggingbabymarmosetseemtoneedmore6explanation. Onepossibilityisthatanindividualpractices7asameansofenhancinghisstatusamongpeers.By8thatheissowellgiftedwithmaterialgoodsthathecangivesomeawaythisdo﹣gooderenhanceshispowerwithinthegroup.Thatinturnmay9prospectivemates.Theotherexplanationforcharitablebehavior10thatkindnessesextendedtoothersaresimplythefeesofgroupmembershipwhichofferssomefuturepromiseofachancetomate.Failuretosharewouldresultinexclusionfromthegroupandalossof11partners.Scientistscallthisthepaytostaymodel.Importantlyforbothofthesemodelstoworkactsofkindnessmusthavean12.Thatsuggestsyouwouldseemoresharingingroupsettingsawayfromjudgingeyesacaregivermightbemorelikelytokeepfoodforhimselforherself.Andyetin2581testsconductedwith31adultand14babymarmosetsthe13appearedtobetrue. Anthropologists人类学家fromtheUniversityofZurichcarefullydocumentedhowofteningroupsandinconditionsthatfoundcaregiverandbabyseparatedfromthecrowdanadultwouldsharehisorhercricket.Whenalonewithababybeggingforatasteadultmarmosetssharedtheircricket85%ofthetime.Wheninagroupcaregiversoffereduptheircricket67%ofthetime.Ourresultsshowthathelpingincommonmarmosetsisnotdrivenbyreputationmanagementor14avoidancethestudyauthorreported.Ratheritisdrivenbyadeep﹣downmotivationtohelpthatismore15expressedwhenindividualsarealonewithyoung. 1A.animal B.careful C.social D.individual 2A.evolving B.communicating C.organizing D.parenting 3A.shines B.damages C.affects D.protects 4A.atplay B.inprivate C.onschedule D.byaccident 5A.adequate B.effective C.continual D.mutual 6A.creative B.complex C.specific D.official 7A.generosity B.wisdom C.independence D.governance 8A.promising B.demonstrating C.pretending D.explaining 9A.counton B.goafter C.appealto D.benefitfrom 10A.assumes B.confirms C.enhances D.concludes 11A.regular B.dominant C.potential D.previous 12A.atmosphere B.audience C.feedback D.judge 13A.statistics B.expectations C.argument D.opposite 14A.responsibility B.punishment C.arrangement D.difficulty 15A.strongly B.casually C.delicately D.fearlessly
Imagineacatthatdoesnotneedsomeonetocleanupafteritkeepsanolderpersoncompanyandhelpsthemremembertotaketheirmedicine.ThatistheshareddreamofthetoymakerHasbroandscientistsatBrownUniversityinProvidenceRhodeIsland.Theresearchersreceiveda﹩3﹣million﹣dollarawardfromtheNationalScienceFoundationforaspecialproject.TheywanttofindwaystoaddartificialintelligenceorA.I.toHasbro'sJoyforAllrobotic. Thecathasalreadybeenforsalefortwoyears.Thoughpricedover1000dollarsitsoldquitewell.Itwasmeanttoactasacompanionforolderpeople.Nowtheprojectisaimedatdevelopingadditionalabilitiesforthecat.ResearchersatBrown'sHumanity﹣CenteredRoboticsInitiativeareworkingtodecidewhichactivitiesolderadultsmayneedthemost.Theyhopetomakethecatperformasmallnumberofactivitiesverywell.Suchactivitiesincludefindinglostobjectsandremindingthepersontotakemedicineorvisittheirdoctor.Theyalsowanttokeepthecostdowntojustafewhundreddollars. ItisanideathathasappealedtoJeanneElliott.Her93﹣year﹣oldmotherMaryDerrliveswithherinSouthKingstown.Derrhasdementia痴呆.TheJoyforAllcatthatElliottboughtthisyearhasbecomeatruecompanionforDerr.ThecatstayswithDerrandkeepshercalmwhileElliottisatwork.Elliottsaidaroboticcatthathelpshermothertoremembertotakehermedicineandbecarefulwhenshewalkswouldbegreater. Theresearchersaretryingtolearnhowtheimprovedcatswillcompletehelpfulactivitiesandhowtheywillcommunicate.Theysaythattheydonotwantatalkingcathowever.Insteadtheyaretryingtodesignacatthatcanmoveitsheadinaspecialwaytosuccessfullycommunicateitsmessage.Intheendtheyhopetocreateanexchangebetweenthehumanandthecatinwhichthehumanfeelsthecatneedsthem.Bydoingsotheresearchershopetheycanevenhelppreventfeelingsoflonelinessandsadnessamongelderlypeople. 