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合成氨所需H2取自CH4,CH4和O2作用成CO2、H2(反应①),然而CH4和O2反应还能生成CO2、H2O(反应②),当有水生成时,H2O和CH4反应(反应③).下表 为三个反应在不同温度下的平...
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高三下学期化学《》真题及答案
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油中溶解气体分析时色谱仪的测量对象主要有
H2、CO、CO2、CH4、C3H8、C3H6、C2H2
H2、CH4、C2H4、C2H6、C2H2
H2、CO、CO2、CH4、C2H4、C2H6、C2H2
H2、O2、CH4、C2H4、C2H6、C2H2
高炉煤气主要成份有COCO2O2CH4H2
1合成氨工业对国民经济和社会发展具有重要的意义某合成氨工业中氢气由天然气和水反应制备其主要反应为CH
高炉冶炼过程的还原剂有
CO2、CH4、H2
CO、CH4、H2
CO、CO2、H2
CO、H2
气化炉出口粗煤气半分析内容包括
煤气中CO2与O2含量
煤气中CO2与CH4含量
煤气中CO与O2含量
煤气中CO与H2含量
燃料中的挥发物质随温度不断升高而挥发出来这些气体大部分是可燃的如 COH2CH4H2S等只有少部分是
水煤气不仅是合成氨的原料气也是合成烃及其化工产品的原料1直接水煤气燃料电池中通COH2的极为电池的▲
高炉煤气中可燃气体有
CO、H2、CH4;
CO、H2、N2;
CO、CO2、N2;
CO2、H2、N2。
焦炉煤气中属于可燃成分的有H2COCH4O2CmHn等
比较下列各组热化学方程式中ΔH的大小关系1Ss+O2g===SO2gΔH1Sg+O2g===SO2g
按要求回答下列问题1已知在常温常压下①2CH3OHl+3O2g===2CO2g+4H2OgΔH.=-
加热焦炉用的焦炉煤气的中含有H2COCH4CO2N2O2等
氢气H2一氧化碳CO辛烷C8H18甲烷CH4的热化学方程式分别为H2g+1/2O2g=H2Ol△H=
H2(g)
CO(g)
C.8H18(l)
CH4(g)
已知CH4g+2O2g==CO2g+2H2O1△H1=―Q1KJ/mol2H2g+O2g==2H2O
放出的热量为(0.4Q1+0.05Q3)KJ/mol
放出的热量为(0.4Q1+0.05Q2)KJ/mol
△H2 > △H3
△H2 <△H3
壳牌煤气化工艺装置正常运行时对CH4控制操作增加H2O/O2比结果将是1蒸汽产 量增大2CO2含量升
1,2;
1,4;
2,3;
3,4
特征气体组分CH4/H2=0.8时CH4/H2比值编码为
1
2
-1
特征气体组分CH4/H2≥3时CH4/H2比值编码为
1
2
3
气化炉出口粗煤气半分析内容不包括
煤气中CO2与O2含量
煤气中CO2与CH4含量
煤气中CO与O2含量
煤气中CO与H2含量
水煤气不仅是合成氨的原料气也是合成烃及其化工产品的原料1直接水煤气燃料电池中通COH2的极为电池的▲
在同温同压下等质量的CO2H2HClCH4所占体积最大的是HCl
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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. SinceIwasakidI'veconsidereddifferentjobIwouldliketodo.FirstIwantedtobeafiremanwhoseuniformlookedsocoolly.ThenwhenIwasinthefivegradeIwantedtobeateacherbecauseIlikedmyEnglishteachertoomuch.WhenIstudiedchemistryhighschoolIreconsideredmggoalordecidedtobeadoctor.Theyweretworeasonsforthedecision.OnewasthatIwasamazingatthefactthatasickpersoncouldfeelmuchmorebetterafterseeingadoctor.AndtheotheristhatIwantedtohelppeopleinneed.
Chineseresearchershave1soccessfulgrownandharvestedriceinthedesertofDubai迪拜afterdevelopingastrain品种which2allowthecroptogrowinsaltwater. Ateamofscientists3leadbyChina'sFatherofHybridRice.YuanLongpinghavealreadystartedgrowingthecropinthediluted稀释的seawaterathomeandarenowbringingthetechniquetotheMiddleEast. ThebigharvestofricelastyearinthesuburbsofDubaifarexceededscientists'expectationsaccordingtoareportbyXinhuaNewsAgency.Thehighoutput7500kilogramsperhectare公顷comparedwiththe4globeaverageof3000kilogramsperhectare﹣hasencouragedscientiststoexpandtheprject.They5plantosetupa100﹣hectareexperimentalfarminDubailaterlastyear.Theywillputitintoregularusethisyearandthenstartexpandingafter2020. TheDubaiprojectisacommperationbetweenChina'sSeaRiceResearchandDevelopmentcenterwiththeprivateOfficeofSheikhSaeedBinAhmedAlMaktoum.Thetwopartieshavesignedan6agreetopromoteseawaterariceacrosstheArabworldtoreducetheriskoffoodshortagesinthefuture. Whilescientistsinsomecountries7watershortagesareaseriousconcernhavebeendevelpingdesalination脱盐techniquestochangeseawaterforuseinagricultureChinahasbeenworking8developstainsofsaltresistantricefrothepastfourdecades. Although9isnotyetclearhwotheDubaiprojectwillbeabletosecureenoughfreshwatertodiluteseawater10lare﹣scalericeplantingChinesescientistshavealreadystartedgrowingitclosertohomeonacommercialscale.
