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已知在x，y轴上截距分别为3，﹣4的直线与x，y轴分别交于M，N两点，动点P在圆C（x+1）2+（y﹣1）2＝1上，则△MNP的面积取得最小值时，点P的坐标是 ．
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高二下学期数学《》真题及答案
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过定点P12的直线在x轴与y轴正半轴上的截距分别为ab则4a2+b的最小值为．
已知直线l的方程为-3x+2y=12那么直线l的斜率为在x轴上的截距为在y轴上的截距为.
已知抛物线y2=4x过其焦点F.的直线与抛物线交于
，
两点，过A.，B.分别作y轴的垂线，垂足分别为
，
，则|AC|+|BD|的最小值为（ ） A.4B.3C.2D.1
在x轴y轴上的截距分别是－23的直线方程是
2x－3y－6＝0
3x－2y－6＝0
3x－2y＋6＝0
2x－3y＋6＝0
若直线2x﹣y﹣4=0在x轴和y轴上的截距分别为a和b则a﹣b的值为
6
2
﹣2
﹣6
如图已知直线l1y=k1x+4与直线l2y=k2x﹣5交于点A.它们与y轴的交点分别为点B.C.点E
一晶面在xyz轴上的截距分别为a/3b/2c求出该晶面的米勒指数
一晶面在xyz轴上的截距分别为2a3b6c求出该晶面的米勒指数
目标函数z＝3x－y将其看成直线方程时z的意义是
该直线的截距
该直线在y轴上的截距
该直线在y轴上的截距的相反数
该直线在x轴上的横截距
已知直线mx＋ny＋12＝0在x轴y轴上的截距分别为－3和4则mn的值分别为____________
已知直线y＝－x＋5的倾斜角是直线l的倾斜角的大小的5倍分别求满足下列条件的直线l的方程.1过点P.
一个四方晶系晶体的晶面在XYZ轴上的截距分别为3a4a6c求该晶面的晶面指数
若直线2x﹣y﹣4=0在x轴和y轴上的截距分别为a和b则a﹣b的值为
6
2
﹣2
﹣6
5.00分在x轴和y轴上的截距分别为﹣23的直线方程是
2x﹣3y﹣6=0
3x﹣2y﹣6=0
3x﹣2y+6=0
2x﹣3y+6=0
已知直线x＋y＋3＝0则直线的斜率为________在x轴上的截距为________在y轴上的截距为
若过定点P12的直线在x轴与y轴正半轴上的截距分别为ab则a·b的最小值为.
已知直线l的方程为x+my﹣2m﹣1=0m∈R.且m≠0.1若直线l在x轴y轴上的截距之和为6求实数
已知△ABC的顶点C.在直线3x﹣y=0上顶点A.B.的坐标分别为4205.Ⅰ求过点A.且在xy轴上
已知直线a＋2x＋a2－2a－3y－2a＝0在x轴上的截距为3则该直线在y轴上的截距为_______
分别求出适合下列条件的直线方程Ⅰ经过点且在x轴上的截距等于在y轴上截距的2倍Ⅱ经过直线2x+7y－4
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Mr.PeterJohnsonagedtwenty﹣threebattledforhalfanhourtoescapefromhistrappedcaryesterdaywhenitlandedupsidedowninthreefeetofwater.Mr.Johnsontooktheonlyescaperoute﹣﹣throughtheboot行李箱. Mr.Johnson'scarhadfinishedupinaditch沟渠atRomneyMarsinKentafterskiddingoniceandhittingabank.FortunatelythewaterbegantocomeinonlyslowlyMr.JohnsonsaidIcouldn'tforcethedoorsbecausetheywerejammedagainstthewallsoftheditchanddarednotopenthewindowsbecauseIknewwaterwouldcomefloodingin. Mr.JohnsonasweetsalesmanofSittingHomeKentfirsttriedtoattracttheattentionofothermotoristsbysoundingthehornandhammeringontheroofandboot.Thenhebeganhisstruggletoescape. LaterhesaidItwasreallyahalfpennythatsavedmylife.ItwastheonlycoinIhadinmypocketandIusedittounscrewthebackseattogetintotheboot.Ihammereddesperatelywithahammertryingtomakesomeonehearbutnohelpcame. Ittooktenminutestounscrewtheseatandafurtherfiveminutestoclearthesweetsamplesfromtheboot.ThenMr.Johnsonfoundawrenchandbegantoworkonthebootlock.Fifteenminutespassedby.ItwastheonlychanceIhad.FinallyitgavebutassoonasImovedthebootlidthewaterandmudpouredin.Iforcedtheliddownintothemudandscrambledclearasthecarfilledup. HishandsandarmscutandbruisedMr.JohnsongottoBeckettFarmnearbywherehewaslookedafterbythefarmer'swifeMrs.LucyBates.TremblinginablankethesaidThatthirtyminutesseemedlikehours.Onlythetipsofthecarwheelswerevisiblepolicesaidlastnight.Thevehiclehadsunkintotwofeetofmudatthebottomoftheditch. 1Inwhichsectionofanewspapercanwereadthisarticle? A.Bookreview B.Newsreport C.Campuslife D.Continuedstory 2TheunderlinedsentenceinParagraph5Finallyitgavemeansthat. A.luckilythedoorwastornawayintheend B.atlastthewrenchwentbroken C.thelockcameopenafterallhisefforts D.thechancewaslostatthelastminute 3Itcanbeinferredfromthepassagethat. A.theditchwasalongaquietcountryroad B.theaccidenthappenedonaclearwarmday C.thepolicehelpedMr.Johnsongetoutoftheditch D.Mr.Johnsonhadatenderwifeandwaswellattended