1What'sthepurposeoftheproject? A.Torelievethepainoftheelderly. B.Topromotethesalesofamedicine. C.Toinventaroboticcatfortheelderly. D.Tohelpmaketheroboticcatsmarter. 2Comparedwiththeoldmodelthenewroboticcatwillbe. A.smaller B.cheaper C.moretalkative D.moreexpensive 3WhatdoesParagraph3intendtotellus? A.Thecatgivesmuchhelptotheelderly. B.Themorefunctionsofthecatthebetter. C.Thereisnocurefordementiaatpresent. D.MaryDerrwouldhavediedwithoutthecat. 4Whatcanweinferfromthelastparagraph? A.Atalkingcatisquitepopularamongtheelderly. B.Feelingsofsadnessamongtheelderlyareunavoidable. C.Eachfamilycanaffordsuchacatinthefuture. D.Thefeelingofbeingneededisvitaltotheelderly.
Abandonedaround900yearsagosoonafteritsdecorationstartedTaKeohasbeenrevivedbyChineseandCambodianexperts. TheAngkorcomplexspreadsoveranareaof400squarekilometers.ItwasinscribedontheWorldHeritageListin1992.HoweverduetoheavyrainsstealingandlackofprotectionforcenturiesmosttemplesofAngkorwereseriouslydamaged. InordertobetterprotectandconservethesepearlsofhumancivilizationChinajoinedICC﹣AngkoraninternationalcampaignlaunchedbyCambodiaandUNESCOin1993.FromChausayTevadatoTaKeotheChineseteamhasearnedtrustandestablishedagoodreputation. ItsunfinishedstatusshowstheconstructionproceduresoftemplesinAngkor.ThisgivesTaKeoirreplaceablevalueinthestudyofAngkor'sarchitecturesaidJinZhaoyuanengineerfromtheCACH中国文化遗产研究院. Suchuniquenesshoweverpresentedgreaterchallenges.ComparedwithChausayTevadaitcoversalargerareaandhasmorerisksincludingunsteadystonestructuresapoordrainagesystemandfallenkeyparts. BecausetheconstructionisunfinishedmanyfallenpartsarenotcarvedleavinglittleinformationofitsrelationswithotherpartssaidJin. JinshowedarchivesofthosefallenpartseachwithitsIDfilepictureanddimensions.EverystoneisuniquelfonestoneisinthewrongpositionthegapwillgrowwiderasyourestoreitandanaccuraterestorationwillbeimpossiblesaidJinSimplyspeakingourprioritiesare'searching'and'matching'.Findingthefallenpartsandputtingthembackperfectly. Tobetterunderstandthetemple'sstructureandpreciselyrestoreittheteamappliedthemostadvancedtechnologiesincluding3DlaserscanningandmappingstructuralresearchanddronerecordingtobuildacompletedigitalmodelofTaKeo. Jindemonstratedthe3Dmodelsystemwithwhichtheyrestoredthetemplehundredsoftimes.IcanmeasurethedimensionsofeverystoneandeverygapincomputerandsearchtherightstonethatcanfitinthegapJinsaid. Thisismucheasiersaidthandone.DozensofChineseexpertsfromvariousfieldsworkedtogetherwithCambodiancolleaguestoovercomeastringofobstacles.IttookthemeightyearstorestoreTaKeo. 1WhatcanwelearnabouttheAngkorcomplexfromthetext? A.Itwasabandonedbeforeitwasfinished B.Ithasthelargestsizeofitskindworldwide. C.Itisinpoorconditionduetovariousreasons D.Itssignificancehasbeenignoredforalongtime. 2WhyisTaKeosoimportantinthefieldofarchitecture? A.Itcoversaverylargearea. B.Ittellshowthetemplewasbuilt. C.Ithasahistoryofmorethan900years D.ItwasontheWorldHeritageList. 3WhatwasthebiggestchallengetheChineseteamfacedwhilerestoringTaKeo? A.SeriousdamageithadsufferecL B.Buildingthe3Dmodelsystem. C.Co﹣operationwithCambodiancolleagues D.Knowinglittleaboutitsstructure 4Whatisthebesttitleforthetext? A.Hi﹣techAppliedtoRestoreTaKeo. B.ProtectingPearlsofHumanCivilization. C.InternationalCo﹣operationandRestoration. D.China'sRoleinRestoringCambodianHeritage.
