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用含钴废料（主要成分为Co，含有一定量的NiO、Al2O3、Fe、SiO2等）制备草酸钴晶体（CoC2O4•2H2O）的工业流程如图．己知：①草酸钴晶体难溶于水②RH为有机物（难电离）．请回答下列问...
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高三下学期化学《》真题及答案
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钴的氧化物广泛应用于磁性材料及超导材料等领域一种利用含钴废料主要成分Co2O3含少量Al2O3MgO
草酸钴是制作氧化钴和金属钴的原料一种利用含钴废料主要成分为Co2O3含少量Fe2O3Al2O3CaO
Al-C质耐火材料的主要成分是Al2O3含量不同
一种含铝锂钴的新型电子材料生产中产生的废料数量可观废料中的铝以金属铝箔的形式存在钴以Co2O3·Co
工业上用铝土主要成分为Al2O3含SiO2Fe2O3等杂质为原料冶炼铝的工艺流程对上述流程中的判断正
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Al2O3是刚玉的主要成分Al2O3属于
酸
氧化物
碱
单质
工业炼铝的流程铝是地壳中含量最多的金属元素在自然界主要以化合态形式存在于氧化铝中铝土矿的主要成分是A
一种含铝锂钴的新型电子材料生产中产生的废料数量可观废料中的铝以金属铝箔的形式存在钴以Co2O3·Co
从铝土矿主要成分是Al2O3含SiO2Fe2O3MgO等杂质中提取氧化铝的两种工艺流程如下请回答下列
用含钴废料主要成分为Co含有一定量的NiAl203FeSiO2等制备草酸钴晶体CoC2O4·2H2O
烟气脱硫能有效减少二氧化硫的排放实验室用粉煤灰主要含Al2O3SiO2等制备碱式硫酸铝[Al2SO4
过去国内硫磺生产用催化剂品种单一目前国内系列化催化剂品种有Al2O3FeSO4/Al2O3TiO2/
分子筛是人工合成的硅铝酸盐化合物的多孔晶体其主要成分是SiO2和Al2O3
铝土矿的主要成分是Al2O3请按要求进行计算1Al2O3中铝元素与氧元素的原子个数比为2Al2O3中
工业上用铝土矿主要成分为Al2O3还含有Fe2O3SiO2提取氧化铝做冶炼铝的原料提取的操作过程如下
人体血液的pH总是维持在7.35～7.45这是由于
血液中含有一定量的Na＋
血液中含有一定量的O2
血液中的HCO3－和H2CO3起缓冲作用
人体内含有大量水分
血液中含有一定量的红细胞
某学生用36.5g盐酸与一定量的水垢主要成分是碳酸钙恰好反应产生了4.4g的CO2气体该盐酸溶质质量
草木灰是一种肥料其主要成分是一种含钾元素的化合物取一定量的草木灰向其中滴加盐酸产生气泡该气体能使澄清
K
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某学生用36.5g盐酸与一定量的水垢主要成分是碳酸钙恰好反应产生了4.4g的CO2气体该盐酸溶质质量
08湖北黄冈5分某学生用36.5g盐酸与一定量的水垢主要成分是碳酸钙恰好反应产生了4.4g的CO2气
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鞋的尺码通常用“码”或“厘米”做单位它们之间的换算关系是b＝2a﹣10b表示码数a表示厘米数．小明今年的脚长为23厘米他要穿码的鞋等小明要穿40码鞋的时候他的脚长厘米．
假定你是李华你的美国笔友来信说他的兄弟Tom下学期将来中国留学希望在中国留学期间找一个寄宿家庭.请你写一封信邀请Tom到你家居住并说明理由. 注意 1.词数100左右 2.可适当增加细节以使行文连贯. .