Wehaveagrowingpopulationandtweneedmorefood.
TheMonkeesbupabout1970buthappilytheyreunitedinthemid﹣1980﹩.
WhilecheckingoutatthegrocerystoreInoticedawomanbehindme.Shewas1oneofshoppingcartswiththebasketinfront.Thebasket2justafewitemssomeapplesaloafofbreadsomecannedgoodsanda3ofcoral﹣coloredroses.I4toherthattheywereindeedverylovelyroses.ShesaidIreallydolovethemthey'remyfavorite5. WelljustasIwasleavingIheardhersaytothecashierYoucan6thebunchofrosesbackIreallycouldn't7them.Iturnedaroundandaskedherifshewould8metogetthemforher.She9herheadandsaidWhywouldyouwanttodothat?Youcertainlydon'thaveto.IrepliedthatIjustwantedto10sinceshelovedthemsomuch.Shestillseemed11.SoItoldher12shewouldallowmeto13themtohershewouldbedoingmeafavor.WithtearsinhereyesshesaidIreallydolovethem.Thanks.AsI14thecashierthemoneyfortherosesInoticedhewasalittle15aswell. OnthewayhomeIwasreminded16asongIhadhearddecadesagoandI'velovediteversince.Thesongis'BreadandRoses'.It'sabeautifulsongonmanylevelsandremindsusthatwe17needfoodbutweallalsoneed18. Alinefromthissongfitsthissituationperfectly.It19Heartsstarveaswellasbodies.Giveusbreadbutgiveus20too. 1A.driving B.holding C.dragging D.pushing 2A.held B.Put C.presented D.produced 3A.box B.bunch C.basket D.handful 4A.Showed B.commented C.introduced D.recommended 5A.smell B.shape C.color D.memory 6A.deal B.put C.pick D.come 7A.make B.collect C.manage D.afford 8A.allow B.advise C.want D.prefer 9A.nodded B.shook C.lowered D.raised 10A.partly B.especially C.specially D.merely 11A.puzzled B.shocked C.hesitant D.Regretful 12A.if B.but C.only D.just 13A.owe B.pass C.gift D.deliver 14A.charged B.awarded C.offered D.handed 15A.teary﹣eyed B.starry﹣eyed C.weary﹣eyed D.sharp﹣eyed 16A.of B.for C.to D.if 17A.notif B.notbut C.noteven D.notonly 18A.love B.share C.money D.beauty 19A.reads B.sings C.speaks D.shows 20A.goodness B.roses C.comfort D.medicine
WhenIpackedupmylifeandmovedfromthecomfortsofmylittlehometowntoWacoIrememberfeeling1lose.AllmyfriendsweresoexcitedtostarttheirownlivesbutIjustwasn'tsure2Iwasreadyforthatyet.Manythingsworriedme.ButIhidmyfearsandwhenthetime3finalcameIhuggedmymothergoodbyemadethetwo﹣hourone﹣waydrivefromCoppeltoWacoandsetupmynewroom. ForthefirstfewweeksIdidn'tmisshomeorreallyfeelanykindofemotionatallexcepttired.Therewassomuchformetolearn4Ihadn'thadtimetothinkaboutanything.Myenergy5directtowardsfiguringoutcampusadjustingtocollege﹣levelclassesandrememberingthenamesofeverynewpersonImet.Iexploredeverycorner6lookfortheperfectplacetostudy.Ilearnedtoset7IascheduleofgettinggroceriescleaningmyroomanddoingmylaundryonSundays. NowadaysinmysecondsemesterIfeellikeIhavealmostadapted8theuniversitylife.Thetransitionfromhighschooltocollegewasn't9difficultasmymindmademethinkitwouldbe.Oneofthebest10thingcollegehastaughtmeishowtobeindependent.