It'sabout250milesfromthehillsofwest﹣centralIowatoEhlers'homeinMinnesota.DuringthelongtriphomefollowingaweekendofhuntingEhlers1aboutthesmalldoghehadseen2alongsidetheroad.Hehad3tocoax哄thedogtohimbutfrightenedithad4. BackhomeEhlerswastroubledbythat5dog.SofourdayslaterhecalledhisfriendGregandthetwodrove6.Afteralongandcareful7Gregsawacrossafieldthedogmoving8away.Ehlerseventuallysucceededincoaxingtheanimaltohim.Nervousnessandfearwerereplacedwith9.Itjuststartedlicking舔Ehlers'face. Alocalfarmertoldthemthedogsoundedlikeone10aslostinthelocalpaper.Theadhada11numberforatowninsouthernMichigan.Ehlers12thenumberofJeffandLisatotellthemhehad13theirdog. Jeffhad14inIowabeforeThanksgivingwithhisdogRosiebutthegunshotshadscaredthedogoff.Jeffsearched15forRosieinthenextfourdays. EhlersreturnedtoMinnesotaandthendrove100milestoMinneapolistoputRosieonaflighttoMichigan.It'sgoodtoknowthere'sstillsomeoneouttherewho16enoughtogotothatkindof17saysLisaofEhlers'rescue18. Ifiguredwhoeverlostthedogwasprobablyjustas19toitasIamtomydogssaysEhlers.IfithadbeenmydogI'dhopethatsomebodywouldbe20togothatextramile. 1A.read B.forgot C.thought D.heard 2A.fighting B.trembling C.eating D.sleeping 3A.tried B.agreed C.promised D.regretted 4A.calmeddow B.stoodup C.rolledover D.runoff 5A.injured B.stolen C.lost D.rescued 6A.home B.past C.back D.on 7A.preparation B.explanation C.test D.search 8A.cautiously B.casually C.skillfully D.angrily 9A.surprise B.joy C.hesitation D.anxiety 10A.predicted B.advertised C.believed D.recorded 11A.house B.phone C.street D.car 12A.called B.copied C.counted D.remembered 13A.fed B.adopted C.found D.cured 14A.hunted B.skied C.lived D.worked 15A.onpurpose B.ontime C.inturn D.invain 16A.cares B.sees C.suffers D.learns 17A.place B.trouble C.waste D.extreme 18A.service B.plan C.effort D.team 19A.equal B.allergic C.grateful D.close 20A.suitable B.proud C.wise D.willing
ManycosplayactivitiesarebeingorganizedinChinamakingthesubculturepopularamongsomeyouths.Cosplaymeanscostumeplayinwhichparticipantswearcostumesandfashionaccessories配饰torepresentaspecificcharacter.What'sthereasonwhyyouthsareinterestedincosplay?1Cosplayparticipantsofteninteractwitheachothertodressupascharactersfromanimes动漫cartoonscomicbooksfilmsTVprogramsandvideogames.Youthswholovecosplayhavetheirownsetsofjokeswhichoutsidersrarelyunderstand.2 Cosplayersarealmostalwaysyoungmostofthemunder25andastheygrowoldertheytendtogiveupthepractice.3Insteadtheyshouldtreatsuchyoungstersasnormalyouthsbutatthesametimewarnthemnevertocrossthesocialandmoralboundaries. Thecosplaysubcultureisakindofperformingarts.Cosplayersusuallygetthecostumesintheseways.Firstthroughsomecompaniesthatmakeandsellpackagedsuitsforcosplay.Secondthroughsomeindividualsthatmakecostumesandaccessories.4 WithcapitalflowingintotheAGC二次元industrymorespecificandmaturebusinessmodelshelptheindustrydevelopfurther.5Sincethenthedomesticanimationandgameindustryhasbeendevelopinghealthilywithastrongersenseofusinglegalproducts.China'sACGindustryislikelytoseehighergrowthin2019. A.Andbesidesbymakingthemthemselves. B.It'sawayforyouthstoexpressvirtual虚拟的love. C.Perhapsthat'swhypeopleareprejudicedagainstthem. D.Basedonaresearch2015provedtobeaturningpoint. E.Thecosplayindustryisexpectedtowitnessmoresuccess. F.Thereforethereisnoneedforparentstooverreacttocosplay. G.Soregulatorsshouldstrictlymonitorsucheventstopreventimproperbehaviors.