阅读下面材料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. AcompanyintheUSAispayingitsworkerstosleepmore.StaffattheinsurancecompanyAetnawillget300ayear61addtotheirsalaryiftheygetatleastsevenhoursofsleepanight.Theywillgetjustoveradollarforeachnighttheysleepoversevenhours.Theideabehindthisplanisemployee62perform.Humanresources63officialsayworkerswillworkmoreeffectivelyiftheyhavesleptwell.Aworkforcethatismorerestedmeansthecompanywillperform64well.Staffcaneitherrecordtheirsleepautomatically65useawristmonitororrecordbyhandhowlongtheyhaveslepteverynight. 66numberofstudieswarnthatnotsleepingenoughcanaffectourabilitytodoourjob.TheAmericanAcademyofSleepMedicinesaidthattheaverageworkerintheUSAloses11.3workingdaysofproductivityayearfromalack67sleep.This68costcompaniesabout2280foroneworker.Itestimates估计thattheUSeconomyloses63.2billionayearmainly69workersdonotsleepmorethansevenhoursanight.A2015studybytheRandCorporationshowedthatstaffmemberssleepinglessthansevenhourspernight70findfarlessproductivethanworkershavingeightormorehoursofsleep.
用你喜欢的方法解答． +×27 ×0.32+0.68÷ ÷〔×1﹣〕 32×25×1.25．
WhenIwasstrollingintheparkonedayIpassedsomechildrensellinghotchocolate.OnegirlaskedWouldyouliketohelpsupportourpark?It'sonly50rentsacup.OfcourseIcouldn'thelpbeingextraordinarily1thatkidsshowedgreatinterestin2theircommunity.Theywerehavinggreat3pouringhoichocolateandfeelingproudthattheywerehelpingalocalcause.Itthatthey4graspedabasicideaabouthelpingothersItfeels5. Teachingourchildrentohelpothersbenefitsthemagreatdeal.6bringsthempeaceofmind.Servingthoseinneedalsohelpschildrenlearntomakea7﹣thattheyhavethe8tomakeapositiveimpact.This9asenseofcontrolhelpingthemfeellessfrightened.Italsoreassuresthemthathelpwouldbe10iftheywereeverindanger. Anotherimportant11isthatwearealldependentoneachother.Whenchildrenserveotherstheylearnto12someoneelse'sgreaterneedandto13otherpeople. Therearemanyother14ofmakingcharityapartofyourfamily'slife.You'llmeetnewfriendsanddeveloprelationships.Runningabakesalewillgiveyourkidsachancetopractice15suchasfundraisingmoneymanagementandteamwork.Self﹣explorationanddiscoverywill16throughtheirchoiceofactivities. Ifachildcanbecomeacheerfulcharitablegiverheorshemusttrydifferentvolunteerefforts.Whenyouseethemenjoyingthe17ofthemencouragethemto18. OnmyownexperienceIcansaydevelopingthegood19ofcharitablegivingwillbecome20toyourbestfamilymemoriesandcelebrations. 1A.worried B.impressed C.doubtful D.grateful 2A.organizing B.cleaning C.improving D.controlling 3A.difficulty B.success C.advantage D.fun 4A.already B.seldom C.never D.often 5A.boring B.strange C.great D.relaxing 6A.Teaching B.Giving C.Thinking D.Learning 7A.choice B.promise C.mistake D.difference 8A.ability B.right C.freedom D.time 9A.promotes B.reduces C.reflects D.protects 10A.impossible B.flexible C.available D.reasonable 11A.example B.lesson C.question D.secret 12A.takeover B.searchfor C.relateto D.giveup 13A.believein B.lookfor C.turnto D.careabout 14A.disadvantages B.benefits C.contributions D.methods 15A.activities B.moves C.skills D.behaviors 16A.stay B.miss C.come D.get 17A.equality B.fruit C.effect D.independence 18A.continue B.explain C.observe D.communicate 19A.aspect B.meaning C.habit D.way 20A.hard B.central C.obvious D.Serious
