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对于在水平公路上匀速行驶的太阳能汽车，下列说法正确的是（ ）
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我国目前研发了一种太阳能汽车深受人们青睐该汽车的质量为1200kg车轮与水平地面的接触总面积为300
如图甲是在水平公路上匀速行驶的太阳能汽车．太阳能是一次能源又是可再生不可再生能源太阳内部时刻都在发
太能能汽车是一种靠太阳能来驱动得汽车相比传统热能驱动的汽车太阳能汽车是真正的零排放正因为其环保得特
太阳能汽车上表面设计和飞机机翼表面形状相似是为了减小重力
太阳能汽车匀速直线运动时，其所受重力与支持力二力平衡
太阳能汽车静止和运动时，受地面支持力大小不变
太阳能汽车匀速直线运动时，重力大于支持力
如图8-3-8甲所示在水平公路上匀速行驶的太阳能汽车受到两对平衡力的作用请在图乙上画出汽车受力的示意
太阳能清洁无污染是人类能源的宝库某太阳能汽车总质量为400kg顶部安装了太阳能电池板如图所示太阳光照
如图甲所示在水平公路上匀速行驶的太阳能汽车受到两对平衡力的作用请在图乙上画出汽车受力的示意图甲乙
随着人们生活水平的提高小汽车已经进入普通百姓家庭下列关于小汽车的说法正确的是
汽车在水平公路上静止时，汽车对地面的压力和地面对汽车的支持力是一对平衡力
汽车在水平公路上高速行驶时，汽车对地面的压力小于汽车的重力
汽车在水平公路上匀速直线行驶时，所受牵引力与阻力是一对相互作用力
使用安全带和安全气囊是为了减小惯性
太阳能是21世纪重点发展的能源之一太阳能汽车是利用太阳能电池将接收到的太阳能转化为电能再利用电动机来
为了节约能源减轻污染人类发明了太阳能汽车．图所示是一辆在水平公路上匀速直线行驶的太阳能汽车下列说法
太阳能汽车将太阳能最终转化为动能
太阳能汽车受到的重力与汽车对地面的压力是一对平衡力
太阳能汽车受到的牵引力与阻力是一对相互作用力
太阳能汽车的运动状态没有改变，此时它不具有惯性
如图所示太阳能汽车的表面布满太阳能电池板该电池能将太阳能转化为能供电动机转动汽车在水平公路上匀速行驶
如图所示太阳能汽车的表面布满太阳能电池板该电池能将太阳能转化为能供电动机转动．汽车在水平公路上匀速
如图所示太阳能汽车的表面布满太阳能电池板该电池能将太阳能转化为能供电动机转动．汽车在水平公路上匀速行
太阳能是21世纪重点发展的能源之一太阳能汽车是利用太阳能电池将接收到的太阳能转化为电能再利用电动机来
太阳能汽车是利用太阳能电池将接收到的太阳能转化为电能再利用电动机来驱动汽车的一种新型汽车有一辆太阳能
如图是太阳能汽车在平直公路上匀速行驶的情形若不计空气对汽车的影响则下列说法正确的是
汽车的重力和地面对汽车的支持力是相互作用力
汽车受到两对平衡力的作用
汽车急刹车时不能立即停止，是由于速度大惯性大
太阳能汽车行驶时是将太阳能直接转化成机械能
太阳能是21世纪重点发展的能源之一太阳能汽车是利用太阳能电池将接收到的太阳能转化为电能再利用电动机来
如图所示太阳能汽车的表面布满太阳能电池板该电池能将太阳能转化为能供电动机转动．汽车在水平公路上匀速
随着人们生活水平的提高小汽车已经进入普通百姓家庭下列关于小汽车的说法正确的是
汽车在水平公路上静止时，汽车对地面的压力和地面对汽车的支持力是一对平衡力
汽车在水平公路上高速行驶时，汽车对地面的压力小于汽车的重力
汽车在水平公路上匀速直线行驶时，所受牵引力与阻力是一对相互作用力
使用安全带和安全气囊是为了减小惯性
如图甲所示在水平公路上匀速行驶的太阳能汽车受到两对平衡力的作用请在图乙上画出汽车受力的示意图．
如图甲是在水平公路上匀速行驶的太阳能汽车．太阳能是一次能源又是可再生不可再生能源太阳内部时刻都在发
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Wheneversomethinglooksinterestingorbeautifulthere'sanaturalimpulse冲动towanttoownandpreserveit﹣whichmeansinthisdayandagethatwe'relikelytoreachforourphonestotakeapicture. Thoughthiswouldseemtobeanidealsolutiontherearetwobigproblemsassociatedwithtakingpictures.Firstlywe'relikelytobesobusytakingthepicturesthatweforgettolookattheworldwhosebeautyandinterestdroveustotakeaphotographinthefirstplace.Andsecondlybecausewefeelthepicturesaresafelystoredonourphoneswenevergetaroundtolookingatthemsosurearewethatwe'llgetaroundtoitoneday. Theseproblemswerenoticedrightatthebeginningofthehistoryofphotographywhentheaveragecamerawasthesizeofagrandfatherclock.ThefirstpersontonoticethemwastheEnglishartcriticJohnRuskin.Hewasatravelerwhorealizedthatmosttouristsmakeaboringjobofnoticingorrememberingthebeautifulthingstheysee.Hearguedthathumanshaveanaturaltendencytorespondtobeautyandwishtohaveitbutthattherearebetterandworseexpressionsofthisdesire.Atworstwegetintobuyingsouvenirsortakingphotographs.ButinRuskin'seyesthere'sonethingweshoulddoandthatisattempttodrawtheinterestingthingsweseenomatterwhetherwehaveanytalentfordoingso. Ruskinwasveryupsetbyhowseldompeoplenoticedetails.HestronglydislikedthetravelerswhopridedthemselvesoncoveringEuropeinaweekbytrain.Ifhebetrulyamannoharmtogoslowforhisgloryisnotatallingoingbutinbeing. 