Biggerisn'talwaysbetter.Peoplewhoareskepticalaboutthisargumentjustneedtolookatpersonalcomputers.Itisthecontinualshrinkageofcomponentsthathavebroughtabouttheexplosionofcomputingpowerandenabledthesecomputerstobeaccessibletopeopleacrosstheworld. Inspiredbythisresearchershavebeenworkingonareaswheremakingthingssmallmaymeanbigresults.AndthisyeartheNobelPrizehaschallengedtheconventionofcelebratingbigbypresentingthebiggestprizestodiscoveriesonthesmallestscales. ThecommitteepresentedtheNobelPrizeformedicinetoYoshinoriOhsumioftheTokyoInstituteofTechnologyforhisresearchonautophagywhichisaself﹣eatingprocessseenincells. What'smoreinrecognitionoftheirworkingontheuniquenatureofmatterinextremestatesandtakingtheirresearchallthewaydowntoanatomicscaletheNobelPrizeforphysicswasawardedtothreeBritish﹣bornscientistswhopresentlyworkintheUS. Anotherexceptionalnewfieldisthatofnanotechnology纳米技术.TheNobelprizeforchemistrywasawardedtoascientistwhomanagedtobuildtheworld'stiniestmachinesoutofmolecules分子includinganano﹣sizedcarwhicharesosmallthattheyarenotseenbythehumaneye. Smallasthesubjectsarethebenefitsofthescientists'researcharesettobehuge.Moreimportantlytheirinventionsmayeveneventuallybeturnedintoproductsthatbenefitmankind. Ohsumi'sresearchonautophagyshinesalightoncommondiseasessuchaParkinson'sanddiabetes.Asforthemolecularmotorsthey'repreparingtobringhugepotentialtothefieldsofmedicineandenergy.Theground﹣breakingdiscoveriesinphysicshavelightedafirestormofresearchandit'sonlyamatteroftimebeforetheirresearchleadstoadvancesasunimaginabletousnowascomputerchipswereahundredyearsagoLauraH.Greenepresident﹣electoftheAmericanphysicalsocietytoldTheNewYorkTimes. 1Theunderlinedwordshrinkageinparagraph1probablymeans. A.cuttingdownthecost B.strengtheningthefunction C.improvingthequality D.reducingthesize 2Whatcanbeinferredfromthepassage? A.Nano﹣sizedcarsarenowpopularallovertheworld. B.TheNobelPrizeusedtohaveapreferenceforfindingsonbigscales. C.Threescientistshavemadeagreatbreakthroughinatomicenergy. D.Ohsumi'sresearchhashelpedcuresomecommondiseases. 3WhatisLauraH.Greene'sattitudetothenewdiscoveriesinphysics? A.Doubtful. B.Positive. C.Reserved. D.Concerned. 4Whatisthemessagethepassageconveys? A.Smallthingsmakeabigdifference. B.Greatmindsthinkalike. C.Manysmallstreamsmakeagreatriver. D.Ajourneyofathousandmilesbeginswithasinglestep.