MichaelPhelpshasbrokena2000﹣year﹣oldOlympicrecordbywinningmoreindividualtitlesthanLeonidasofRhodes.Whowasthisathletewhoserecord12individualtitleshastaken2000yearstobeat? Phelpshasatotalof22Olympicgoldmedalsbutintermsofindividualtitleshehasonlyjustpassedthegreatestathleteoftheancientworld.LeonidasofRhodescompetedinfourOlympiadsin164BC160BC156BCand152BCandineachofthesehewonthreedifferentfootraces. Thethreeeventsatwhichhewonwerethestadionasprint短跑ofroughly200mthediauloswhichwastwicethedistanceofthestadionandtheraceinarmour盔甲. Unlikemostracestheraceinarmourrequiredcompetitorstowearheavyarmourpossiblyincludingahelmetabreastplateshinarmourandashieldmadefrombronzeandwood. Hebrokethroughthedistinctionbetweensprintersandendurance耐力athletessaysPaulCartledgeprofessorofclassicsattheUniversityofCambridge.Theraceinarmourhadnotpreviouslybeenconsideredsuitableforsprinters.Theywererunninginarmourthetemperaturewouldbe40℃.Youcanimaginehowitwouldbeinthatrace.Itrequiredcompletelydifferentmusclesandgymnasticskills. ThereisverylittlebiographicalinformationaboutLeonidasandnoimagesofhimsurvivesaysCartledge.Buthisname﹣comingfromtheGreekwordforlion﹣suggestshewasamanofdistinction.AfterhisdeathhewasrespectedasalocalgodinRhodessaysSwaddlingthedirectorofamuseum.HewasalsoveneratedinancientGreekliterature.Pausaniasdescribedhimasthemostfamousrunner.Inthe3rdCenturyPhilostratustheAthenianwroteinhisGymnastikosthatLeonidas'sachievementprovedthatnotallreceivedwisdomaboutathletictrainingandbodytypeswastrue. AstatueofhiminRhodesdisplayedthelegendHehadthespeedofaGod.QuiteareputationforPhelpstoliveupto. 28.HowmanyindividualtitleshasPhelpswonintheOlympics? A.22. B.13. C.12. D.9. 29.Whatcanbeinferredfromthetext? A.Theconditionsofraceinarmourwereunpleasant. B.Leonidaswasaswimmerwithspeedandendurance. C.Leonidasdidn'thavehispicturedrawninhisday. D.PhelpsowedhissuccesstotheinfluenceofLeonidas. 30.Theunderlinedwordveneratedisclosestinmeaningto. A.accepted B.collected C.shaped D.honoured 31.Whatquestiondoestheauthormainlydiscuss? A.WhowasPhilostratustheAthenian? B.WhoisMichaelPhelps? C.WhowasLeonidasofRhodes? D.WhoisPaulCartledge?
下面题中的两个关联的量 小红从家到学校已走的路程和剩下的路程．
1.AddingaPDFtoaKindleviaEmail 1.LocateyourSend﹣to﹣Kindleemail.ThisisaspecificKindleemailaddressthatisattachedtoeachKindledeviceorapp.YoucanfindyourKindleemailaddressbyvisitingtheManageyourDevices''pagefromyourAmazonprofile. •LogintoyourAmazon.comaccount.FromthereclickontheYourAccount''buttonfromthetoolbarattowardsthetopofthepage. •ScrolldownthepageuntilyouseetheDigitalContent''section.ClickontheManageYourContentandDevices''link. •Nowyou'llseethreetabstowardsthetopofthepage.YourContent''YourDevices''andSettings''.ClickontheYourDevices''Tab. •LocateyourKindleandclickonit.Fromthereyou'llseesomeinformation.YourKindleemailwillbedisplayedalongwiththetypeofKindleyouownandtheserialnumber. 2.Addapersonalapprovedemailtoyouraccount.InordertosendemailstoyourKindleandreceiveyourfileseffectivelyyouneedtomakesurethattheemailyou'resendingyourPDFfromisapproved. •NavigatetothePersonalDocumentSettings''pagefromyourManageyourKindlePage''. •FromthesamepagewhereyouviewedyourSend﹣to﹣Kindle''emailclickonthethirdtabattherighttheSettings''tab. •InthesettingstabfromtheManageYourContentandDevices''pagescrollallthewaytowardthebottomofthepageuntilyouseetheApprovedPersonalDocumentE﹣mailList''section. •Hereyoucanseewhichemailaddressesyouhavealreadyapprovedandaddanewemailaddressifyouwish. 3.SendyourPDFasinanemail.NowsimplyopenyouremailandaddressannewemailtoyourSend﹣to﹣Kindleemailaddress.ClickthepaperclipicononyouremailtoattachafileandlocateyourPDF. •IfyouwanttoautomaticallychangeyourPDFtoAmazon's.azwfiletypeforbetterintegrationtypeconvertintothesubjectline. •Youdon'tneedtoincludeanythingelseinyouremail. •MakesurethattheemailyouaresendingyourPDFfromisonyourapprovedlist. 56.WhatistherightorderoflocatingyourSend﹣to﹣Kindleemail? ①clickonYourDevices ②clickonYourContent ③clickonSettings ④visitManageyourDevices ⑤clickonYourAccount ⑥clickonManageYourContentandDevices A.④⑥②③B.⑤⑥①③C.④⑤⑥①D.⑤②①③ 57.InordertoaddaPDFtoaKindleyouwillhaveto. A.createyourKindleemail B.changeyourPDFtype C.haveanemailapproved D.openanewemailaccount.
