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如图,四面体S﹣ABC中,D为BC中点,点E在AD上,AD=3AE,则=( )
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高二上学期数学《》真题及答案
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设四面体ABCD各棱长均相等S为AD的中点Q为BC上异于中点和端点的任一点则△SQD在四面体的面B
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如图所示四边形ABCD中AD∥BCAD=AB∠BCD=45°∠BAD=90°将△ABD沿BD折起使平
-BCD,则在四面体A.-BCD中,下列说法正确的是( )
A.平面ABD⊥平面ABC
平面ADC⊥平面BDC
平面ABC⊥平面BDC
平面ADC⊥平面ABD
2012年高考上海理如图AD与BC是四面体ABCD中互相垂直的棱BC=2若AD=2c且AB+BD=A
如图四棱锥P-ABCD中PA⊥地面ABCDAD∥BCAB=AD=AC=3PA=BC=4M为线段AD
设四面体ABCD各棱长均相等S为AD的中点Q为BC上异于中点和端点的任一点则△SQD在四面体的面B
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将图1中的等腰直角三角形ABC沿斜边BC的中线折起得到空间四面体ABCD如图2则在空间四面体ABCD
相交且垂直
相交但不垂直
异面且垂直
异面但不垂直
将图1中的等腰直角三角形ABC沿斜边BC的中线折起得到空间四面体ABCD如图2则在空间四面体ABCD
相交且垂直
相交但不垂直
异面且垂直
异面但不垂直
在四面体O-ABC中为BC的中点E.为AD的中点则=用abc表示
如图在四面体A.-BCD中AD⊥平面BCDBC⊥CDAD=2BD=2M.是AD的中点P.是BM的中点
如图四面体ABCD中△ABC是正三角形AD=CD.1证明AC⊥BD2已知△ACD是直角三角形AB=B
如图四边形ABCD中AD∥BCAD=AB∠BCD=45°∠BAD=90°将△ABD沿BD折起使平面A
平面ABD⊥平面ABC
平面ADC⊥平面BDC
平面ABC⊥平面BDC
平面ADC⊥平面ABC
如图所示四边形ABCD中AD∥BCAD=AB∠BCD=45°∠BAD=90°将△ABD沿BD折起使平
-BCD,则在四面体A.-BCD中,下列说法正确的是( )
A.平面ABD⊥平面ABC
平面ADC⊥平面BDC
平面ABC⊥平面BDC
平面ADC⊥平面ABD
如图四边形ABCD中AD∥BCAD=AB∠BCD=45°∠BAD=90°将△ABD沿BD折起使平面A
﹣BCD,则在四面体ABCD中,下列结论正确的是( )
A.平面ABD⊥平面ABC
平面ADC⊥平面BDC
平面ABC⊥平面BDC
平面ADC⊥平面ABC
如图所示四边形ABCD中AD∥BCAD=AB∠BCD=45°∠BAD=90°将△ABD沿BD折起使平
-BCD,则在四面体A.-BCD中,下列说法正确的是( )
A.平面ABD⊥平面ABC
平面ADC⊥平面BDC
平面ABC⊥平面BDC
平面ADC⊥平面ABD
如图在四面体ABCD中△ABC是等边三角形平面ABC⊥平面ABD点M.为棱AB的中点AB=2AD=∠
在正四面体O.—ABC中D.为BC的中点E.为AD的中点则=__________________用a
如图所示四面体ABCD中ABBCBD两两互相垂直且AB=BC=2E.是AC中点异面直线AD与BE所成
设四面体ABCD各棱长均相等S为AD的中点Q为BC上异于中点和端点的任一点则△SQD在四面体的面B
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设四面体ABCD各棱长均相等S为AD的中点Q为BC上异于中点和端点的任一点则△SQD在四面体的面B
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如图所示在四面体ABCD中EG.分别为BCAB的中点F在CD上H在AD上且有DF∶FC=DH∶HA=
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Reynoldshadjustturnedsevenandhaddevelopedherownuniqueidentityasatomboy.MostgirlsheragewantedtoplaywithBarbiedollswhileshepreferred1hairandjeans.Andshehopedtobecomeaprofessionaldirtbikerider.HermotherAlexandriawasabit2becausesheknewthatsomekidscouldbemeantostudentswithdifferentcharacteristics.ButsheandherhusbandgaveReynoldsadirtbikeasa3gift!They4herinterest. ForReynoldsschoolhadbecomeareal5especiallyaftershetoldeveryonethatshehadgotadirtbikeforherbirthday.Itdidn'ttakelongforsomeofher6tovoicetheiropinions.Astimewentonshewas7constantly. Reynolds'parentsraisedtheirkidstobe8andindependent.Theywere9thatReynoldscouldhandlethesituationonherown.Andthat'sexactlywhatshedid.Shesimply10allthenegativitybehindandkeptongoingaboutherday.But11herbreakingpointgrewcloser.Reynolds12tosetfootinschool.Alexandriadecidedto13upwithaplan. Alexandriaarrangedtohaveabikergroup14Reynoldstoschoolthatday.They15somepolicemen.Youcanimaginehow16Reynoldswastohermom.Theymadeatinyvestandhelmetforhertowear.Whenthegrouppulleduptotheschoolherclassmateswereamazed.Suddenlyeverything17.Herclassmateshadawholenew18forherincludingthemeankidswhohadlaughedather.Thisallowedherinnerhappinessto19. Reynolds20totheworldthatweshouldneverbeafraidtobewhoweareorallowotherstocontrolusthroughfear. 1A.long B.short C.beautiful D.soft 2A.excited B.annoyed C.worried D.ashamed 3A.Christmas B.NewYear C.graduation D.birthday 4A.encouraged B.developed C.reminded D.declared 5A.comfort B.challenge C.support D.dream 6A.neighbors B.friends C.teachers D.classmates 7A.envied B.cheated C.teased D.defeated 8A.generous B.cautious C.tough D.gentle 9A.proud B.confident C.satisfied D.surprised 10A.left B.followed C.turned D.pull 11A.luckily B.hopefully C.directly D.eventually 12A.decided B.begged C.agreed D.refused 13A.put B.come C.catch D.team 14A.welcome B.drive C.accompany D.push 15A.included B.accepted C.introduced D.employed 16A.regretful B.fearful C.grateful D.helpful 17A.changed B.happened C.came D.broke 18A.respect B.concern C.trust D.anger 19A.disappear B.fade C.hide D.return 20A.explained B.proved C.lied D.announced
ThegymwhereMontgomeryCountySpecialOlympicswasholdingitseighthyearlyshowofunified联合的basketballatBlessedSacramentSchoolwasfilledwithcheerleaders啦啦队队员parentsandfriends.Thewallswerecoveredwithpostersmadebythird﹣and﹣fourth﹣gradersattheschool.Andalltheelementarymiddleandhighschoolunifiedteamswereplayinghardandhavingfun.Everybasketnomatterwhichteamscoresischeeredandcelebrated. SpecialOlympicssupportmorethan20unifiedgames.Whatareunifiedgames?Theyareprogramsdesignedforplayerswithspecialneeds.Inthegamestheyplaywithkidswhoarevolunteerscalledunifiedpartners.Thespecialathletesareunabletoplaynormallylikeotherhealthykidsandsomeofthemarewheelchairusers.Inbasketballtheunifiedpartnersrebound抢得篮板球passandsometimespushaspecialathlete'swheelchair.AsBrianRossaseventh﹣graderatSt.AlbansSchoolinWashingtonsaysYoujusttrytohelpandgeteveryonetotakepart. Somespecialathleteshavecomealongwaytobewheretheyare.CalebHeadisa15﹣year﹣oldspecialathlete.WhenhestartedCalebwouldonlystandatthedoorandwatch.ThenCalebbegantopracticehisshootingbutstillwouldnotplayinthegames.NowCalebrunsupanddownlookingforhisshot. Thespecialathletesarenottheonlyoneswhobenefitfromunifiedsportstheunifiedpartnersdotoo.MarlaGrusinwhosesonTylerisaspecialathletesayseverykidshouldcometoaSpecialOlympicsgame.Iftheydotheywilllearntosharetheballandthatthegameisnotallaboutme. Notabadlessonforanyathlete. 