ItwasMother'sDaybuttheyoungmotherwasalittleunhappybecauseshewas800milesawayfromherparents.Inthemorningshephonedhermother1wishherahappyMother'sDayandhermothertoldheraboutthebeautifullilacs丁香inthegarden.2latethatdaywhenshetoldherhusbandaboutthelilacshesaidIknowwherewecanfindallthatyouwant.Getthechildrenandcomeon.Sotheywent3drivedownthecountryroads. Thereonasmallhilltheysawalotof4beautypurplelilacs.Theyoungwomanranquicklytoenjoytheflowers.Carefullyshepickedafewhereandafewthere.Ontheirwayhometherewasasmile5herface.ziliaoqun700292070 Whentheywerepassinganursinghome养老院theyoungwomansaw6oldgrannysittinginachair.Shehadnochildrenwithher.They7stopthecarandtheyoungwomanwalkedtotheoldwomanputtheflowersinher8handandsmiledather.Theoldgrannythankedheragainandagain.Shesmiledhappilytoo. Whentheyoungmothercamebacktohercarherchildrenaskedher9isthatoldgranny?Whydidyougiveourflowerstoher? Idon'tknowher10theymothersaid.Butit'sMother'sDayandshehasnochildren.IhaveallofyouandIstillhavemymother.Justthinkhowmuchthoseflowersmeanttoher.
他突然想到他们在捉弄他. theywereplayingatrickonhim.
AphotographthatonehastakenofoneselftypicallywithasmartphoneorwebcamanduploadedtoasocialmediawebsiteisthedefinitionofselfieintheOxfordEnglishDictionary.Infactitwasn'teveninthedictionaryuntilAugustoflastyear.Itearneditsplacetherebecausepeoplearenowsoobsessedwith对……痴迷selfies﹣wetakethemwhenwetryonanewhatplaywithourpetsorwhenwemeetafriendwhomwehaven'tseeninawhile. Butisthereanyscientificexplanationforthisobsession?WellyoushouldprobablyaskJamesKilneraneuroscientist神经系统科学家atUniversityCollegeLondon. Throughourlifetimewebecomeexpertsatrecognizingandinterpretingotherpeople'sfacesandfacialexpressions.IncontrastaccordingtoKilnerwehaveaverypoorunderstandingofourownfacessincewehavelittleexperienceoflookingatthem﹣wejustfeelthemmostofthetime. ThishasbeenprovedinpreviousstudiesaccordingtotheBB24C. Kilnerfoundthatmostpeoplechosethemoreattractivepicture.Thissuggeststhatwetendtothinkofourselvesasbetter﹣lookingthanweactuallyare.TofurthertesthowweactuallyperceiveourownfacesKilnercarriedoutanotherstudy.Heshowedpeopledifferentversionsoftheirownportrait﹣theoriginalonethathadbeeneditedtolooklessattractiveandonethatwasmademoreattractive﹣andaskedthemtopicktheversionwhichtheythoughtlookedmostlikethem.Theychosethemoreattractiveversion. Butwhatdoesitsayaboutsettles?Wellisn'tthatobvious?Selfiesgiveusthepowertocreateaphotograph﹣bytakingitfromvariousangleswithdifferentposesusingfilters滤色镜andsoon﹣thatbettermatchesourexpectationswithouractualfaces. Yousuddenlyhavecontrolinawaythatyoudon'thaveinnon﹣virtual非虚拟的interactionsKilnertoldtheCanada﹣basedCTVNews.Selfiesallowyoutokeeptakingpicturesuntilyoumanagetotakeoneyou'rehappywithheexplained. 