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拉萨市平均每天的日照时间为8.22小时．先估算一下再计算拉萨全年的日照时间大约是多少得数凑整到个位一年按365天计算
已知平行四边形的面积是20.4cm2图中涂色部分的面积是
科学课上四个实验小组分别调了一杯蜂蜜水．这四杯蜂蜜水中最甜的是
Ifyouhaveadaughtertakethetimetoreadthis.Itcouldsaveheralotofheartache.Nottomentionstomachachesheadachesmisseddaysofschoollowergradeseatingissuesanddepression. Thesadtruthisthateveryschoolwhetherpublicorprivatehasmeangirls.Ibetyoucanstillevenrememberwhotheyarefromyourschool.AsaschoolconsultantandmotherofthreedaughtersIknowfirsthandbothpersonallyandprofessionallyhowmuchithurtswhengirlsaretargetedbybullies恃强凌弱者. Theoldsayingsticksandstonesmaybreakmybonesbutwordswillneverhurtmecouldn'tbefurtherfromthetruth.Whileboysusuallybullythroughintimidation胁迫girlsbullythroughexclusionalsocalledrelationalaggression.Here'sanexampleofacaseofrelationalbullyingtakenfrommyexperienceasaschoolconsultant HeatherwasmiserablebecauseagirlinherclassLesliewasnotonlysayingmeanthingstoherfacebutgettingtheothergirlsintheclasstoexcludeherwiththeageoldlineYoucan'tbefriendswithmeifyou'refriendswithher.InoursessionsHeatherwouldcomplainthatshedidn'thaveanyonetoplaywithbecausegirlswereafraidthatiftheyhungaroundherthey'dbecomeLeslie'snexttarget. InordertoimprovethesituationIhadtonotonlyreducethepowerLesliehadbutempowerHeatheraswell.Herearesomeideasthathelpedadaptedforusebyparents Askforspecificswhenyourdaughtermentionsbullying.Who?Where?How? Telltheprincipalandclassroomteacherthespecificsofhowsheisbeingbullied.Havethemtellotherteachersi.e.gymartmusichallwaymonitorsandcafeteriastaffsothateveryonewhocomesincontactwithhercanbeonthelookoutandreadytointerfere. Explaintoherthatreportinganincidentisnotthesameastattling打小报告andhavehertellanadultatschoolwhensheisbeingbullied. Teachhertoconveyself﹣confidencebywalkingconfidentlywithherheadup.Bulliestargetthosetheythinkareweaker. Arrangeopportunitiesforyourdaughtertosocializewithherfriendsoutsideofschooltohelphermaintainastrongsocialsupportsystem. InHeather'scasethesestepsrelievedtheproblem.Butbecauseit'stoughertocatchgirlbulliesit'sextremelyimportantforgirlstotellanadultiftheyarebeingbullied.Unlikeboyswhousuallybullyphysicallymeangirlsoftenspreadrumorswhisperastheirtargetwalksbytalkloudlyaboutapartyshewasn'tinvitedtogiveherthesilenttreatmentandasdiscussedabovetellothersnottobefriendswithher.Schoolpersonnelaretheretohelpbutinordertodoanythingtheymustknowaproblemexists!