AfterphotographerMonniMust'sdaughterMiyadiedthesadmotheradoptedherblackdogBillyBean.AsBillybecameincreasinglyweakthethoughtofitsdyingwasjustmorethanMustcouldhandle.Soshedecidedtoclonethedog.IfearedeveryonewasgoingtoforgetMiyashesaidandmyotherdaughtersthoughtIhadcompletelylostmymind. Billy'scellswereshippedtoViaGenPetsaTexascompanythatprovidesthecloningservice.Withmorethan﹩50000Mustpickedupanewpuppy.Thedoghasarealsoulandiseverythingmydaughterwas﹣funsocialandkindshesaid.IfeelthatIstillhavethattouchableconnectionandnotjustaspiritualconnection. Cloninganimalsishardlynew.ButtherecentnewsthatsingerBarbraStreisandhadclonedherdoggrabbedinternationalheadlines.PeoplefortheEthicalTreatmentofAnimalsPETApresidentIngridNewkirkissuedastatementsayingshewouldlovetotalkheroutofcloningnotingthatmillionsofwonderfuldogsaregettingoldinanimalshelterseveryyearordyinginterrifyingwayswhenabandoned. Normallyadoctortakesatissuebiopsy组织活检apieceofskinandmuscleaboutthesizeofapencileraserfromthedog.Thenextstepistotakeaneggcellfromadonordogremovetheegg'snucleusandinsertDNAfromthepettobecloned.Whenanembryo胚胎developsitistransplantedinthebodyofamotherdog. Inthebasiccloningprocedurescientiststakeanentireadultcellandputitintoaneggthat'sbeenrelievedofitsownDNA.Theresultingembryoisaclone.Howeverinmanyanimalsonlyonein100clonedembryoseverleadstoalivebirth.SomeembryosdieintheIVFdishorinthemothersbodies.Ofthosethatarebornafewsufferfromabnormalitiesandquicklydie.Besidespetcloningdoesn'tmeancopyingeverythingofyourbelovedpets. 1WhydidMustdecidetocloneBillyBean? A.Shefeltalonewithoutitscompany. B.Herworkexperienceinspiredhertodoso. C.Shewantedtokeepherdaughter'smemory. D.Herfamilyencouragedhertogetanewdog. 2What'sNewkirk'sattitudetowardspetcloning? A.Supportive. B.Negative. C.Objective. D.Uncertain. 3WhatdoesParagraph4mainlytalkabout? A.Howdogcloningworks. B.Theachievementsindogcloning. C.Thedisadvantagesofpetcloning. D.Howtosupportanimalprotection. 4Thelastparagraphimpliesthatanimalcloning. A.iswidelyacceptednow. B.hasaveryhighfailurerate. C.givespetownersfalseinformation. D.hasmadeabreakthroughinrecentyears.
假定你是李华你的英国笔友Robert最近给你发了一封内容如下的电子邮件请你根据邮件内容和写作要点用英语给他回复 DearLiHua I'mreadyupsetatpresentIhadmanyfriendsbutnownoneofthemwanttotalktome.atlunchtimenobodylikestoshareatablewithme.Ifeelreallypuzzledandlonely.AndIcan'tunderstandwhytheyaretryingtoavoidme.Wouldyoupleasegivemesomeadvice?Thankyou. Robert 写作要点:1.给他的处境表示理解2.给他提出合理的建议3.愿意为他继续提供帮助 注意:词数100左右可以适当增加细节以使得行为连贯开头和结尾已经为你写好不计入总词数量 DearRobert
IsFreshAirReallyGoodforYou? Weallgrewuphearingpeopletellustogooutandgetsomefreshair.1AccordingtorecentstudiestheanswerisabigYESiftheairqualityinyourcampingareaisgood. 2Iftheairyou'rebreathingisclean﹣whichitwouldbeifyou'reawayfromthesmogofcities﹣thentheairisfilledwithlife﹣givingenergizingoxygen.Ifyouexerciseoutofdoorsyourbodywilllearntobreathemoredeeplyallowingevenmoreoxygentogettoyourmuscles肌肉andyourbrain. Recentlypeoplehavebegunstudyingtheconnectionbetweenthenaturalworldandhealing治愈.3Intheseplacespatientscangotobenearnatureduringtheirrecovery.Itturnsoutthatjustlookingatgreengrowingthingscanreducestresslowerbloodpressureandputpeopleintoabettermood情绪.Greeneryisgoodforus.HospitalpatientsWhoseetreebranchesouttheirwindowarelikelytorecoveratafasterratethanpatientswhoseebuildingsorskyinstead.4Itgivesusagreatfeelingofpeace. 5Whilethesun'srayscanageandharmourskintheyalsogiveisbeneficialVitaminD.TomakesureyougetenoughVitaminD﹣butstillprotectyourskin﹣putonsunscreenrightasyouheadoutside.Ittakessunscreenaboutfifteenminutestostartworkingandthat'splentyoftimeforyourskintoabsorbaday'sworthofVitaminD. A.Freshaircleansourlungs. B.Sowhatareyouwaitingfor? C.Beinginnaturerefreshesus. D.Anothersidebenefitofgettingfreshairissunlight. E.Butisfreshairreallyasgoodforyouasyourmotheralwayssaid? F.Justasimportantlywetendtoassociateairwithhealthcare. G.AllacrossthecountryrecoverycentershavebegunbuildingHealingGardens.
ThepolarbearisfoundintheArcticCircleandsomebiglandmassesasfarsouthasNewfoundland.Whiletheyarerarenorthof88°thereisevidence1theyrangeallthewayacrosstheArcticandasfarsouthasJamesBayinCanada.Itisdifficulttofigureoutaglobalpopulationofpolarbearsasmuchoftherangehasbeen2poorstudied;howeverbiologistscalculatethatthereareabout20000﹣25000polarbearsworldwide. Modernmethods3trackingpolarbearpopulationshavebeenemployedonlysincethemid﹣1980sandareexpensive4performconsistentlyoveralargearea.InrecentyearssomeInuitpeopleinNunayut5reportincreasesinbearsightingsaroundhumansettlementsleadingtoa6believethatpopulationsareincreasing.Scientistshaverespondedby7notethathungrybearsmaybecongregating聚集aroundhumansettlementsleadingtotheillusion错觉thatpopulationsare8highthantheyactuallyare.Of9nineteenrecognizedpolarbearsubpopulationsthreearedecliningsix10bestableoneisincreasingandninelackenoughdata.