1Peopleareeagertotakepicturesatseeingsomethingbeautifulbecause. A.it'shuman'sborndesireofowning B.it'sconvenienttodosowithamobilephone C.theyareusedtohurryingforeverything D.theycannotwaittoshareitwithfriends 2Whentakingpicturespeoplemay. A.findagoodwaytostoregoodmemoriesintheirminds B.feelithardtolearntheskillsoftakinggoodphotos C.ignoreappreciatingsomethingattractiveonthespot D.havechancestomeetthechallengeofnewtechnology 3Accordingtothelastparagraphtravellingpeopleareusuallyproudof. A.thelongdistancethattheyhavecovered B.thehappyhoursthattheyhavegonethrough C.theadvancedtransporttoolthattheyhavetaken D.thegreatconveniencethattheyhavebeenoffered 4WecanconcludethatRustinattachedimportanceto. A.travellingaroundtheworld B.takingbeautifulphotoswithacamera C.takingphotosinsteadofpaintingpictures D.admiringtheworld'sbeautyattentively
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TwoofthesaddestwordsintheEnglishlanguageareifonly.Ilivemylifewiththegoalofneverhavingtosaythosewordsbecausetheyconveyregretlostopportunitiesmistakesanddisappointment. MyfatherisfamousinourfamilyforsayingTaketheextraminutetodoitright.Ialwaystrytolivebytheextraminuterule.WhenmychildrenwereyoungandlikelytocauseaccidentsIalwaysthoughtaboutwhatIcoulddotoavoidanifonlymomentwhetheritwassomethingminorlikemovingacupfullofhotcoffeeawayfromtheedgeofacounterorsomethingthatrequiredalittlemoreworksuchastapingpadding衬垫ontothesharpcornersofaglasscoffeetable. Idon'tonlyavoidthoseifonlymomentswhenitcomestosafety.It'sequallyimportanttoavoidifonlyinourpersonalrelationships.WeallknowpeoplewholostalovedoneandregrettedthattheyhadlostanopportunitytosayIloveyouorIforgiveyou.WhenmyfatherannouncedhewasgoingtotheeyedoctoracrossfrommyofficeonGoodFridayItoldhimthatitwasaholidayformycompanyandIwouldn'tbethere.ButthenIthoughtaboutthefactthathe's84yearsoldandIrealizedthatIshouldn'tgiveupanopportunitytoseehim.IcalledhimandtoldhimIhaddecidedtogotoworkonmydayoffafterall. IknowtherewillstillbeoccasionswhenIhavetosayifonlyaboutsomethingbutmylifeisdefinitelybetterbecauseofmypolicyofdoingeverythingpossibletoavoidthateventuality不测的事.AndeventhoughittakesanextraminutetodosomethingrightoritoccasionallytakesanhourortwoinmybusyscheduletomakeapersonalconnectionIknowthatI'mdoingtherightthing.I'mbuyingmyselfpeaceofmindandthat'sthebestkindofinsuranceformyemotionalwell﹣being. 1Whichofthefollowingisanexampleoftheextraminuterule? A.Startthecarthemomenteveryoneisseated. B.Leavetheroomforaminutewiththeironworking. C.Waitforanextraminutesothatthesteaktastesbetter. D.Moveanobjectoutofthewaybeforeitletssomeonefalldown. 