一个圆锥的底面半径是4厘米高是6厘米．和它等底等高的圆柱的体积是立方厘米．
ABOUTBCBOOKPRIZES TheBCBookPrizesestablishedin1985celebratetheachievementsofBritishColumbiawritersandpublishers. ThesevenPrizesarepresentedannuallyattheLieutenantGovernor'sBCBookPrizesGalainthespringwiththewinnerofTheLieutenantGovernor'sAwardforLiteraryExcellencebeingannouncedbeforehandattheannualBCBookPrizesSoireeaneveningparty. ThePrizesareadministeredandawardedbymembersofanon﹣profitsocietywhorepresentallaspectsofthepublishingandwritingcommunity. GeneralCriteria •ThebookmusthaveanISBNInternationalStandardBookNumber. •Thebookmusthaveaprintrunofatleast350copies. •Thebookmustbeatleast48pageslongunlessitisachildren'spicturebookinwhichcaseitmustbeatleast24pageslong. •Thebookmustshowinprintthatitwaspublishedintheappropriateeligible具备条件的year. •ThemainlanguageofthebookmustbeEnglish. •Threecopiesofthesubmittedbookmustbeprovidedforthejudgesforeachprizecategoryentered. •SubmissionsmustbemadeusingtheBCBookPrizesOfficialEntryForm. Expectationsoffinalistsandwinners •ThepublishersoffinalistbookwillbeexpectedtoparticipateinthesharedcostofprintadsplacedinBCnewspapersannouncingthefinalists.Costperbookis100. •AllpublishersauthorsandillustratorsareinvitedtoattendtheSoireewhichisafreeevent.•TicketstotheLieutenantGovernor'sBCBookPrizesGalaarenotprovidedtofinalistssomustbepaidforbytheauthors/illustratorsortheirpublishers. 21.WhatcanwelearnabouttheBCBookPrizes? A.Theyaresponsoredbyanon﹣profitsociety. B.Therearesevenmembersinitsadministrationteam. C.Thewinnersoftheprizeswillreceiveacashprize. D.Theyarepresentedataneveningpartytwiceayear. 22.Whichofthefollowingbookscouldbeacceptedforsubmission? A.AnovelwritteninFrench.B.Abookpublishedinanyyear. C.Achildren'sbookwith48pages.D.Apicturebooktobeedited. 23.What'sthepurposeofthepassage? A.ToattractmoreadsinBCnewspapers. B.TointroducetheBCBookPrizestoreaders. C.Toencouragepeople'sinterestinreading. D.Tocelebratetheachievementsofwriters.
某辆旅游汽车在平原地区行驶了3小时平均每小时行驶60km后来又在山谷地区行驶了相同的路程用了5小时最后到达山顶．求这辆旅游汽车从平原到山顶的平均速度．
甲乙两数比是45甲是乙的%甲比乙少%乙比甲多%．
IsanyeconomistsodullastocriticizeChristmas?Atfirstglancetheholidayseasoninwesterneconomiesseemsatreatforthoseconcernedwithsuchvagaries奇想asGDPgrowth.AfteralleveryoneisspendinginAmericaretailersmake25%oftheiryearlysalesand60%oftheirprofitsbetweenThanksgivingandChristmas.Evensoeconomistsfindsomethingtoworryaboutinthenatureofthepurchasesbeingmade. Muchoftheholidayspendingisongiftsforothers.Atthesimplestlevelgivinggiftsinvolvesthegiverthinkingofsomethingthattherecipientwouldlike﹣hetriestoguessherpreferencesaseconomistssay﹣andthenbuyingthegiftanddeliveringit.Yetthisguessingofpreferencesisnoteasyindeeditisoftendonebadly.Everyyeartiesgounwornandbooksunread.Andevenifagiftisenjoyeditmaynotbewhattherecipientwouldhaveboughtiftheyhadspentthemoneythemselves. Interestedinthismismatchbetweenwantsandgiftsin1993JoelWaldfogelthenaneconomistatYaleUniversitysoughttoestimatethedifferenceindollarterms.Inaresearchheaskedstudentstwoquestionsattheendofaholidayseasonfirstestimatethetotalamountpaidbythegiversforalltheholidaygiftsyoureceivedsecondapartfromthesentimentalvalueoftheitemsifyoudidnothavethemhowmuchwouldyoubewillingtopaytogetthem?Hisresultsweregloomyonaverageagiftwasvaluedbytherecipientwellbelowthepricepaidbythegiver. Inadditionrecipientsmaynotknowtheirownpreferencesverywell.Someofthebestgiftsafterallareunexpecteditemsthatyouwouldneverhavethoughtofbuyingbutwhichturnouttobeespeciallywellpicked.Andpreferencecanchange.SobygivingajazzCDforexamplethegivermaybeencouragingtherecipienttoenjoysomethingthatwasignoredbefore.Thisadesiretobuildskillsispossiblythehopeheldbymanyparentswhoignoretheirchildren'sdesiresforvideogamesandbuythembooksinstead. Finallythereareitemsthatarecipientwouldliketoreceivebutnotpurchase.Ifsomeoneelsebuysthemhowevertheycanbeenjoyedguilt﹣free.Thismightexplainthehighvolumeofchocolatethatchangesovertheholidays.Thusthelessonforgift﹣giversisthatyoushouldtryhardtoguessthepreferenceofeachpersononyourlistandthenchooseagiftthatwillhaveahighsentimentalvalue. 32.ThewordsentimentalinParagraph3iscloseto. A.intelligent B.emotional C.social D.practical 33.AccordingtothetextwhichofthefollowingstatementsisTRUE? A.Priceisnothingbutthefactorwhenyougivegifts. B.Chocolateswillbeblamedwhenpeoplereceivethemasgifts. C.Thereceiversoftenoverestimatethevaluesofgifts. D.Wantsdonotalwayscorrespondtoneedsingift﹣giving. 34.Whichofthefollowingstatementscanbeinferredfromthetext? A.Thegift﹣givertriestoneglecttheactualneedsofthereceiver. B.Thebestgiftsarewellpickedbythegivers. C.Ingift﹣givingguessingpreferenceisoftenafailuresoit'sthethoughtthatcounts. D.Youhavetotakemoneyintoconsiderationwhengivingagift. 35.Thetextismostlikelytakenfroma. A.users'handbook B.medicaljournal C.travelmagazine D.consumer﹣relatedreport.
TheLondonEye4DFilmExperiencestartedinAugustandisincludedintheLondonEyeticketprice.Itisafantastic4DfilmtoentertainyoubeforeyourtripontheLondonEye.The4Deffectsaregreat. NoExtraCosttoYou That'srightyoubuyyourticketfortheLondonEyeand4Dcinemaexperience.MerlinEntertainmentstheLondonEyeownersspent5millioncreatingthefilmandbuildingthe4DcinemaandwantedtoimprovethevalueformoneyoftheLondonEye. WhattoExpect The4DCinemaentranceisinthetickethall.Soafterbuyingyourticketgostraighttoitwhereyou'llbegivenapairofglasses.About160visitorswillpassthroughthe4Dcinemaevery8minutessodon'tworryaboutwaitingtime.Peopleinthebrightpinkcinemaareallstandingonfourlevels.Thetoplevelisdesignedforwheelchairs. LondonEye4DFilm Putonyourglassesandenjoyyourself.ThestoryisaboutalittlegirlvisitingLondonwithherfatherandshewantstobehighertogetabetterviewsoshecomestotheLondonEye.Itdiffersfromwatchingthe3Dfilmforallyoursensesareinvolved.Whenitsnowsonscreenyoufeelitsnowsinthecinema.Andwhenyouwatchthefireworksyoucanreallysmellthem. Forashortfilmlessthanfourminutesbeforethemainattractionyouthinkyou'vecomeforyouaregoingtolovethisfreeextra.Istoodtherewithmymouthwideopenattheendasmanyothersdid.It'sfantastic!TheeffectsaretheHollywoodstandardasnoexpenseisspared.IwasluckyenoughtotrythefilmthreetimesonthefirstdayandIstillwanttogobackagain. 25.Whatdoestheauthormainlytellusinthispassage? A.Hemainlyintroducesthe4DfilmofMerlinEntertainments. B.HemainlyintroducestheLondonEyeentertainmentcenter. C.Hemainlytellsushisexperienceswhilecreatingthe4Dfilm. D.Hemainlyintroducestoushowtotakepartinthe4Dfilm. 26.WhydidtheMerlinEntertainmentsbuildthe4Dfilmcinema? A.BecauseitwantedtoattractmorevisitorstoLondon. B.BecauseitcouldearnmoremoneyfromthepublicintheUK. C.Becauseitcouldprovidemoreentertainmentsforvisitors. D.BecauseitwantedtoincreasethevalueoftheLondonEye. 27.Wherecouldpeoplegetintothe4Dfilmcinema? A.IntheHollywood. B.Inthetickethall. C.UndertheLondonEye. D.Intheticketcenter. 28.Whileseeinga4Dfilmpeoplewillfeel. A.greatlyfrightened B.muchworried C.sweetsmell D.asiftheywereonthescene.