NeedaJobThisSummer? Theprovincialgovernmentanditspartnersoffermanyprogramstohelpstudentsfindsummerjobs.Thedeadlinesandwhatyouneedtoapplydependontheprogram. Notastudent?Gotothegovernmentwebsitetolearnaboutprogramsandonlinetoolsavailabletohelppeopleunder30buildskillsfindajoborstartbusinessesallyearround. JobsforYouth Ifyouareateenagerlivingincertainpartsoftheprovinceyoucouldbeeligible符合条件forthisprogramWhichprovideseightweeksofpaidemploymentalongwithtraining. Whoiseligible:Youth15﹣18yearsoldinselectcommunities社区. SummerCompany SummerCompanyprovidesstudentswithhands﹣onbusinesstrainingandawardsofupto$3000tostartandruntheirownsummerbusinesses. Whoiseligible:Studentsaged15﹣29returningtoschoolinthefall. StewardshipYouthRangerProgram YoucouldapplytobeaStewardshipYouthRangerandworkonlocalnaturalresourcemanagementprojectsforeightweeksthissummer. Whoiseligible:Studentsaged16or17attimeofhirebutnotturning18beforeDecember31thisyear. SummerEmploymentOpportunities机会 ThroughtheSummerEmploymentOpportunitiesprogramstudentsarehiredeachyearinavarietyofsummerpositionsacrosstheProvincialPublicServiceitsrelatedagenciesandcommunitygroups. Whoiseligible:Studentsaged15orolder.Somepositionsrequirestudentstobe15to24orupto29forpersonswithadisability. 1WhatisspecialaboutSummerCompany? A.Itrequiresnotrainingbeforeemployment. B.Itprovidesawardsforrunningnewbusinesses. C.Itallowsonetoworkinthenaturalenvironment. D.Itoffersmoresummerjobopportunities. 2WhatistheagerangerequiredbyStewardshipYouthRangerProgram? A.15﹣18. B.15﹣24. C.15﹣29. D.16﹣17. 3Whichprogramfavorsthedisabled? A.JobsforYouth. B.SummerCompany. C.StewardshipYouthRangerProgram. D.SummerEmploymentOpportunities.
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AmonthagoIbrokeanail.Myothernailslookedamazingbutnowonewasamess.ClearlytherewasnopointinkeepingtheotherssoIlookoutthenailscissorstocutthemalloff. WhatareyoudoingMom?mydaughtercriedyournailslookgreat!Don'tcutthem! Butthey'reruinedIsaidwavingthebrokenoneinherface. They'renotruinedshesaid.youstillhaveninenailsleft! Ihesitatedwiththescissorsstillinmyhand.Mynailscertainlyweren'tperfectanymoreandtheoppositeofperfectisruinedright?ImeanthisishowIthinkaboutmostthings:it'sallornothing.Takemyfinancesforexample. Icanspendweeksbeingsensibleandbuyingonlyessentialitemssuchasfoodformyfamily.AndthenonedayI'llseesomethingexpensivethatIreallylikeandbuyit.ThenIthinktomyselfwellIalreadyspent100dollarsonthatdresslastweeksoImayaswellspend50dollarsonthislipstick口红andgiveupsavingentirelyI'vethoughtaboutwhyIactthiswaybutIdon'tknowwhatcausesthisbehavior.Iseemtogofromgoodtocompletedisasterinamatterofmoments.Mybrainonlyseesperfectordisasterwhichisextremelyunhelpful. Wehumansareneverjustgoodorbad﹣wearefarmorecomplex.Wehavewinsandwehavelossesandoccasionallytheyarehardtotellapart.Somepeopleunderstandthisinstinctively本能地whileothersstruggle.Formostofuslearningnottodothethingwe'reusedtorequireseffortanddiscomfort.Howeverweshouldremindourselvesthatwesometimesmakemistakesandthatthisdoesn'tmeanwe'vefailed.Weneedtoacceptthatthingswillsometimesgowrong. Indeedfailureispartoflife.Weallfalloccasionallyandwenormallygetstraightbackup.Andsowithmydaughter'swordsringinginmyearsIdecidedtokeepmyninenicenails.IfeelannoyedeverytimeIlookatmyhandsbutI‘mdeterminedtolivewithmychoice.It'saperfectexerciseinimperfection.MaybesoonI'llswitchoffmycomputerthenexttimeIfeellikeImightbuysomethingelseIdon'tneedalthoughImayneedmydaughtertheretoguidemeagain. 1Whydidtheauthorwanttocutoffhernails? A.Shegotallofthemruined. B.Shedidn'tlikelongnailsatall. C.Shedidn'twanttohaveimperfectnails D.Shewantedtopreventthembeingbroken. 2whatistheauthor'sproblemwithherlife? A.Sheisrathercrazyaboutshopping B.Shelooksatlifeinanextremeway C.Sheistoocarefulwithherfinances D.Sheisunwillingtochangehermind. 3Whatdoestheauthorthinkoffailure? A.Itisjustanormalpartoflife B.Itcanhelppeopletobestronger C.Itcancompletelydestroyourlife D.Itissomethingweneedtoovercome
MarkTwainisoneofthegreatestAmericanauthors.Hepublishedhismostfamousworksinthelaterdecadesofthe19thcenturywhentheUSwasstillbuildingaliterarytraditionforitself. Twaincreatedakindofwritingthatwasnamedlocalcolorliterature.Thetermmeansthatthewritingcontainsmanyreferencestothecultureofthestory'slocation.ForTwaininparticularhisworksarefilledwithreferencestothesouthernstatesoftheUSparticularlythelivesofthepeoplealongtheMississippiriver.Youfeelitinhisdescriptionsofplacesandthewayhemakeshischaractersspeak.ThisisclearinhismostfamousworkthenovelTheAdventuresofHuckleberryFinn. Thisstoryistheself﹣toldtaleofaboywholiveswithakindoldwoman.ShewantsHucktogrowupproperlyandtakesgoodcareofhim.HoweverlikehisfriendTomSawyerthefamouscharacterofanearliernovelbyTwainTheAdventuresofTomSawyerHuckdoesn'tliketofollowrules.Helivesthewayhewantstonotthewayotherpeoplewanthimto. DuringhisadventuresFinnrunsawayfromhome﹣togetawayfromschoolandhisnastyfather.AlongthewayhecreatesafriendshipwitharunawayslaveJim.TogethertheybuildthemostfamouschildhoodfriendshipinAmericanliterature. Eventhoughit'shismostfamousworkTheAdventuresofHuckleberryFinnisjustoneofTwain'smanyachievementsinliterature.He'salsoanauthoroffamousquotes.Aswithwordsbyother19thcenturyauthorslikeIrishPoetOscarWildeandIrishplaywrightGeorgeBernardShawmanywillhavereadwordswrittenbyTwaineveniftheydon'tknowhisname. Oneofhismostfamousquotescamefromaletterhesenttoanewspaperafterithadpublishedthathe'ddied.RumorsofmydeathTwainwrotearegreatlyexaggerated夸张. 1AccordingtothearticlewhatisthemainfeatureofMarkTwain'sworks? A.Theyaremostlyaboutchildren'sadventures. B.TheyareabouteverycultureacrosstheUS. C.Theyfocusonthelivesofupper﹣classAmericans. D.TheyfocusonthecultureofthesouthernstatesofAmerica. 2WhatcanwelearnaboutHuckfromthearticle? A.Helivesapoorlifewithhismother. B.Helovestobefreeandbehimself. C.Heissmartanddoeswellatschool. D.HerunsawaytofindhisfriendJim. 3WhatsimilaritydoesMarkTwainsharewithOscarWildeandGeorgeBernardShaw? A.Theyallstartedanewliterarytradition. B.Theyareallknownthroughouttheworld. C.Theyallproducedmanywell﹣knownquotes. D.TheyallcontributemuchtoAmericanliterature. 4What'sthearticlemainlyabout? A.MarkTwain'smostfamousnovel. B.Theoriginoflocalcolorliterature. C.WhyMarkTwainisagreatauthor. D.TheinfluenceofMarkTwain'sworks.