1Whatisthepassagemainlyabout? A.Thedefinitionandfunoftakingselfies. B.Theexplanationofwhypeoplelovetakingselfies. C.Howtakingselfiesinfluencespeople'sdailylives. D.Howtointerpretpeople'sfacialexpressionsintheirselfies. 2TheunderlinedwordperceiveinParagraph5canbereplacedby. A.interpret B.beautify C.choose D.destroy 3AccordingtoKilnerpeopleliketakingselfiesprobablybecausetheythink. A.itisagoodchancetolearnmoreabouttheiractualfaces B.itisawaytorespondtoothers'facialexpressionscorrectly C.itenablesthemtointeractwiththeirfriendsinsocialmedia D.itallowsthemtosatisfytheirexpectationswiththeirappearances
我妈妈宁可我把注意力都放在学习上. MymotherwouldratherImoreattentionmystudy.
Withmoreforestsdhugequantitiesofgoodeartharebeingwashedawayeachyear.
CoitTower CoitTowerprovides360﹣degreeviewsofSanFranciscoandthebayincludingtheGoldenGateBridge.Themostfantasticviewscanbeseenfromtheobservationdeckwhichisreachedbyanelevator.Itcosts﹩7togetontheelevator.Itis4.9milesfromCoitTowertoGoldenGateBridge. CrissyField CrissyFieldaformerarmyairportlocatedsouthoftheGoldenGateBridgeinthePresidiowasrebuiltin2001andofferswidewalkingandcyclingtrailsbetweentheMarinaGreenandFortPoint.ItofferswonderfulviewsoftheGoldenGateBridgepicnicareasandasmallsandybeachwhichispopularwithfamilies.AlongCrissyFieldvisitorscanstopforlunchattheWarmingHuttheBeachHutCafeortheHouseofAir.DistancefromGoldenGateBridge2.4milesfromtheMarinaGreen. Fort堡垄Point ForacloseviewofthebridgevisitFortPointwhichisaCivilWartimebrickfortwhichcanbeenteredthroughtheMarineDriveparkatCrissyField.AlthoughFortPointneverhadanymilitary军事的actiontheGoldenGateBridge'schiefengineerJosephStraussredesignedthebridgetopreservethefortasafineexampleofsomekindofart.nDistancefromGoldenGateBridge1.2miles. LandsEnd LandsEndnearLincolnParkoffersaperfectviewoftheGoldenGateBridge.Visitorscanwalkalongapavedsidewalknearthe17thholeoftheLincolnParkMunicipalGolfCourse.Herethereareseveralbenchesandphotoopportunitiestopicturethebeautyofthebridge.DistancefromGoldenGateBridge3.0miles. 1Wherecanvisitorshaveapicnic? A.AtCoitTower. B.AtCrissyField. C.AtFortPoint. D.AtLandsEnd. 2WhydidJosephredesignthebridge? A.Toofferwidewalkingandcycling. B.Topicturethebeautyofthebridge. C.Totakeacloseviewofthebridge. D.Tosavethefortasanart. 3Whatisthepurposeofthetext? A.TointroducesomeplacestoviewGoldenGateBridge. B.TointroducesomegreatplacesinGoldenGateBridge. C.TocomparethefourfamousplacesinSanFrancisco. D.TointroducethehistoryofGoldenGateBridge.