1Thefirstparagraphisabout. A.themeaningofunifiedgames B.anexcitingunifiedbasketballgame C.thebenefitsofplayingbasketball D.SpecialOlympics'development 2SpecialOlympicsareespeciallyheldforstudentswho. A.knowlittleaboutballgames B.lovecheerleading C.aredisabled D.wanttobecomeastarplayer 3AccordingtothetextBrianRossismostprobably. A..aunifiedpartner B.aspecialathlete C.acheerleader D.abasketballteacher 4AccordingtoGrusintakingpartinSpecialOlympicsgamescanhelpchildren. A.learnbasicbasketballskills B.getbettergrades. C.improvetheirhealth D.becomemoreselfless
AsofTuesdayChineseboxofficehitWolfWarrior2hasearnedmorethan3.4billionyuan﹩507million1breakChina'sall﹣timeboxofficerecordwhich2setlastyearbyHongKongcomedyTheMermaid. TheleadingcharacterisLengFengplayedbyWuJingthefilm'swriteranddirector.Lengisa3fearformerspecialforcessoldierofthePeople'sLiberationArmy.Duringamilitaryrebellion反叛in4AfricancountryLengalmostsingle﹣handedlyhelpsChineseworkersandAfricanlocalsescapethewar﹣tornnation.Butthefightingscenesalonedon'texplainthemovie's5succeed﹣﹣it'salsothepatriotism爱国主义andspiritofthefilmprojects6haveimpressedChineseaudiences. TongYemenga32﹣year﹣oldofficeworkerfromBeijingIfeltsoproudof7IcountrywhenIsawWuJingwavingthenationalflaginthewarzoneshesaid.Itshowedour8increasenationalpower. Themovie'spatrioticreactioncanbeattributedtoitstiming.WolfWarrior2hitcinemasasIndiaandChinawereinvolved9aborderdisputeasthecentralgovernmentispromotingitsinternationalBeltandRoadInitiative倡议10asthePeople'sLiberationArmycelebratedits90thanniversary.
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WhenIwaseightIgotmyfirstpairofglasses.FarfrombeingmadefunofatschooltheonlystruggleIgotwasendlessrequeststotryonmynewglasses.HearingaboutwhathappenedatschoolmyfatheroncelookedatmeandaskedwhetherIhadpretendedtobetheblindnessjusttolooklikeHarryPotter? WithmystrangehairandglassesIdidnothingtoavoiditeither.TheHarryPotterbookswerethegreatpopculturaleventofmygenerationwhobeganreadingagain.MyschoollibrarianbothconfusedandannoyedbyusPotterfansdealtwithfightsovertheschoolsfewoldcopiesbysettinganewruleHarryPottercouldbeborrowedforonlythreedaysinsteadofthewholeweekofborrowingperiodeveryothertitlewasallowed. Inthe20yearssincethefirstbookarrivedonshelvespublishersandparentshavebeenaskingwhathasmadeJ.K.Rowling'sbookssoloved.Itisbettertolookattheinfluencetheyhavehadontheirreaders.Yesthebookswereaboutaboytakingonadarkandpowerfulenemyinthemagicalworldbuttheywerealsoaboutlovedefeatinghatedeterminationandchoosingbetweenwhatiseasyandwhatisright.Rowling'sentiremagicalcharacterswereallpeoplewewanttobe. IgrewupwithHarryandtogetherwebecamechildrenwithourownopinionsteenseasytogetangryandyoungadultsthinkingofeverythingasnormal.Whenthefinalbookcameoutin2007.Ireaditfor12hourswithoutabreakandcriedasIfinishedit.IfeltsomethingsadtheendofHarry'sstorysignaledtheendofmychildhood.Iwassuddenlyaimless.MeanwhilemynowPotter﹣madfatherwalkedimpatientlynearbywaitingforthepropermomenttotakethebookawayfromhisdaughter. HarryPotterdidshapemygeneration.AsagirlwhogrewupmostlyinpeacetimemanyoftheideasIfoundinthesebookswereoneswehadnevercomeacrossbefore.Themagicalworld'sterribletreatmentofnon﹣humanbeingswasthefirstdescriptionofslaveryIknew.ThetreatmentofHarry'steacherRemusLupinwhohideshisconditionatworkisametaphor比喻fortheshamesurroundingthosewhosufferfromAIDS.Andallsettingslikethismayhavereal﹣worldreflections.AstudyfoundthatteenageHarryPotterreadersshowedmoretolerance包容towardsthosewhoweresuffering.IsitpossiblethatJeremyCorbyn'spopularityamongtheyounghadanythingtodowiththeirliteraryeducation?IsitpossiblethatHarryPotterinthe20yearshehasbeenwithushasinspiredagenerationtobemoreempathetic感同身受welcomingandsociallyopen﹣mindedthanthosebeforeit?WewillseeIfnotatleastmyglassesarestillcool. 1Paragraph1isintendedtoshow. A.theauthorssufferingscausedbytheglasses B.theauthorscloserelationswithotherstudents C.themisunderstandingbetweentheauthorandherfather D.thepopularityofHarryPorteramongstudents 2HowdidtheschoollibrarianstopthefightsbetweenPotterfans? A.BypreventingPotterfansborrowingHarryPottermanytimes B.BysellingtheHarryPorterbooksinthelibrary. C.BycreatinganewruleforHarryPotter'sborrowingperiod. D.BybuyingmoreHarryPotterbooksforthelibrary. 3WhatcanwelearnabouttheHarryPotterbooksfromParagraph3? A.Thebookhasbeenthemostpopularoneamongallthebooksfortwentyyears. B.Itisthestoryofrevenge复仇inthemagicalworldthatmakesthebookpopular. C.Readersarecrazyaboutthebookbecauseithastaughtthemhowtoloveandmakewisechoices. D.Thebookhashadsuchgreatinfluenceonthereadersthattheyallwanttobemagicalpersons. 4WhydidtheauthorcrywhenshereadHarryPotterthatcameoutin2007? A.BecauseshesuddenlyfoundthatshewastoooldtoreadHarryPotter. B.Becauseherfatherwasforachancetotakeherbookaway. C.Becauseshehadnoplanforwhattodoafterherchildhoodended. D.Becauseshewastoosadtoknowthe2007bookwasthelastHarryPotterbook. 5TheunderlinedwordsignaledinParagraph4isclosestinmeaningto. A.described B.created C.changed D.marked 6What'sthelastparagraphmainlyabout? A.HarryPotterhasgreateffectsontheauthor'sgeneration. B.ThecharactersinHarryPorterwerecreatedthroughgreatimagination. C.ComparedwithotherpeopleHarryPotterreadersaremoretolerant. D.ReadingHarryPotterisimportantforchildrenlivinginpeacetime.