Asdataandidentitytheftbecomesmoreandmorecommonthemarketisgrowingforbiometric生物测量technologies﹣likefingerprintscans﹣tokeepothersoutofprivatee﹣spaces.Atpresentthesetechnologiesarestillexpensivethough. ResearchersfromGeorgiaTechsaythattheyhavecomeupwithalow﹣costdevice装置thatgetsaroundthisproblem:asmartkeyboard.Thissmartkeyboardpreciselymeasuresthecadence节奏withwhichonetypesandthepressurefingersapplytoeachkey.Thekeyboardcouldofferastronglayerofsecuritybyanalyzingthingsliketheforceofauser'stypingandthetimebetweenkeypresses.Thesepatternsareuniquetoeachperson.Thusthekeyboardcandeterminepeople'sidentitiesandbyextensionwhethertheyshouldbegivenaccesstothecomputerit'sconnectedto﹣regardlessofwhethersomeonegetsthepasswordright. Italsodoesn'trequireanewtypeoftechnologythatpeoplearen'talreadyfamiliarwith.Everybodyusesakeyboardandeverybodytypesdifferently. Inastudydescribingthetechnologytheresearchershad100volunteerstypethewordtouchfourtimesusingthesmartkeyboard.Datacollectedfromthedevicecouldbeusedtorecognizedifferentparticipantsbasedonhowtheytypedwithverylowerrorrates.Theresearcherssaythatthekeyboardshouldbeprettystraightforwardtocommercializeandismostlymadeofinexpensiveplastic﹣likeparts.Theteamhopestomakeittomarketinthenearfuture. 1Whydotheresearchersdevelopthesmartkeyboard? A.Toreducepressureonkeys. B.Toimproveaccuracyintyping. C.Toreplacethepasswordsystem. D.Tocutthecostofe﹣spaceprotection. 2Whatmakestheinventionofthesmartkeyboardpossible? A.Computersaremucheasiertooperate. B.Fingerprintscanningtechniquesdevelopfast. C.Typingpatternsvaryfrompersontoperson. D.Datasecuritymeasuresareguaranteed. 3Whatdotheresearchersexpectofthesmartkeyboard? A.It'llbeenvironment﹣friendly. B.It'llreachconsumerssoon. C.It'llbemadeofplastics. D.It'llhelpspeeduptyping. 4Whereisthistextmostlikelyfrom? A.Adiary. B.Aguidebook. C.Anovel. D.Amagazine.
Ifyou'veeverhadadogyouknowjusthowdeepaconnectionyoucandevelopwithman'sbestfriend.Butadog'slifeismuchshorterthanhumansabout12to15yearslongwhichmeanseverydogownerhastogothroughtheheartbreakingmomentwhentheirlovingtheirlovingpetpassesaway. Whynotmakeacloneofthatdogthen?ThisisthesolutionofferedbyaSouthKoreacompanySooamBiotechResearchFoundation.Thecompanyhasalreadysuccessfullyclonedatleast400dogsmostlyforUScustomersevers9inceitpioneeredthetechniquein2005.NowsooamBiotechhasintroduceditsbusinesstoUKdogownersaswellofferingthemdogsthatlookjustliketheirlostones. Tocloneadogresearchersfirstneedtotakeaskincellfromalivingdogoronethathasjustdied.Meanwhileanotherdogisselectedtosupplyanegg.ResearchersthenreplacetheDNAintheeggwiththatfromskincellandimplanttheeggintothewomb子宫ofafemaledog.Theegggrowsintoapuppyoverthefollowingtwomonths. Thewholeprocesstakeslessthanadaybutitcomesatashockinglyhighprice﹣around63000dollars.Butifyoucan'tafforditnowyoucanalsosavethecellinalaboratoryandaccessitatalaterdate. Howevermagicalascloningmightsoundthereisnoguaranteethatthecloneddogwillbeaperfectcopyoftheoriginalone.JustlikeidenticaltwinsofhumantheysharetheexactlysameDNAbuttherewillstillbesmalldifferencesbetweenthem.thespotsonaDalmatian斑点狗clonewillbedifferentforexampleInsungHwangheadofSooamBiotechtoldTheGuardian. Dogownerswillalsohavetoacceptthefactthatpersonalityisnotclneable.ApartfromgenespersonalityisalsodeterminedbyupbringingandenvironmentwhicharebothranoomelementsthatcloningtechnologiessimplycannotovercomeProfessorTomKirkwoodatNewcastleUniversityUKtoldTheTelegraph. Perhapsbringingourdogsbackbycloningisnotthebestwaytorememberthemafterall.KirkwoodadogownerhimselfpointedoutAnimportantaspectofourrelationshipwiththemiscomingtotermswiththepainoflettinggo. 1WhatservicedoesSooamBiotechResearcherFoundationoffer? A.Makingcopiesofpetdogs. B.Givingpetdogsidenticaltwins C.Helpingdogsgivebirthtomorepuppies D.Helpingdogownerslovetheirdogsmore 2Whichorderiscorrectinthedogcloningprocess? a.Aneggistakenfromanotherdog b.askincellistakenfromthepetdog c.Theegggrowsintoapuppyintwomonths d.Theeggisplacedinthewombofafemaledog e.TheDNAintheeggisreplacedbytheDNAfromtheskincell. A.a﹣d﹣b﹣e﹣c B.a﹣e﹣b﹣d﹣c C.b﹣a﹣d﹣e﹣c D.b﹣a﹣c﹣d﹣c 3Whatcanwelearnaboutdogclonignfromthepassage? A.ithasnotbeenputintopracticeuntilrecently B.itisverypopularamongUSandUKpetowner C.itmightnotgivetheownersanexactlysamedog. D.itisveryexpensiveandusuallytakeshalfayeartocomplete. 4WhatdoesKirkwoodthinkofdogcloning? A.Hedisagreeswithit B.Hesupportsit C.Heiscouriousaboutit D.Hethinksitunbelievable