DaniellaWridewasbrushingherdaughter'slongbrownhairwhenshenoticedthatwitheachcombmassesofthehairwerecomingout.ThatwasJanuary12017.Within20daysseven﹣year﹣oldGianessaWride'shairwascompletelygoneandherdoctorsaidthehairwouldnevergrowback.Gianessahadbecomeoneofthe6.8millionAmericanswithalopeciaanauto﹣immunediseasethatcauseshairloss. Alopeciaisn'tpainfulbutforkidswhosufferfromittheseverepaincomesfromstandingoutfromthecrowd.ForthemostpartthestudentsinGianessa'sfirst﹣gradeclassinSalemUtahwereunderstanding.ButtheoccasionaljokesofBaldymadeherfeellikeanabandonedchild.Ididn'twanthertofeelthatshewasn'tliketheotherkidshermothersaid.Itriedcoveringherbaldnessbuttheman﹣madehairwasuncomfortable. Thencomestheschool'straditionalCrazyHairDayinAprilagreatjust﹣for﹣funcelebrationwhereallthekidsandtheirparentscanexpresstheirwildsidesabit.DaniellaandGianessadecidedthatratherthanhideGianessa'sbaldnessundertheman﹣madehairtheywouldcelebrateit.Daniellaboughtscrapbook﹣stickerjewelsanddecoratedherheadwithflowereddesignsandevenadeer.TheyjustfitherpersonalityDaniellasmiled.She'ssolovely. OnthemorningofthecompetitionGianessawasnervous.Wouldherfriendsthinkitwasfunny?Howeverwithhermother'sencouragementshehadnothingtofear.ImpressiveGianessawasahitandawinnerofthecrazy﹣haircompetition.Gianessaisnowgladthatshedaredtogobare.IwassadatfirstwhenIlostallmyhairshetoldpeople.ButnowIlovebeingbald.Icandothingstomyheadthatotherkidscan't.I'mthinkingnowitmightbefuntodecoratemyheadwithsomecolorfulbutterfliesandflowers. 1WhywasGianessadifferentfromotherkids? A.Shewasbornbald. B.Shehadherheadfullyshaved. C.Shewastalentedinhairdesigning. D.Shesufferedfromhairloss 2HowdidothersreacttoGianessa'sdisease? A.Herdoctorwasquiteoptimistic. B.Hermothergaveherman﹣madehair. C.Herclassmateswereallconsiderate. D.Herschoolneverofferedherhelp. 3WhatcouldGianessadoontheCrazyHairDay? A.Shecouldshowherpersonality. B.Shecoulddecorateherhair. C.Shecouldshopscrapbook﹣stickers. D.Shecouldteaseothers. 4Whatisthemainideaofthetext? A.Theman﹣madehairbuiltupthegirl'sconfidence. B.Thegirlfacedherdiseaseinamostbeautifulway. C.Thecompetitionservedasawaytomakeachange D.Thediseasewascuredwithmother'sloveandcare.
Ihavemadegreatprogressinmath.IbegintounderstandanoldsayingNopainsnog.
Therehasbeenanoutpouringoflovefora23﹣year﹣olddisabledwomanwhosedogwaskilledinfrontofherwhileagroomer美容师triedtotrimitsclaws. CallsandemailscamefromasfarawayastheUpperPeninsulaandArizonaaswellasOaklandandMacombcountiesofferingLaurieCrouchwhousesawheelchairbecauseofmultiplesclerosis硬化症everythingfromdogstomoneysuchasthatfromJasonDalyofRosevillewhosaidIwouldliketobuyheranewdog. AstoryaboutthedeathofCrouch'spetGoochwasprintedonthefrontpageofMacombDaily.CrouchsaidagroomertiedGoochupwithacollarandthensheandamansatonthedogtotrim修剪itsnails.Goochdiedafteroneclawwastrimmed. CrouchyelledatthegroomertostopwhenshesawGoochwasstrugglingtobreathebutshesaidshewasignored.IfIcouldhavewalkedIwouldhaveputmyhandsonherandpulledheroffmydogandphysicallystoppedherbutIcan'tdothat.GoochwasnotatrainedserviceanimalbutnaturallyhelpedCrouchbypickingupthingsforher. Thiscaseisabsoluteanimalabuse虐待LarryObrechtdivisionmanageroftheOaklandCountyAnimalShelterinAuburnHillssaid. PeoplewhoreadthestorycontactedOaklandPresstoofferhelp.AmessagefromRebeccaAmettofGigglesNWigglesPuppyRescueinRosevillesaidWehavepuppiestodonateandwanttohelptheyoungwomanwholostherservicedog. WhenGoochwaswithmeIwashappyCrouchsaidIthinkIcanbehappyagainbutnoanimalcanreplaceGooch.There'snevergoingtobeanotherGoochouttherebutIthinkIwillfindadogthatcanbringmejoyagain. 