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TomhasbeendreamingofbecomingabankerandIbelievehefinanceinuniversityattheageof20. A.willbestudying B.hadstudied C.hasstudied D.wouldstudy
Idon'tconsidermyselftobeavegetarianatleastnotinthestrictestsenseoftheterm.ThetworulesIfollowasasemi﹣vegetarianarethatInevercookmealsathomeusingmeatnordoIordermeatdisheswhendiningout.Obviouslythesearen'ttheonlyoccasionswhenIhavemeals.MyfriendssometimesthrowdinnerpartiesandIwouldn'twanttoforcemydietarybeliefsuponthem.SoIeatwhatevertheyprepare. I'mnotoffendedbythetasteofmeatatall.ActuallyIgrewupeatingmeat.AsanadulthoweverIbecamemoreconsciousofmyeatinghabits.IstartedtoeatlessandlessmeatuntilonedayIfoundthatIcouldgoformonthswithouteatinganymealscontainingmeatatall.Ibegantoexploretheideaofgivingupanimal﹣basedfoodsaltogetherjusttoseehowIwouldgeton. Soonenoughawholenewworldoffoodopeneduptome.Istartedeatingalotofvegetables.WhatIdiscoveredisthatmaintainingavegetariandietisnotonlyhealthydeliciousandinexpensiveit'salsoabundantinvariety. Evenwithallthehealthbenefitsofavegetariandiet﹣lowerriskofheartattackpreventionofhighbloodpressurereducedratesofcancer﹣therestillseemstobeacompletelackofvegetarianrestaurantsandashortageofvegetarianoptionsatmostrestaurants.Ibegantowonderifpeopleweresimplyaddictedtomeat.ThatmaybetrueforsomebutforotherswhomightgivevegetarianismatryIrealizedthattherewassomethingelseintheway﹣thecultureofvegetarianismappearedtobeunpleasant.Itseemsthattherearetoomanyvegetarianswhobelievethattheirwayofeatingissuperiortoanyother.Theyaren'tjustvegetariansthey'rebetterpeopleorsotheythink.Thisisratheroffensive. SoIproposethatwethevegetariansoftheworldshouldbecomemorerelaxedaboutourmeat﹣eatingfriends.Perhapsifvegetarianismisseentobeanattractiveoptionmorepeoplemighttryit.Isupposeforvegetarianismtotakerootinsocietyforalltoenjoyitneedstochangeitsimagetoonethatisfuninvitingandworthfollowing. 1Whydoestheauthoreatwhateverhisfriendsprepare? A.Hehasnochoice B.Thefoodisappealing C.Hewantstobeapoliteguest D.Itdoesn'tbreakanyofhisrules 2Howdidtheauthorgiveupmeat? A.Throughagradualprocess B.Throughthehelpofothervegetarians C.Bycookingvegetarianmealsathome D.Bysettinghimselfagoalofeatingnomeat 3Whatdoestheauthorthinkisthemainproblemwithvegetarians? A.Theyareaggressive B.Theyareprideful C.Theyareunsocial D.Theyarerude 4Thephrasetakerootinthelastparagraphreferstovegetarianismbecomingmore A.valuable B.fashionable C.exciting D.established
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Failureisprobablythemostexhaustingexperienceapersoneverhas.Thereisnothingmoretiringthannotsucceeding. Weexperiencethistirednessintwowaysasstart﹣upfatigue疲惫andperformancefatigue.Inthe formercasewekeepputtingoffataskbecauseithaseithertooboringortoodifficult.Andthelongerwedelayitthemoretiredwefeel. Suchstart﹣upfatigueisveryrealevenifnotactuallyphysicalnotsomethinginourmusclesandbones.Thesolutionisobviousthoughperhapsnoteasytoapplyalwayshandlethemostdifficultjobfirst. YearsagoIwasaskedtowrite102essaysonthegreatideasofsomefamousauthors.ApplyingmyownruleIdeterminedtowritetheminalphabeticalorderneverlettingmyselfleaveoutatoughidea.AndIalwaysstartedtheday'sworkwiththedifficulttaskofessay﹣writing.Experienceprovedthattheruleworks. Performancefatigueismoredifficulttohandle.Thoughwillingtogetstartedwecannotseemtodothejobright.Itsdifficultiesappearsogreatthathoweverhardweworkwefailagainandagain.InsuchasituationIworkashardasIcan﹣thenlettheunconscioustakeover. WhenplanningEncyclopediaBritannicaIhadtocreateatableofcontentsbasedonthetopicsofitsarticles.NothinglikethishadeverbeendonebeforeanddayafterdayIkeptcomingupwithsolutionsbutnoneofthemworked.Myfatiguebecamealmostunbearable. OnedaymentallyexhaustedIwrotedownallthereasonswhythisproblemcouldnotbesolved.Itriedtoconvincemyselfthatthetroublewaswiththeproblemitselfnotwithme.RelievedIsatbackinaneasychairandfellasleep. AnhourlaterIwokeupsuddenlywiththesolutionclearlyinmind.Intheweeksthatfollowedthesolutionwhichhadcomeupinmyunconsciousmindprovedcorrectateverystep.ThoughIworkedashardasbeforeIfeltnofatigue.Successwasnowasexcitingasfailurehadbeendepressing. HumanbeingsIbelievemusttrytosucceed.Successthenmeansneverfeelingtired. 1Peoplewithstart﹣upfatiguearemostlikelyto. A.acceptfailure B.workhard C.seekhelp D.delaytasks 2Whatdoestheauthorrecommenddoingtopreventstart﹣upfatigue? A.Doingthingsinstrictorder. B.Buildingupphysicalstrength. C.Leavingoutthetoughestideas. D.Dealingwiththehardesttaskfirst. 3Onwhatoccasiondoesapersonprobablysufferfromperformancefatigue? A.Beforestartingadifficulttask. B.Whenallthesolutionsfail. C.Ifthejobisratherboring. D.Afterfindingawayout. 4Whatcouldbethebesttitleforthepassage? A.SuccessIsBuiltuponFailure B.HowtoHandlePerformanceFatigue C.GettingoverFatigueAWaytoSuccess D.FatigueAnEarlySignofHealthProblems
氮及其化合物与人类生产生活息息相关. 1在现代化学中常利用上的特征谱线来鉴定元素称为光谱分析. 2基态N原子的价电子占据的能量最高的能级是价电子在该能级上的排布遵循的原则是. 3NH4BF4氟硼酸铵是合成氮化硼纳米管的原料之一.lmolNH4BF4含有mol配位键. 4化肥NH42SO4中会含有N4H4SO42该物质在水中电离出SO42﹣和N4H44+N4H44+遇到碱性溶液会生成一种形似白磷P4的N4分子.N4比P4的沸点原因为. 5尿素H2NCONH2也是一种常用的化肥其分子中原子的杂化轨道类型有σ键和π键数目之比为. 6Cu3N具有良好的电学和光学性能其晶胞结构如图.Cu+半径为apmN3﹣半径为bpmCu+和N3﹣都是紧密接触的刚性小球则N3﹣的配位数为Cu3N的密度为g•cm﹣3.阿伏加德罗常数用NA表示
ABristolteacherhasprovedthatyoudon'thavetoearnafortunetobeabletomakeendsmeet.KathKellyspentayearlivingonjustonepoundperday.Thismoneydidnotincludetherentofherroomonasharedflatortheutilitybills水电费whichwereallpaidinadvance.1Themotivationfortheexperimentcamefromherconcernaboutbuyingaweddingpresentforherbrotherandhisfiancée.Atthetimeshehadanincomeof﹩10000ayearwhichmeantthatshewasfairlyhardupmostofthetime. 2Ifshespentlessthan﹩1adayshecouldnotcarrythemoneyover.Shealsodecidednottoborrowfromfriends. Kathwasoftenattendingfreeeventsfrombooklaunchestogalleryopenings…3Buseswereoutsoeveryjourneyhadtobemadeonfootorbybicycleandasshecouldn'taffordphonecallsshewouldvisitfriendsorleavethemnotesifshehadanythingtotellthem. 4Insteadofmeetingforlunchinacafeasweusedtowe'dtakesandwichesandeatthemonabenchintheparksheexplains. AttheendoftheyearKathwasabletobuyherbrotherandhisnewwifea﹩1300lifemembershipoftheNationalTrustasaweddingpresentwithhersavings.5Whilehelpingoutonafarmshemethercurrentboyfriendandfoundtrueloveatlast. A.Shewouldattendanyeventthatmighthavefreesnacks. B.Shemadesoupsfromwhatevervegetablesshecouldfind C.Fromthebeginningshesetsomeverystrictrulesforherself. D.Kath'spromiseofpovertyactuallymeantshewentoutmore E.Kathsaysherfriendsweregreataboutthechangeinherlifestyle F.Howeveritdidhavetocovereverythingelseincludingclothingandfood G.Besidesachievingwhatshe'dsetouttodoKath'sexperimentalsohadanunexpectedresult.