Bacteriaareanannoyingproblemforastronauts.Themicroorganisms微生物fromourbodiesgrowuncontrollablyonsurfacesoftheInternationalSpaceStationsoastronautsspendhourscleaningthemupeachweek.HowisNASAovercomingthisverytinybigproblem?It'sturningtoabunchofhighschoolkids.Butnotjustanykids.ItisdependingonNASAHUNCHhighschoolclassroomsliketheonescienceteachersGeneGordonandDonnaHimmelbergleadatFairportHighSchoolinFairportNewYork. HUNCHisdesignedtoconnecthighschoolclassroomswithNASAengineers.ForthepasttwoyearsGordon'sstudentshavebeenstudyingwaystokillbacteriainzerogravityandtheythinkthey'reclosetoasolution解决方案.Wedon'tgivethestudentsanybreaks.TheyhavetodoitjustlikeNASAengineerssaysFlorenceGoldaprojectmanager. TherearenotestsGordonsays.Thereisnogradedhomework.Therealmostarenogradesotherthan‘Areyouworkingtowardsyourgoal?'Basicallyit's‘I'vegottoproducethisproductandthenattheendoftheyearpresentittoNASA.'Engineerscomeandreallydoanin﹣personreviewand…it'snotaverynicethingattimes.It'sahardbusinessreviewofyourproduct. GordonsaystheHUNCHprogramhasanimpact影响oncollegeadmissionsandpracticallifeskills.ThesekidsaresoabsorbedintheirstudiesthatIjustsitback.Idon'tteach.Andthatannoyingbacteria?GordonsayshisstudentsareemailingdailywithNASAengineersabouttheproblemreadyingaworkablesolutiontotestinspace. 1WhatdoweknowaboutthebacteriaintheInternationalSpaceStation? A.Theyarehardtogetridof. B.Theyleadtoairpollution. C.Theyappearindifferentforms. D.Theydamagetheinstruments. 2WhatisthepurposeoftheHUNCHprogram? A.Tostrengthenteacher﹣studentrelationships. B.Tosharpenstudents'communicationskills. C.Toallowstudentstoexperiencezerogravity. D.Tolinkspacetechnologywithschooleducation. 3WhatdotheNASAengineersdoforthestudentsintheprogram? A.Checktheirproduct. B.Guideprojectdesigns. C.Adjustworkschedules. D.Gradetheirhomework. 4Whatisthebesttitleforthetext? A.NASATheHomeofAstronauts B.SpaceTheFinalHomeworkFrontier C.NatureAnOutdoorClassroom D.HUNCHACollegeAdmissionReform
TheTEDspeakerseriesfeaturesideasworthspreading.Withover1400tochoosefromwe'veselectedafewthatareperfectforstudents. 1.LarrySmithWhyyouwillfailtohaveagreatcareer Wehumansmayhaveanunfavorablehabitofmakingexcusesforourselvesoforbeingtooconfidentaboutourselves.AccordinglyLarrySmithaprofessorofeconomicsattheUniversityofWaterlooinCanadatellsuswhymostofuswillfailtohaveagreatcareer.Luckilyasheputsitthereisawayout﹣followyourheartaslongasitisgoodforyourcareer. 2.AndyPuddicombeAllittakesis10mindfulminutes Betweendanceteamvolunteeringand﹣ohright﹣lecturesyourlife'scrazyfactor因素isabouttogowayup.InthisentertainingandinformativetalkMindfulnessexpertAndyPuddicombeteachesushowtobemorehealthymoremindfulandlessdistractedbytakingjust10minutesoutofthedaytobemorepresent. 3.ShaneKoyczanTothisday…forthebullied欺凌andbeautiful Thistalkissuretostaywithyou.ShaneKoyczan'sToThisDayisanaffectingspoken﹣wordpoemaboutbullyingandbeingdifferentthatgainedover10millionviewsonYouTube.InthistalkKoyczangivesalivereadingofthepoemalongwithsomestoriesabouthisbackground. 4.SusanCainThepowerofintroverts性格内向者 DoesacupofteaandagoodbooksoundlikeaperfectFridaynight?InthispersonaltalkSusanCainarguesthatintrovertshavetalentsandabilities.Ourculturemayvaluebeingoutgoingbuttheworldneedsallkinds. 1WhatdoesLarrySmithadvisestudentstodoforagoodcareer? A.Don'tbetoooptimistic. B.Learnfromothers'lessons. C.Nevermakeexcusesforyourself. D.Matchyourinterestswithyourcareer. 2WhatisAndyPuddicombe'stalkmainlyabout? A.Howtoconcentrate. B.Theneedforteamwork. C.Howtobeagoodvolunteer. D.Theimportanceofgoodhealth. 3WhichTEDspeakermakespeoplewhoarenotsocialfeelconfident? A.AndyPuddicombe B.SusanCain C.ShaneKoyczan D.LarrySmith