1Peoplecalledandemailedto. A.givetheirangryvoicetothegroomer B.offerhelpandcaretoLaurieCrouch C.tellCrouchhowtopunishthegroomer D.offeracureforCrouch'sdisease 2Goochdiedmainlybecause. A.thegroomerwascareless B.thegroomerdidn'tknowhowtotrimthedog'snails C.thegroomersatonthedogwithanotherman D.thedogwaswearingacollar 3WhatdoweknowaboutCrouch'sdog? A.Itwasaspeciallytrainedservicedog. B.Itwastrainedtodomanythingsforpeople. C.ItwasCrouch'sonlyfriend. D.ItcouldoffersomehelptoCrouch. 4Whatdoesthepassagemainlytellus? A.Adisabledwoman'sservicedog. B.Acruelgroomerkilledadisabledwoman'sdog. C.People'sloveforadisabledwomanwholostherdog. D.Adisabledwomanlovestohavethedogascompany.
Heenteredtheroomwithoutp.
他们谈起话来就好像长时间的老朋友一样. Theytalkedasiftheyoldfriendsforalongtime.
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. Manychildrentakewhattheirparentsdoforthemforgranted.Theyhaven'trealizedthemeaningofbeinggrateful.Buttheyalwaysgetangrywiththeirparentbecausetheydon'tgetwhattheywant.Myfriendoncetoldmenewsthatalittlegirlwentoutofthehouseandrefusetoreturnhomeasherparentsdidnotgiveherenoughpocketmoney.Iwassoshockingtohearit.IwouldneveraskmuchfrommyparentsbecauseIknewitwasnoteasyforhimtomakealiving.AndIalwaysfeelsothankfulforthattheyhaveofferedtome.IfsomeonewhogivesmeahandwhenIaminneedIwillrememberhimandifIrealhaveachanceIwillpayhimback.Inshortitisagratefulheartthatmakesusbecomekindpeopleandcreateaharmoniousenvironment.
Hefoundhimself包围bykindness.
中华传统文化蕴含着很多科学知识．下列说法错误的是
Ifyouaskmostpeoplewhatwatertasteslikethey'llprobablytellyouthatwaterhasnotasteandtheymaygiveyouafunnylook.Butifyouwereafruitflyaskinganotherfruitflythatquestionmighthaveadifferentanswer. Toafruitflywaterhasataste.Scientistswanttoknowhowthefruitflyknowswaterbecausethisinformationmayhelpinlearninghowotheranimalsmanagetousewaterintherightway.Waterisveryimportanttolifebuttoomuchortoolittlecanbedeadlytoalivingcreature.Sobyunderstandinghowthefruitflytasteswaterresearchersmaylearnmoreaboutotherlivingthings. AccordingtothenewstudyaproteincalledPPK28makesitpossibleforaflytotastewater.Proteinsbuildcellsandtissuesfightdiseaseandcarrymessagesbetweencells.It'snotsurprisingthataproteinisresponsibleforthefruitfly'sabilitytotastewater. ThePPK28proteinispartofalargerfamilyofsimilarproteins.Oneoftheserelatedproteinsisusedbymammalsincludinghumanstotastesalt.Scientistshavenotfoundaproteinthatenableshumanstotastewater.IntheexperimentCameronandhisteamcomparednormalfruitflieswithfruitflieswhosetastecellshadhadbeendisabled.ThefruitfliesweregivenaspecialchemicalthatwouldglowwhentheflyusedthePPK28protein.Thenthescientistsledthefliestowater.WhenthenormalfliestastedthewaterthePPK28proteinlitup﹣showingthatitwasinuse.Thefruitflyinparticularissointerestingthatsomescientistsarehardatworkcreatingacompletemapofthefruitflybrain.Thismapwillshowallofafly'sneuronsandhelpscientistsunderstandhowtheneuronsworktogether. 1Howdomostpeoplefeelwhenaskedthetasteofwater? A.Disappointed B.Frightened. C.Amused D.Disgusted. 2Whydoscientistswanttounderstandhowthefruitflyknowswater? A.Todecreasethenumberofthefruitfly. B.Toknowmoreaboutothercreatures. C.Tomanagetousewatercorrectly. D.Todescribethetasteofwater. 3WhatdoweknowaboutthePPk28protein? A.Itcanmakehumanstastesalt. B.Itenablesthefruitflytotastewater. C.Thefruitflycan'tlivewithoutit. D.Thefruitflyusesittoavoidillnesses. 4Whatwillthescientistscontinuetoworkat? A.MakingthePPk28protein. B.Tellingmoreinformationaboutcells. C.Creatingmapsofhumanbrains. D.Studyingthefruitfly'sneuronsystems.