IwasvisitingAustraliaafewweeksago.IknewIcouldn'tleavethesurfcapitaloftheworld1havingatrymyself.I2bookagroupsurflessonwhenIwasinByronBaywhichisareallypopularplacefor3professionsurferstogoandcatchsomewaves! Westartedoffwithawarmupbydoingsomestretchesandgoingforajogalongthebeach.Thenweall4liedownonoursurfboardsonthesandandpracticedjumpinguptothe5standposition.Afterthiswewerereadytogooutandtryitoutonthewater.Wellsurfingismuchharderthanitlooks﹣whenyouwatchpeoplefromthebeachtheymake6looksoeasy!Ihad7coupleoffailedattemptstostandupbeforeoneoftheinstructorscametohelpme. 8finalIstartedtogetthehangofitandbytheendofthelessonImanagedtostandupontheboardbymyself9wasaprettyawesomefeeling.NowI10waittotryitagainalthoughI'lldefinitelyneedtowearawetsuitifI'msurfingintheUK!
OnOct.212018China'srestaurantchain1serveShaxianCountysnacks小吃openeditsfirsteateryintheUnitedStatesbutclosedthreehoursafteritwasofficiallyopenedtothepublicasallthe2dishonthemenuweresoldout.Inthepastmonththenewly﹣openedrestaurantat81860thSt.Brooklyn3receiveanordereverytwominutesduringbusyhours.Whenthecustomerscanseethecookingprocesswithanopenkitchenintherestaurantitputs4theyateaseoverfoodsafety. NativetoShaxianCountytheShaxianDelicaciesrestaurantchainhasalreadybecome5greatsuccessinChina.NowthesesnackshavehitthestreetsofNewYorkCityandcaughtlocaltastebuds味蕾.Abasketofsteameddumplingsfor50centsdelicious6notexpensivethat'smychildhoodmemoriesoftheShaxiansnacks.saidLinLijuinvestoroftheShaxianDelicacies.7adapttothetasteofforeignerstheShaxianDelicacieshasnotonlymaintainedthe8traditionproductionskillsbutalsomademanyimprovements. WithitsgoodqualityandcompetitivepricetheShaxianDelicacieshasbroughtinover10billionyuan9annual.ActuallytheShaxianDelicaciesisnottheonlyfood10islovedbyforeigners.
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.NASA:TheHomeofAstronauts B.Space:TheFinalHomeworkFrontier C.Nature:AnOutdoorClassroom D.HUNCH:ACollegeAdmissionReform
Therewasasurveyofthepeoplewhowerebornfrom1980to2000askingthemwhattheirmostimportantlifegoalswere.Over80percentsaiditwastogetrich.1We'reconstantlytoldtodevotemoretoourworktopushharderandtoachievemore.We'regiventheimpressionthatthesearethethingsthatweneedtogoaftertohaveagoodlife.Butisthatthetruth?2 Butwhatifwecouldstudypeoplefromthetimewhentheywereteenagersallthewayintooldagetoseewhatreallykeepspeoplehappyandhealthy?TheHarvardStudyofAdultDevelopmentdidit.For75yearsthey'vetrackedthelivesof724men.Studieslikethisareextremelyrare.Almostallprojectsofthiskindfallapartwithinadecadebecausetoomanypeopledropoutofthestudy.3Ortheresearcherscan'tgettogether.Butthroughacombinationofluckandthepersistenceofseveralgenerationsofresearchersthisstudyhassurvived. Sowhathavetheylearned?Theconclusionisthatit'snotwealthorfamethatcounts. 4They'velearnedthreebiglessonsaboutrelationships.Firstlypeoplewhoaremoresociallyconnectedtofamilytofriendsandtocommunityarehappierandphysicallyhealthier.Thesecondisthatit'snotjustthenumberoffriendsyouhavebutthequalityofyourcloserelationshipsthatmatters.Andthethirdisthatgoodrelationshipsdon'tjustprotectourbodies.5 A.Theycanevenprotectourbrains. B.Tobecomefamouscamesecond. C.Orfundingfortheresearchdriesup. D.Thegoodlifeisbuiltwithrelationships. E.Itturnsoutthatbeinginconflictisbadforourhealth. F.Itisgoodrelationshipsthatkeepushappierandhealthier. G.Tobefranksometimeswealthandfamecanmakepeoplehappy.