Atatimewhenmanystudentsstillseecollegeastheirbesthopeforarewardingcareerhighereducationhasbecomemoreexpensivefarmorethanthesteadyincreaseinthecostofliving.Asaconsequenceaveragestudentdebtatgraduationiscurrentlypushing$30000.Insomecasesstudentdebtreachessixfigures. Butfallingbeyondthereachofthesefrighteningstatisticsaremanycapablestudentswhodon'taccumulatestudentdebtbecausetheycan'taffordtogotocollegeinthefirstplace. WhichraisesaquestionWouldn'tournationbebetteroffifallAmericanstudentswereencouragedorevenassistedbypublicpolicytopushtheirintellectualcapacitiestotheirmaximums?Whatifallhighereducationinourcountrywereextremelyaffordable?Orevenfree? AsithappenstheAssociatedPressreportedthatbothOregonandTennesseeareconsideringthefeasibility可行性ofno﹣tuitionpoliciesfortheircommunitycolleges. ThelogicbehindtheseeffortsiswellexplainedbyOregonStateSenatorMarkHassIthinkeverybodyagreesthatwithahighschooleducationbyitselfthereisnopathtothemiddleclass.Thereisonlyonepathanditleadstopoverty.Andpovertyisveryexpensive. Hassmayoverstatethecaseslightly.Despitethelackofgoodblue﹣collarjobsinourcountryobsthatwouldfirmlyestablishaworkerinwhatt'sleftofthemiddleclassandprovidepaidvacationapensionandhealthinsurancehighschoolgraduatemightstillpiecetogetherenoughworktokeephimselfmoreorlessabovethepovertylineeventhoughaccesstothetrueAmericanDreamwillstillbeverydifficult. ButthesecondpartofHass'sargumentisundeniable.Ourfailuretoeducateourselvestoourfullpotentialisveryexpensive.HassreferstoresearchfromtheOregonUniversitySystemthatindicatesthatOregonianswithonlyahighschooldegreemakelessmoneyandthereforepayfewertaxesthanthosewithcollegedegrees.Theyarealsomorelikelytorequirefoodstampsandothersortsofpublicassistance.RepublicansandDemocratsagreeonthis. Clearlythecloserwecometoreachingourfulleducationalcapacityasindividualsandasanationthelesslikelywearetobecomecriminalsandprisoners.Infactit'shardtothinkofasocialillthat'sunlikelytobeimprovedbymoreeducation. Butofcoursethere'snosuchthingasfreecollege.Thetaxpayershavetocomeupwiththemoney. Butwouldourcountrybebetteroffifallstudentshadarealopportunitytopushtheireducationalcapacitiestothelimit?Ofcourse.Therearelong﹣termsocialbenefitsthatideologyfoolsusintobelievingareunattainable.ButversionsofthesegoodsandothershavebeenachievedelsewhereandtheycouldbeachievedintheUnitedStatesaswell.Theymayrequiresomeremedy矫正补救toournation'sunfairredistributionofwealthinthedirectionofthealready﹣wealthybutmoreequalityinincomeandwealthwouldbeahealthystepaswell. SogoodforyouOregonandTennessee.Mostoftheworld'sproblemscomefromignoranceintolerancegreedandbackwardness.Educationisaveryimportantremedy. 62.What'stheproblemwiththecurrentcollegeeducation? A.Itcan'tpreparestudentsforapromisingfuture. B.Itfailstorecognizeandadmittalentedstudents. C.Itbecomeslessaccessibletostudentsfinancially. D.Itlacksasetofevaluatingcriteriaforstudents. 63.Accordingtothepassageagraduatewithonlyahighschooldegreewill. A.likelybecomeanestablishedworker B.havenomeanstomakealiving C.neverbeamemberofmiddleclass D.findithardtorealizeAmericanDream 64.WhatdoestheunderlinedpartinParagraph5probablymean? A.Poorpeopleareacostlyburdentosociety. B.Poorfamiliescan'taffordschooling. C.Educationforpoorchildrenisexpensive. D.Povertyisrelatedtohigheducationfees. 65.What'sthepurposeoftheauthorwritingthispassage? A.Todescribethelong﹣termplansforeducation. B.Toargueforfreehighereducation. C.Toexplaintheimportanceofeducation. D.Tofightagainstunfairwealthdistribution.