Whetheryoulikeitornotasstudentsyouhavetolivewithroommatesaftergoingtoschooloruniversity.Havingaroommatecanbeoneofthebestexperiencesoreasilyoneoftheworst.1 Herearefivetipsforyoutofollowtoavoidthecommonmistakesthatmakegoodroommaterelationshipsworse. Talkthingsout.2Ifsomethinghappenssitdownwithyourroommatesandhaveaface﹣to﹣faceconversation.Complainingaboutyourroommatesbehindtheirbackscreatesnothingbutbadsituationsandgeneralunhappiness. 3Someroommatesbecomethebestoffriendsandsomedon't.Don'tputpressureonyourselforyourroommatetoreachthislevelespeciallywhenyoufirstmeet.Rememberyouaretryingtomakeanewfriendnotfrightenyourroommateaway.Andifyouroommatedoesn'tendupbeingyourbestfriendthereisnoneedtoworryaboutit. Cleanupafteryourself.Oratleastkeepyourthingsonyourside.4Butbeingconsiderate考虑周到的withwhereyouputyourownstuff东西willhelpyouavoidthearguments. Askbeforeyoutake.Thisappliesto适用于foodclothesandanythingelsethatyoudon'town.5Evenifyoubothagreetoshareeverythingyoushouldstillask. A.Don'texpecttobebestfriends. B.Communicationisofvital至关重要的importance. C.Youdon'tneedtokeeptheroomcleanandorganizedallthetime. D.Roomscanbereallyeasyforamesstopileup. E.Ifyouwanttohaveagoodrelationshipwithyourroommateitallstartswithyou. F.Trytomakeyourroommatesyourbestfriends. G.Showyourroommatethatyouhaverespectforhisorherthings.
假设你是南阳中学的学生李华将参加主题为Let'spickupabookandread的英语演讲比赛.请你写一份演讲稿主要内容包括 1.目前很多学生课余时间沉溺于网络远离书本导致记忆力减退对学习失去兴趣等问题. 2.阅读的益处如开阔视野增强理解力提高成绩等. 注意1.词数100左右.演讲稿开头和结尾已给出但不计入总词数. 2.可适当增加细节以使行文连贯. Goodmorningeveryone I'mLiHuafromNanyangMiddleSchool.ThetopicofmyspeechisLet'spickupabookandread. Thankyou!
IntheUSAColumbusDayisinmofthearrivalofChristopherColumbusintheNewWorld.