OneafternoonIwenttopickupmymotherfromwork.1Ilookedoutsidethecarwindowtherewasasmallpark2Isawalittleboyrunningfreelyonthegrassashismotherwatchedfromashortdistance.Theboywouldthenfalltothegrass3andwithouthesitationorwithoutlookingbackathismotherrunasfastashecouldagainstillwithasmileonhisface4nothinghappened. Whentheyfalldownkidsdon't5theirfallingdownasafailurebut6theytreatitasalearningexperience7justanotherresultofoutcome.Theytryandtryagain8theysucceed.Theyhaven'tassociatedfallingdownwiththeword9yetthustheydon'tknowhowtofeelthestatewhichaccompaniesfailure.Sotheydon't10.Plustheyprobablythinktothemselvesthatit'sperfectlyokaytofalldownandthatit'snot11todoso.Inotherwordstheygivethemselves12tomakemistakessubconsciously. WhileIwas13bytheboy'spersistenceIwasequallytouchedbythe14inwhichheran.Witheachattempthelookedsoconfident…sonatural.Hisonlyaimwastorunfreelyandtodoitaseffectivelyashecould.Hewasjustbeingachild﹣justbeinghimself﹣beingcompletelyinthemoment.Hewasnotlookingforapprovalorwasnotworryingabout15someonewaswatching.Hewasn't16aboutbeingjudged.Hedidn'tseemtobebotheredby17thatmaybesomeonewouldseehimfall.Nowhat18tohimwastoaccomplishthetaskoractivity19tothebestofhisability. Ilearnedalotfromthat20andexperienceandhavesuccessfullybroughtthatlessonwithmeinmylife. 1A.Calling B.Working C.Waiting D.Hoping 2A.where B.which C.when D.what 3A.geton B.getup C.getoff D.getacross 4A.asif B.eventhough C.while D.sothat 5A.look B.refer C.regard D.prefer 6A.for B.also C.instead D.rather 7A.as B.in C.at D.for 8A.when B.until C.after D.before 9A.success B.strike C.misfortune D.failure 10A.loseheart B.losetheirheart C.breakheart D.takeheart 11A.right B.suitable C.wrong D.impossible 12A.help B.permission C.order D.right 13A.impressed B.interested C.touched D.surprised 14A.means B.speed C.method D.manner 15A.if B.where C.whether D.unless 16A.concerned B.cared C.angry D.crazy 17A.thetime B.thefact C.theplace D.thereason 18A.surprised B.happened C.appealed D.mattered 19A.byhand B.outofhand C.athand D.fromhand 20A.movement B.opinion C.memory D.observation
Let'sfaceit﹣﹣﹣you'reattachedtoyourphone.YouuseittocommunicateplaygamesandsurftheInternet.Butthere'sagreatwaytomakeyoursmartphonealife﹣enrichingdevicewithouthurtingyoureyes.Checkouttheworldofpodcasts. ThinkofpodcastsasYouTubechannelsforlistenersthatyoucandownloadtoyourphone.What'ssoexcitingaboutthat?Wellyoucanfindalotofamazingshows!Whateveryoufindthatcatchesyourattentiononethingissure﹣﹣﹣listeninginspirestheimagination.Becauseyoucanonlylistentoashowandnotseeityouhavetopaymoreattention.Thereforeyourimaginationhasthepotentialtobecomestrongerandmorevividasaresult. Podcastsallowyoutoexperiencetheworldfromvariousangles.TakeAmerica'sNPRandBritain'sBBCforexample.Bothhaveproducedseveralpodcasts.Bylisteningtothemyoucanlearntoappreciateculturaltolinguisticdistinctions.Choosewhatyoulike.Intheendit'syourdevice﹣﹣﹣yougettodecidewhoinfluencesyou! Sowhat'soutthere?Lots!Sincepodcastsarecreatedforveryspecificaudiencesyou'resuretofindonethatinterestsyou.PodcastshadbeenaroundformorethanadecadeandonethatreallyputpodcastinginthespotlightiscalledSerial.It'sintheformofastorybrokenupoverseveralweekscompletewithcliffhangers.Ormaybeyoulikelisteningtopeoplediscussinterestingtopics.MypersonalfavoriteisWhiteHorseInn.Ifyou'reafanofinformativespeechessubscribetooneofthemanyTEDtalkspodcasts.Thereareseverallanguage﹣learningpodcaststoolikeESLPod.Thelistgoeson.Ifyou'renotsurewheretostartlookuptoppodcastsandgiveoneoftheirrecommendationsatry. Whetheryou'reridingabusexercisingorjustrelaxingputonsomeheadphonesandputyourlisteningskillstothetest.DownloadapodcastAppsubscribetoafewandgetlistening.Orbetteryetifyouhaveanideaforapodcastwhynotproduceoneyourself! 1Paragraph2mainlytellsuspodcastshelp. A.tomakeyourlifemoremeaningful B.todevelopyourimagination C.toimproveyourlisteningability D.toknowtheworldbetter 2Paragraph3isdeveloped. A.bygivingexamples B.bymakingcomparisons C.bygivingdetailedfacts D.bygivingcausesandeffects 3Fromthetextitcanbejudgedthat. A.youcanmakeprogressbyjustdownloadingapodcastApp B.Serialisalisteningprogramtellinginterestingstories C.WhiteHorseInnisaprogramthatdiscussesdulltopics D.peoplecanbetaughttolearnallkindsoflanguages 4Thepurposeofmentioningyourphoneatthebeginningofthetextis. A.tointroducethetopic B.togiveyoumoreevidence C.totalkaboutthefunctionofphones D.tomakethetextinformative
阅读下面短文根据所给情节进行续写使之构成一个完整的故事. HernamewasMrs.Thompson.Andasshestoodinfrontofthe5thgradeclassontheveryfirstdayshelookedatherstudentsandsaidthatshelovedthemallthesame.ButthatwasimpossiblebecausethereinthefrontrowwasalittleboynamedTeddyStoddard.Mrs.ThompsonhadwatchedTeddytheyearbeforeandnoticedthathedidn'tplaywellwiththeotherchildrenthathisclothesweremessyandthatheconstantlyneededabath.ShepaidnoattentiontoTeddy. Howeverwhenshereadhisfileshewasinsurprise.Teddy'sfirstgradeteacherwroteTeddyisabrightchildwithareadylaugh.Hedoeshisworkneatlyandhasgoodmanners…heisajoytobearound.HissecondgradeteacherwroteTeddyisanexcellentstudentwelllikedbyhisclassmates.Butheistroubledbecausehismotherhasadeadlyillnessandlifeathomemustbeastruggle.HisthirdgradeteacherwroteHismother'sdeathhasbeenhardonhim.Hetriedtodohisbestbuthisfatherdoesn'tshowmuchinterest.Teddy'sfourthgradeteacherwroteTeddyiswithdrawnanddoesn'tshowmuchinterestinschool.Hedoesn'thavemanyfriendsandsometimessleepsinclass.BynowMrs.Thompsonrealizedtheproblemandshewasashamedofherself.Shethoughtthatshecouldmakeadifference. ShefeltevenworsewhenherstudentsbroughtherChristmaspresentswrappedinbeautifulpaperandtiedwithprettyribbonsexceptforTeddy's.Hispresentwasclumsilywrappedintheheavybrownpaperthathegotfromagrocerybag.Mrs.Thompsonopeneditinthemiddleoftheotherpresents.Someofthechildrenstaredtolaughwhenshefoundastonebracelet手镯withsomeofthestonesmissingandabottlethatwasone﹣quarterfullofperfume. Paragraph1: Mrs.Thompsonhervoicechokedupwithtearsthankedherstudentsfortheirpresents. Paragraph2: TenyearslaterTeddyinvitedMrs.Thompsontoattendhisweddingasgroom'smother.