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. 修改在错的词下面画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仅限一词 2只允许修改10处多者从第11处起不计分. Nooneliveswithoutadream.Whetherthepathissmoothlyortoughweareonthepathtoachievingit.Asasenior3studentIhavethesamedreamlikemyclassmatesthatIcanbeadmittedtoanidealuniversity.InthepastthreeyearsIhavedoneeverythingIcanequipmyselfwiththatIhavelearntfrommyteachers.NotonlyhaveIenjoythepleasureofstudybutalsoIhavegotclosertomydream.Anxietyandpressurediscouragehimnowandthen.ThereforewiththeencouragementofmyteachersandclassmatesIthinkI'llmakeoutit. I'msurethatthereisstillalongwaytogotoachievemydream.NomatterhowchallengeditisI'llmakeitcometrue.AstheproverbsaysWheretherehasawillthere'saway.
两个不相同的奇数之和一定是合数．判断对错
﹣WeallknowfromyoungthatthePrimeMinisterQinhuiintheSongDynastyframedupGeneralYuefeitodeath. ﹣Yes.________. A.Abadbeginningmakesabadending. B.Aguiltyconscienceisaself﹣accuser. C.Abadthingneverdies. D.Amanisknownbythecompanyhekeeps.
平行四边形的面积一定它的底和高
根据短文内容从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余选项. HowtoBecomeaScientist Hereissomeadviceforstudentswhothinktheymightliketobecomescientists. 36Oneofthemostimportantthingsyoucandotobecomeagoodscientistispracticewatchingeverythingcarefully.Findacomfortablechairandputitinthemiddleofyourgardenorapark.Sitinthechairforthirtyminutesoranhour.Watchtheinsectsthatflypastorlandontheplants.Lookattheshapesofleavesandbranches.Listentothesoundsofinsects.37Useamicroscopetolookcloselyatinterestingobjects. Learneverythingyoucanaboutatopicthatinterestsyou.Supposeyou'dliketoexploreflowersbyusingamicroscope.Gotothelibraryandcheckoutsomeflowerbooks.SeewhatyoucanfindontheInternet.Picksomeflowersandcarefullytakenthemapart.38Themoreyouknowaboutflowersfromreadingaboutthemandobservingthemthemoreyou'llunderstandwhenyoulookatthemwithamicroscope. Askforhelpfromaknowledgeableperson.Afteryou'velearnedeverythingyoucanonyourownasksomeoneelsetohelpwithquestionsyoustillhave.Maybethere'ssomeoneatanearbyschoolormuseumwhoknowsaboutinsectsspidersorsomethingelseyou'dliketolearnabout.39 Findascientisttotalktoorfindaplacewherescientificresearchisbeingdone.Ifyoustillwanttolearnmoreyoucanfindascientisttotalktoatanearbyuniversityorresearchstation.40Explainwhatyou'reinterestedin.Askifyoucanscheduleatimetovisit.Mostscientistsarehappytotalktostudentswhosharetheirpassionforscience. A.Becomeanobserver. B.Youmaygoseekanswersfromhim. C.Writealetterorane﹣mailmessagetothescientist. D.ResearchyourquestionsusingtheInternetorlibrary. E.Seeifyoucanfindasightorsoundthatsurprisesyou. F.Useamicroscopetoseehoweverythingfitstogether. G.Beingascientististime﹣consumingandmentallydemanding.
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