It'sasadandfamiliarvoicethatweoftenhearinbigcitiesCanyousparesomechange? Usuallywhenfacedwiththatparticular1IhavefeelingsofguiltifIpassby2givingacoinortwo. Ihadthatfeeling3inVenicewhileonatourofItaly'sfamoussitesin2006.Ihadtakenrefugefromthe4inaquietcafé.Outsidetherewasanoldwomankneelingonthehardancientpavingstones5. Steady6oftouristswerewalkingpasther.Ayoungbackpackerstoodawayfromthecrowd7drinkinginthescenerybutInoticedtheyoungtravelerwasalso8theoldwoman. Atouristgroupwalkedalongthestreet9thewomanandwalkedon.10groupoftouristsarrivedandwalkedpasttheoldlady.Thebackpackerwatched11everybodyelsewentontheirwayfocusedonthe12aroundthem.ThenIwaspreparingtoleavewhenIcaughtsightofthebackpackersteppingforwardand13somemoneyinthewoman'scup.Hedidthissomewhat14justbeforethearrivalofanothertouristgroup.AsI15theleaderofthegroupstoppedandputsomemoneyinthecup.Havingbeenshownthewayothertouristsfollowedsuitand16somemorecoinstothecup. Hisworkdonetheyoungmanwalkedovertotheoldbeggar﹣womanpattedherontheshoulderandsaidIhopethat17alittle. Idon'tknowifthewomanunderstoodhisEnglishor18whathadjusthappenedbutIdid. Iplacedsomemoneyinthewoman'scupandcontinuedmytravels19afterwitnessingsuchan20actofkindness. 1A.sound B.question C.excuse D.command 2A.beyond B.after C.without D.before 3A.manytimes B.sometimes C.onlyonce D.onceagain 4A.crowds B.families C.streets D.signs 5A.singing B.crying C.begging D.trembling 6A.streams B.packs C.masses D.groups 7A.simply B.seemingly C.similarly D.specially 8A.showing B.following C.checking D.observing 9A.glancedat B.laughedat C.rushedat D.staredat 10A.One B.More C.Another D.Other 11A.if B.since C.because D.as 12A.stones B.sights C.signs D.tourists 13A.lending B.borrowing C.placing D.taking 14A.accidentally B.successfully C.deliberately D.cheerfully 15A.watched B.shown C.understood D.walked 16A.changed B.charged C.found D.added 17A.measures B.helps C.explains D.matters 18A.recognized B.caught C.realized D.figured 19A.pleasant B.annoyed C.disappointed D.delighted 20A.beautiful B.admirable C.pure D.accurate
Abdietandregularphysicalactivitywillhelpyoukeepfit.
ThemusicwaswrittenbyAbingafolkmwhowasborninthecityWuxiin1893.
BothEnglishandFrenchareolanguagesinCanada.
Tobehalotofpeopleattachgreatimportancetobecomingrichandfamous.
难以相信的是itactuallyworks.
HowtomakeQuickDecisionsForYourLife Wemakedecisionseveryday.1Whenitcomestomakingdecisionschoosingtherightonecanattimesbestressfulespeciallyifthedecisionmustbemadequickly.Indecisionoftenweighsusdownbuttherearesomeusefultipsformakingquickdecisionsmoreeasily. 2Sometimesthekeytomakingaquickdecisioncomesdowntoplanningaheadoftimeforjustsuchanoccasion.Weallknowwe'regoingtocometoanimportantdecision﹣makingpointsoonerorlatersohavingaplanalreadyinhandcanputourmindateasewhenthattimecomes. Overcomefear.3Whileitmayseemdifficulttoovercomethefearofmakingthewrongchoicemanyexpertsagreethatweshouldn'tbeafraidtomakethewrongdecisionevenifitseemsimportant.Thevastmajorityofwrongdecisionscanbecorrectedwhiledelayingdecisionscanoftenleadtomoreproblems. Writedownalltheadvantagesanddisadvantagesofyourdecision.Evenifyoudon'thavealltheinformationwritingdownalltheprosandcons优缺点isagoodstartingpointforfiguringoutwhattodo.Incaseswheretheresimplyisn'tenoughtimetowritethingsdownmakeamentallistinyourmind.Thinkingoftheprosandconscanhelpyouorganizeyourthoughts.4 Determinecriteria.Rememberthateverydecisionyoumakeshouldcomewithacertainlistofcriteria.5Butonceyouknowtherequirementsyou'relookingformakingadecisionwillbecomeeasier.Lookforthechoicethatsatisfiesthelistyou'vemadeandoncethatchoiceisfoundyoushouldmoveaheadwithit. A.Haveaplan. B.Thelistmaybeshortorquitelong. C.Communicateyourdecisionwithothers. D.Andthiscanalwaysleadtoaclearanswer. E.Socutoutanyoptionsthatyouknowyouwillnotchoose. F.Oftenonethingthatkeepsusfrommakingdecisionsisfear. G.Somecanbeveryimportantwhileothersarenotseriousinthelongrun.
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