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\划掉. 修改:在错的词下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l0处多者从第11处起不计分. LastSundaymyclassmatesandIwenttotheparkneartheschool.Canyouguessthatwedidthere?Wetakepartinavolunteeractivity.Wereachedintheparkatnineo'clockandthenwedividedintothreegroups.IwasinGroupThree.Allgroupshaddifferenttasks.GroupOneplantedtrees.GroupTwopickeduprubbishleavingbythetouristsandcleanedbenches.AgroupthatIwasinwipedalltheequipmentsintheChildren'sHouse.Allofusworkedhardly.Beforenoontheyfinishedworking.Eachofusfeltalittletiredandwewerehappybecausewehaddoneagooddeed.
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
已知等差数列{an}__差d≠0S7=35且a2a5a11成等比数列. 1求数列{an}的通项公式 2若Tn为数列{}的前n项和且存在n∈N*使得Tn﹣λan+1≥0成立求实数λ的取值范围.
假定你是李华暑假在伦敦学习得知当地美术馆要举办中国画展.请写一封信申请做志愿者内容包括: 1.写信目的; 2.个人优势; 3.能做的事情. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯; 3.结束语已为你写好.
Helicopterparentingdescribesastyleofraisingchildrenwhereparentsareoverprotectiveanddotoomuch.Itdescribesparentswhowatchovertheirkidsathomeandontheplaygroundlikeahelicopter.Todaymoderntechnologyallowsthesehelicopterparentstowatchoverfromevenfaraway.1 JulieLythcottwroteabooktitledBreakFreeoftheOverparentingTrapandPrepareYourKidsforSuccess.Inherbookshegivesreadersacloserlookatthisparentingstyle.2 JulieLythcottsayssheexperiencedtheeffectsofHelicopterparentingfirsthandwhensheworkedasdeanoffirstyearstudents.3Butmanywereunabletotakecareofthemselves.Theywereturningtoparentsconstantlyforguidanceforproblemsolvingtohavethemmakethechoiceaboutsomething. Sowhatcanparentsdoiftheywanttobreaktheoverparentinghelicoptercycle?4 ◆Stopsayingwewhenyoumeanyoursonoryourdaughter.Alltoooftenaparentwouldsayweareonthetravelsoccerteam.Wellnoyoursonisoryourdaughteris. ◆Stoparguingwithalloftheadultsinourkids'lives.Youneedtoteachyourkidstoadvocateforthemselves. ◆Stopdoingyourkids'homework. ◆5Teachthemtocrossthestreetmakeamealandremembertoputtheirownitemsintheirbackpackswhichbecomesabriefcaseoneday. Whenkidshavealltheskillstotakecareofthemselvestheywillbepreparedforadulthood. A.Fourwaysareofferedtostopwatchingoveryourchildren. B.Shealsoexplainswhyparentsshouldstopit. C.It'sagoodideatoencourageyourkidtodothethingshecanbyhimself. D.Theycangivetheirchildrendirectionsatanymomentfromanywhere. E.Buildyourkids'skills. F.Thefreshmenwereverysmartandaccomplishedonpaper. G.Yourkidiseagerformorefreedombutshouldyougiveittohim?
UniversityofPennsylvaniaresearcherssaythatforthefirsttimetheyhavelinkedsocialmediausetoincreasesindepressionandloneliness.Theideathatsocialmediaisanythingbutsocialwhenitcomestomentalhealthhasbeentalkedaboutforyearsbutnotmanystudieshavemanagedtoactuallylinkthetwo.TodothatPennresearchersledbypsychologistMelissaHuntdesignedastudythatfocusedonWeChatSnapchatandInstagram. Thestudywasconductedwith143participantswhobeforetheybegancompletedamoodsurveyandsentalongphotosoftheirbatteryscreensshowinghowoftentheywereusingtheirphonestoaccesssocialmedia.Wesetouttodoamuchmorecompletestudywhichattemptstoimitatereallife.Huntsaid. Thestudydividedtheparticipantsintotwogroups:Thefirstgroupwasallowedtomaintaintheirnormalsocialmediahabits.Theotherthecontrolgroupwasrestrictedto10minutesperdayonsocialmedia.Therestrictionswereputinplaceforthreeweeksandthentheparticipantsreturnedandweretestedforoutcomessuchasfearofmissingoutanxietydepressionandloneliness. Theresultsshowedaveryclearlinkbetweensocialmediauseandincreasedlevelsofdepressionandloneliness.UsinglesssocialmediathanyounormallydowouldleadtosignificantdecreasesinbothdepressionandlonelinessHuntsaid. SocialmediainviteswhatHuntcallsdownwardsocialcomparison.Whenyou'reonlineitcansometimesseemthateveryoneelseiscoolerandhavingmorefunandincludedinmorethingsandyou'releftoutHuntsaid.Andthat'sjustgenerallydiscouraging.Everyminuteyouspendonlineisaminuteyouarenotdoingyourworkornotmeetingafriendfordinnerorhavingadeepconversationwithyourroommate.Andthesereallifeactivitiesaretheonesthatcanencourageself﹣esteemandself﹣worthHuntadded. Peopleareontheirdevicesandthat'snotgoingtochangeshesaid.Butasinlifeabitofcontrolgoesalongway. 1Beforethestudywasconductedtheparticipantscompletedasurveyto. A.imitatepeople'sreallife B.linklonelinesstodepression C.showtheiruseofsocialmedia D.provesocialmediaisimportant 2Theresultsofthestudyshowedusinglesssocialmediawouldresultin. A.people'sfearofmissingout B.higherlevelsofdepression C.obviousreliefinloneliness D.lowerlevelsofhappiness 3InHunt'sopinionwhichactivitybenefitsmoretomentalhealth? A.Hikingoutwithfriends. B.Makingcomparisonwithothers. C.Playingcomputergamesinsparetime. D.Loggingontosocialmediaandhavingfun. 4Whichcanbethebesttitleofthepassage? A.AStudyonSocialMedia. B.HowtoImproveMentalHealth. C.PeopleAddictedtoSocialMedia. D.SocialMediaInfluencesMentalHealth.