Peoplearebeinglured引诱ontoFacebookwiththepromiseofafunfreeservice1realizingthatthey'repayingforitbygivingupplentyofpersonalinformation.Facebookthenattemptstomakemoneybysellingtheirdatatoadvertisersthatwanttosend2targetmessages. MostFacebookusersdon'trealizethisishappening.Eveniftheyknowwhatthecompanyisuptotheystillhavenoidea3they'repayingforFacebookbecausepeopledon'treallyknowwhattheirpersonaldetailsareworth. Thebiggestproblemhoweveristhatthecompanykeepschangingtherules.Earlyonyoucouldkeepeverythingprivate.ThatwasthegreatthingaboutFacebook﹣﹣youcouldcreateyourownlittleprivatenetwork.Lastyearthecompanychangeditsprivacyrules4manythings﹣﹣yourcityyourphotoyourfriends'names﹣﹣weresetbydefault默认tobesharedwitheveryoneontheInternet. AccordingtoFacebook'svicepresidentElliotSchragethecompanyissimplymakingchangestoimproveitsserviceandifpeopledon'tshareinformationtheyhavea5satisfyingexperience. SomecriticsthinkthisismoreaboutFacebooklookingtomakemoremoney.Itsoriginalbusinessmodel6involvedsellingadsandputtingthematthesideofthepagetotallyfailed.Whowantstolookatadswhentheyareconnectingwiththeirfriendsonline? Sofartheprivacyissue7landFacebookinhotwaterinWashington.InAprilSenatorCharlesSchumercalledonFacebooktochangeitsprivacypolicy.HealsourgedtheCommissiontosetregulationsforsocial﹣networkingsites. IsuspectthatwhateverFacebookhasdone8invadeourprivacyisonlythebeginningwhichiswhyI'mconsidering9cancelmyaccount.FacebookisahandysitebutI'mupsetbytheideathat30informationisinthehandsofpeopleIdon'ttrust.Thatistoohighapricetopay.
EarlierthateveningmymothercalledtellingmethatmybrotherhadbeenkilledinacarcrashIstumbled跌跌撞撞aroundthehouse1whattoputintothesuitcases.MyhusbandLarryandIhadbeen2formovingtoNewMexico.Thehousewasinatotal3. Itriedtoholdmytears.14pickedthingsupandputthemdownIcouldn't5WhatI'dheardonthephoneechoedthroughmyhead. Larryphonedafewfriends.6someoneaskedtospeaktome.IfthereisanythingIcandoletmeknow.ThankyouIrepliedIdidn'tknowwhatto7. ThedoorbellrangIroseslowlyforthe8ItwasDonna. I'vecometo9yourshoesshesaid10Iaskedhertorepeat.Whenmyfatherdiedittookme11togettheshoescleanedand12formyfather's13saidshe.Ihadn'teventhoughtaboutshoes. ShoesweregatheredDonna14herselfonthefloorandgottowork.Theloveintheact15mytears.Watchingher16ononetaskhelpedmepullmy17intoorder.LaundryfirstItoldmyself.Onebyonethejobsfellintoplace. NowwheneverIhearofanacquaintance's18ofalovedOneIthinkofone19taskthatsuitsthatperson's20.IfthepersonasksHowdidyouknowIneededthat?I'dreplyBecausesomeonedidthat. 1A.forgetting B.imagining C.wondering D.searching 2A.hoping B.packing C.leaving D.planning 3A.damage B.failure C.despair D.mess 4A.aimlessly B.helplessly C.quickly D.decisively 5A.hurry B.decide C.focus D.move 6A.Constantly B.Luckily C.Suddenly D.Happily 7A.callfor B.askfor C.talkabout D.getacross 8A.telephone B.doorbell C.person D.door 9A.gather B.remove C.clean D.repair 10A.Touched B.Shocked C.Confused D.Amused 11A.minutes B.hours C.weeks D.decades 12Awashed B.coped C.selected D.shined 13A.satisfaction B.funeral C.death D.wishes 14A.laid B.stood C.rested D.settled 15A.released B.held C.stopped D.caused 16A.emphasizing B.concentrating C.insisting D.depending 17A.thoughts B.house C.sadness D.luggage 18A.feeling B.meeting C.loss D.story 19A.specific B.normal C.strange D.perfect 20A.idea B.personality C.identity D.need