FiveyearsagowhenItaughtartataschoolinSeattleIusedTinkertoysasatestatthebeginningofatermtofindoutsomethingaboutmystudents.IputasmallsetofTinkertoysinfrontofeachstudentandsaidMakesomethingoutoftheTinkertoys.Youhave45minutestodayand45minuteseachdayfortherestoftheweek.Afewstudentshesitatedtostart.Theywaitedtoseetherestoftheclasswoulddo.Severalotherscheckedtheinstructionsandmadesomethingaccordingtooneofthemodelplansprovided.Anothergroupbuiltsomethingoutoftheirownimaginations. OnceIhadaboywhoworkedexperimentallywithTinkertoysinhisfreetime.Hisconstructionsfilledashelfintheartclassroomandagoodpartofhisbedroomathome.Iwasdelightedatthepresenceofsuchastudent.Herewasanexceptionallycreativemindatwork.HispresencemeantthatIhadanunexpectedteachingassistantinclasswhosecreativitywouldinfect感染otherstudents. Encouragingthiskindofthinkinghasadownside.Irantheriskoflosingthosestudentswhohadadifferentstyleofthinking.WithoutfailonewoulddeclareButI'mjustnotcreative. Doyoudreamatnightwhenyou'reasleep? Ohsure. Sotellmeoneofyourmostinterestingdreams.Thestudentwouldtellsomethingwildlyimaginative.Flyingintheskyorinatimemachineorgrowingthreeheads.That'sprettycreative.Whodoesthatforyou? Nobody.Idoit. Really﹣atnightwhenyou'reasleep? Sure. Trydoingitinthedaytimeinclassokay? 1TheteacherusedTinkertoysinclassinorderto. A.knowmoreaboutthestudents B.makethelessonsmoreexciting C.raisethestudents'interestinart D.teachthestudentsabouttoydesign 2WhatdoweknowabouttheboymentionedinParagraph3? A.Helikedtohelphisteacher. B.Hepreferredtostudyalone. C.Hewasactiveinclass. D.Hewasimaginative. 3WhatdoestheunderlinedworddownsideinParagraph4probablymean? A.Mistake. B.Disadvantage. C.Difficulty. D.Burden. 4Whydidtheteacheraskthestudentstotalkabouttheirdreams? A.Tohelpthemtoseetheircreativity. B.Tofindoutabouttheirsleepinghabits. C.Tohelpthemtoimprovetheirmemory. D.Tofindoutabouttheirwaysofthinking.
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.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.每处错误及其修改均限一词2.只允许修改10处多者从第11处起不计分. Dearfriends Howtimeflying!Thetwo﹣weekexchangeprogramhascometotheend.Lookingbackatthepastdayswearegladtosaywehavebeenbenefitedalotfromtheprogram. InthepasttwoweekswecommunicatedwitheachotherfacetofaceinEnglish.NotonlyhavewemadegreatprogressesinouroralEnglishbutwealsohavelearnedmoreaboutyourculture.Besideswewillneverforgetthefarewellpartythatweenjoyedyourpassionatesongsanddancesaswellasthedelicioustraditionallyfoodofyourcountry.Thetimewespenttogetheristoounforgettablethatwewillvaluethemforever. Wedohopetomeetyouagaininthenearfuture!