WeworkwithCambridgeCountyCouncil'sParticipationTeamtocreateopportunitiesforyoungpeopletovisittheUniversityandlearnmoreaboutit.Thefollowingeventsarescheduledforthe2019/2020academicyear. SuperStarworkshops 12engagingworkshopsareplannedforyoungpeopleaged7to11.Thesehalf﹣dayvisitswillbeheldthroughouttheyearattimeswhenyoungpeoplearenotatschool.Ifparticipantscomplete8ofthe12workshopstheywillbeawardedthenationallyrecognisedSuperStarCrestAward. Pleasenoteworkshopswillonlyrunifwehaveasufficientnumberofattendeesusuallyaround3+participants. ExploreUniversityDays ExploreUniversityDaysareforyoungpeopleaged12﹣15.ParticipantsvisittheUniversityfortwodaysandengagewitharangeofuniversity﹣relatedworkshopsandotherfunactivities. Previousparticipantshaveengagedwiththefollowing: •VisitedtheSportsCentre •TookpartinaNeuroscienceworkshop •Enjoyedatwo﹣coursemealataUniversityCollege DateswillbeconfirmedinearlyDecember2019andascheduleforeventwillfollowintheNewYear. Eventsforpost﹣16students Ifyouarestudyingforyourpost﹣16qualificationsandareconsideringapplyingforCambridgeorwouldliketofindoutmoreaboutaspecificsubjectthefollowingeventsmightbeforyou: •UniversityandCollegeOpenDays •SubjectMasterclasses •CambridgeScienceFestival 1WhatcantheparticipantsdoinSuperStarworkshops? A.Tostayonlyhalfaday. B.Togetagift. C.Toenjoyafreemeal. D.Tovisitallthe12workshops. 2WhicheventisspeciallyforapplicantsofCambridge? A.SuperStarworkshops. B.TheNeuroscienceworkshop. C.ExploreUniversityDays. D.Eventsforpost﹣16students. 3Theeventsinthepassagemostprobablyaimto. A.introducesomecourses B.advertiseCambridgeUniversity C.enrichstudents'sparetimelife D.promotechildren'sinterestintouring
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.Thatreliefiscoupledwithadeepunderstandingofwhythesamepeoplekeepcomingbackformore:Connectingtothecommunity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.
人们常说的“幸福感指数”就是指某个人主观地评价他对自己目前生活状态的满意程度的指标常用区间[010]内的一个数来表示该数越接近10表示满意度越高.为了解某地区居民的幸福感情况随机对该地区的男女居民各500人进行了调查调查数据如表所示 1在图中绘出频率分布直方图说明将各个小矩形纵坐标注在相应小矩形边的最上面并估算该地区居民幸福感指数的平均值 2若居民幸福感指数不小于6则认为其幸福.为了进一步了解居民的幸福满意度调查组又在该地区随机抽取4对夫妻进行调查用X表示他们之中幸福夫妻夫妻二人都感到幸福的对数求X的分布列及期望以样本的频率作为总体的概率.
设函数fx=﹣x2+6x﹣4lnx在点Px0fx0处的切线方程为ly=gx若∀x∈0x0∪x0+∞都有<0成立则x0的值为.
Ifyou'reagamerwho'sconstantlygluedtoyourphoneitcouldbetimetoaskformedicalhelp. OnJune182018theWorldHealthOrganizationWHOofficiallylistedgainingdisorderasamentalhealthcondition1. Videogamingislikeanon﹣financialkindofgambiling赌博fromapsychologicalpoingtofviewMarkGriffithsaprofessorfromNottinghamTrentUniversityintheUKtoldtheAssociatedPressAP.Gamblersusemoneyasawayofkeepingscorewhilegamersusepoints. 2. peopleneedtounderstandthisdoesn'tmeaneverychildwhospendshoursintheirroomplayinggamesisanaddictotherwisedoctorsaregoingtobefloodedwithrequestsforhelpJoanHarveyaspokeswomanfortheBritishPaychologicalSocietytoldAP. 3Forexamplea21﹣year﹣oldChinesewomansurnamedWuinGuangdongrovincewentblindinoneeyeafterplayingthemobilegameKingofGloryforawholeday.OndayswhenIhavenoworkIusuallygetupat6ameatbreakfastandplayuntil4pmshetoldtheSouthChinaMorningPost.ThenI'lleatsomethinghaveanap小睡andplayuntil1am. Wuisn'talone.AccordingtoastudypublishedbyChinaYouthDailyaboutoneinfiveyoungChinesepeopeplayonlinevideogamesforatleastfourtofivehoursperday.4InApriltheMinistryofEducationissuedanoticeaskingChineseschoolsandparentstopreventstudentsfrombecomingaddictedtotheInternetandgame. Othercountrieshavealsotakenaction.5MeanwhileinJapansomemobilephoneshaveaspecialmodeforchildrenthatletstheirparentscontrolwhatgamestheycandownloadandhowlongtheycanplay. A.Thismeansit'snowonthesamelistasothermentalillnesses B.Thankfullymeansureshavebeentakentodealwiththeproblem. C.Weoftenseepeoplearoundusplayinggamesontheirmobilephones D.InSouthKoreachildrenareforbiddentoplayvideogamesaftermidnight. E.WHO'smainworkistoimprovethementalhealthofindividualsandsociety F.Butifyoulosecontroloveryourgaminghabitsyou'llfaceseriousproblems. D.Howeveritdoesn'tmatterifyouplayyourfavoritegamenowandthen.
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