AShanghaipolicemantookontheroleofsontohelpcomfortanelderlycouple1hadlosttheirownsoninadeadlyaccident. In2003LiangQiaoyingandherson2exposetopoisongasduringanaccident.Thewomansurvivedbutheryoungsonwas3lucky.AndLiangwasleftmentally﹣disabled.HerhusbandXiaZhanhaicouldn'tbeartotellherthe4trueabouttheirson.Insteadwheneverhiswifeaskedtoseethesonhekept5saythattheirsonhadgonetoworkinanothercity. In2010whilewatchingatelevisionshowXiaZhanhaiwasamazedtoseeanofficerthatlooked6exactlikehisson.Heimmediatelyknewthattheyoungmanwastheanswertomakinghiswifesmileagain. With7helpofthetelevisionstationandthepolicestationthecouplewereabletomeettheverypolicemanonaTVshow. Theyoungpolicemanwastouchedby8theylossandsadnessandsaidthathewasmorethanwilling9actastheson.Althoughhestillhesitatedtocallanotherwomanmumhismotherwashappytosupporthisaction. Theirreunionlastedjustafewminutesontheshowbutithadalastinginfluence10thesickmother.
Dujiangyanistheoldestman﹣madewatersystemintheworldandawonderinthedevelopmentofChinesescience.1buildover2200yearsagoinwhatisnowSichuanProvinceinSouthwestChinathisamazingengineering2achieveisstillusedtoday. InancienttimestheregioninwhichDujiangyannowstands3sufferfromregularfloodscausedbyoverflowfromtheMinjiangRiver.4helpthevictimsofthefloodingLiBingtheregiongovernortogetherwithhissondecidedtofindasolution.LidesignedaseriesofchannelsbuiltatdifferentlevelsalongMountYuleithatwouldtakeawaythefloodwaterwhileleavingtheriverflowingnaturally.5goodstilltheextrawatercouldbedirectedtothedryChengduPlainmaking6suitableforfarming. Oncethesystemwasfinishednomorefloodsoccurredandthepeoplewereabletolive7peaceful.TodayDujiangyanisadmiredbyscientistsfromaroundtheworldbecauseofonefeature.Unlikemoderndams8thewaterisblockedwithahugewallDujiangyanstillletswaterflowthroughtheMinjiangRivernaturally9enableecosystem生态系统andfishpopulationstoexist10harmony.
Youcanusemeasalastresort选择andifnobodyelsevolunteersthenIwilldoit.ThiswasanactualreplyfromaparentafterIputoutarequestforvolunteersformykids'lacrosse长曲棍球club. Iguessthatthere'sprobablysomedemandingworkscheduleorsocialanxietyaroundsteppinguptohelpforanunknownsport.Shemayjustneedalittlepersuading.SoItryagainandtugattheheartstrings.ImentionthesingleparentwithfourkidsrunningtheshowandItalkaboutthedadcoachingateamthathiskidsaren'tevenon…AtthispointtheunwillingparentspeaksupAlright.YesI'lldoit. I'msecretlyrelievedbecauseIknowthere'srealpowerinsharingvolunteerresponsibilitiesamongmany.Theunwillingparentorganizesthemealschedulesendsoutemailsandcollectsmoneyforend﹣of﹣seasongifts.Somewherealongthewaythesameparentendsupbecominganinvaluablememberoftheteam.Thecoachisabletofocusonthekidswhiletheotherparentsarerelievedtobeoffthehookforanotherseason.Handingoutslicedorangestobloodthirstykidscanbeasexcitingaswatchingyourownkidscoreagoal. Stillmostofusvolunteersbreatheasighofreliefwhentheseasoncomestoaclose.ThatreliefiscoupledwithadeepunderstandingofwhythesamepeoplekeepcomingbackformoreConnectingtothecommunity社区asyoufreelygiveyourtimemoneyskillsorservicesprovidesarealjoy.Volunteeringjustfeelssogood. InthatsenseI'mprettysurevolunteeringismoreofaselfishactthanI'dfreelyliketoadmit.HoweverifothersbenefitintheprocessandIgetsomerewardtoodoesitreallymatterwheremymotivationlies? 1Whatcanweinferabouttheparentfromherreplyinparagraph1? A.Sheknowslittleabouttheclub. B.Sheisn'tgoodatsports. C.Shejustdoesn'twanttovolunteer. D.She'sunabletomeetherschedule. 2Whatdoestheunderlinedphrasetugattheheartstringsinparagraph2mean? A.Encourageteamwork. B.Appealtofeelings. C.Promotegooddeeds. D.Provideadvice. 3Whatcanwelearnabouttheparentfromparagraph3? A.Shegetsinterestedinlacrosse. B.Sheisproudofherkids. C.She'llworkforanotherseason. D.Shebecomesagoodhelper. 4Whydoestheauthorlikedoingvolunteerwork? A.Itgivesherasenseofduty. B.Itmakesherveryhappy. C.Itenableshertoworkhard. D.Itbringshermaterialrewards.