Incaseyoufeelnervousduringtheinterviewyoucanmakefullpreparations. A.inreturn B.intime C.incommon D.inadvance
Readyformorefunonboard?ConnecttoroKKiWi﹣Fiandtuneintoexcitingvideosthroughoutyourflight!Experiencethrillingentertainmentanddiscovernewworldsasyouenjoyavarietyofinternationalandlocalcontentsusingyourpersonalmobiledevice.Tofindoutwhat'sscreeningonroKKithismonthsimplyvisitwww.rokki.comandcatchthemoviesforfree! PolisEvo Theworldconflictswhentwocopsonefromthecityandtheotherfromasmalltownmeet.AsthetwocontrastingpersonalitiesgoonamissiontotakedownMalaysia'sbiggestdruglordthetwomustlearntoworktogethertoweakenacold﹣bloodeddrugorganization. TheJourney WhenBeereturnstoMalaysiaforthefirsttimeinadecadesheintroducesherconservativefatherUncleChuantoherhappy﹣go﹣luckyBritishfiancéBenji.Despitelanguagebarriersculturaldifferencesandoriginalhesitationfrombothpartiesthetwomencometorealizethattheirpriorities优先权areessentiallyoneandthesame. OlaBola Setinthe1980sduringadisorderlyeconomicperiodOlaBolatellsthestoryofanunlikelyteamofMalaysianfootballersthathasonelastchanceatinternationalglorytoqualifyforthe1980OlympicGames.Disturbedbydisagreementsthatthreatentotearthemaparttheteamhastoovercometheirindividualdifferencesanduniteforthesakeoftheentirecountry. MyPassion﹣DivinginPulauPerhentian JoinAirAsiaAllstarsAndrewScottandAnimEzatibothonanoceanadventure.Theyfacethechallengeofopenwaterdivingforthefirsttime.FromscubatrainingtodiscoveringthebeautyofPerhentianIslandMyPassionfollowsthemontheirexcitingjourneyofcourageastheyconquertheirfearsandmanageitmakingtheirgreatjoy! 1WhatisPolisEvomainlyabout? A.TheunionofaMalaysianfootballteam. B.Twopolicemenjoinforcesandbeatadruggroup. C.Twomenfromdifferentculturesaccepteachother. D.Ahighlychallengingandsuccessfuloceanadventure. 2Whichwillbethebestchoiceifyouarefondofdiving? A.OlaBola. B.MyPassion. C.PolisEvo. D.TheJourney. 3Whatcanbethebesttitleofthetext? A.EntertainmentatYourFingertips B.WellReceivedCinemaFilms C.Bestsellersonwww.rokki.com D.GreatlyPraisedMovies
CoCO3主要用作选矿剂伪装涂料的颜料等.用钴矿石含Co2O3•CoO及少量Fe2O3Al2O3MnO2等生产CoCO3的流程如下 下表列出了几种离子生成氢氧化物沉淀的pH“沉淀完全”是指溶液中离子浓度低于1.0×10﹣5mol•L﹣1 1写出“浸取”步骤Co2O3•CoO发生反应的离子方程式. 2“浸取”步骤除Co2O3•CoO外钴矿石中还能被Na2SO3还原的物质有填化学式. 3加NaClO3的目的是氧化Fe2+NaClO3的用量过多会造成的不良后果是. 4“沉钴”步骤向CoCl2溶液加入NH4HCO3溶液需要55~57℃条件下进行温度控制在55~57℃的原因为. 5已知金属萃取剂对金属离子的萃取率与pH的关系如图所示.请补充完整由“氧化”后的溶液制备CoCO3的实验方案向“氧化”后的溶液中加入得较纯CoCl2溶液加入NH4HCO3溶液沉钴得CoCO3.实验中须使用试剂Na2CO3溶液金属萃取剂盐酸.
假如你叫王平根据图表提示给你的加拿大网友Smith写一封信介绍你的寒假生活共20天可根据自己的实际情况添加细节. 注意1.词数100左右2.开头已经给出不计入总词数. DearSmith Howareyou?Howtimeflies!NowthewintervacationwasoverandIhavecomebacktoschoolagain. Yours WangPing
Asalawyerhemustbeabletoargue逻辑地.
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