ElizabethLaird1greeteverysoldierthathaspassedthroughFortHoodsince2003.Shestartedbyshaking2handbutonedayasoldierwentin3ahug.Thenthenextguywantedonetoo.AndnowbyherestimateLairdhasgivenoutover500000hugsintheactofbothseeingoff4welcomingbacksoldiers. The83﹣year﹣oldfromTexaswouldliketoseethatnumberincreasebut5recentthathasn'tbeenpossible.OnNov.3Laird6admittotheMetroplexHospitalwhenthecancershehasbeenbattlingwithsince2005putherinaweakenedstate. Oncewordgotout7thehugladywasonhospitalsoldiersstartedliningup8giveherahug.Sometimesthelineisso9lengththatshehastoturnpeopleaway. Thesoldiersaren'ttheonlyonessurprisingher.OnWednesdayLairdreceivedaletterfromPresidentGeorgeW.Bushtothankherforwhatshe'sdoing. Ididnotdothistoberecognizedalthough10wasexcitingtohearfromBushLairdsaid.MyhugstellthesoldiersthatIappreciatewhatthey'redoingforus.
Manypeoplelookforwardtotheholidayseasonwhichprovidesanopportunitytotakeafewdaysofforgoonagetaway.1Thecombinedeffortofshoppingattendingsocialeventsandentertainingguestscanquicklybecometoomuchtohandle. 2Thismeansyoumayendupwithfinancialpressure.Topreventstressovermoneyplanaheadreviewyourfinancesandcomeupwithapracticalbudget. Purchasesshouldn'taffectyourabilitytopayyourbillsnorshoulditresultincostlycreditcarddebt. Theholidayseasonisstressfulwhen.youhavetoomuchonyourplate.3 Youactuallyneedn'tcancelyourplansbutmakesureeverythingdoesn'thavetobeperfectandyoudon'thavetodoeverythingyourself﹣getyourfamilyinvolved. AholidayseasonisnotalwaysanintervaloftruerelaxationSometimesitcanmeanalotofrushingaroundwithconfusionallowingyounomomentalone.4 Evenaslittleas15minutesalonecanmakeaworldofdifferenceasyouneedtotakeabreatherandclearyourmind! Beinginclosequarterswithyourfamilymembersforalongholidaycanbestressfulinitself.Becauseofyourdifferentpersonalitiesitmaybeeasytorubeachotherthewrongway.Ifyouleteveryremarkgetunderyourskinyou'llbestressedouttheentiretime.5Don'tlettheactionsofothersrobyouofyourjoy. A.Holidaysandexpensesgohandinhand. B.Sodoremembertomaketimeforyourself. C.Setasideyourdifferencesandagreetodisagree. D.Therearealotofexpectationsaroundtheholidays. E.Buttheholidayseasoncanalsobeaverystressfultime. F.Youdonotactuallyrealizeitisagreatrelieftoyourtightmood. G.Thisisespeciallytrueifyouhostfamilypartiesforout﹣of﹣townguests.
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