2WhydidtheauthordecidetogotoherofficeonGoodFriday? A.Tokeepherappointmentwiththeeyedoctor. B.Tomeetherfatherwhowasalreadyanoldman. C.Tojoinintheholidaycelebrationofthecompany. D.Tofinishherworkbeforethedeadline. 3Whatcanweinferfromthepassage? A.Itisthemostimportantthingtoavoidifonlyinourdailylife. B.Theauthormusthaveagoodrelationshipwithherchildren. C.Weshouldbuyinsurancetomakeourlifebetter. D.Avoidingifonlycanmaketheauthorcomfortable. 4Whatisthebesttitleforthepassage? A.TheEmotionalWell﹣being. B.TheTwoSaddestWords. C.TheMostUsefulRule. D.ThePeaceofMind.
Whileastronautsinspacegettodomanyexcitingthingstheymissoutonordinarythingsthatwealltakeforgranted﹣beingabletowalkonfirmgroundhangingoutwithfamilyanddiggingintoasliceofhotsteamingpizza.Thoughnotmuchcanbedoneaboutthefirsttwothingstheremaysoonbeasolutiontothethirdonethankstothiscool3﹣Dpizzaprinter! AboutayearagoNASAoffered﹩125000toAnjanContractora3﹣Dtechnologyexperttobuildadevicethatwouldallowastronautstomakepizzaondemand.Themechanicalengineerpromisedthathisinventionwouldproducepiesinlargequantitiesthatlookedtastedandevensmelledlikepizzamadeincommonovens. Latelastyeartheengineerpresentedavideoofhisfirstprototype原型thatbeginsbycreatingasinglesliceofdough面团thatiscookedandprintedatthesametime.Thencomesthetomatosauce﹣amixoftomatopowderoilandwaterandfinallyaproteinslicethatresemblescheese.Whilethevideodoesn'tshowthebakingprocesstheinventorsaysthatoncethepizzaisprinteditcanbereadytobeconsumed消耗in7seconds. WhilethepieinthevideolooksdeliciousenoughtoattractanypizzaloverAnjanContractorisfarfromreadyforastronauts.That'sbecausehestillhastofindasolutiontomakethefoodcontainerintheprinterlastfor30years.Thoughthatmaysoundunrealisticactuallyitisnot.AnjanContractorbelievesthattheonlywaythatispossibleisthatthewaterisremovedfromalltheingredientsandthentheyarereducedtothepowderform.Thisasyoucanimaginewillnotbesoeasy.Butwhiletheprintermaynotbereadyforspaceitcertainlylooksreadyenoughforpeopleonearth.HopefullyNASAandContractorwillconsidersellingittothosenotfortunateenoughtogotoMars! 1Whydoestheauthormentionthethingsthatastronautsinspacecannotdo? A.Toaskusnottotakecommonthingsforgranted. B.Toshowtheyliveadifficultlifethere. C.Toshowtheirlifeisboringinspace. D.Tointroducethetopicofthetext. 2NASAoffered﹩125000toAnjanContractormainlyto. A.createsomenewtypeof3﹣Dprinter B.attractmorecompaniestoworkforNASA C.helpastronautsinspaceenjoyfreshpizzaoneday D.producepizzainlargequantitiestoearngreatprofits 3ThebiggestchallengethatAnjanContractorisfacedwithnowisprobablythat. A.hehasnomoneylefttogoonwithhisresearch B.thepizzadoesn'tseemappetizingtopizzalovers C.hehasnowaytomakepizzathatcanlastforthirtyyears D.hecannotmakethefoodcontainerlastfordecades 4What'sthebesttitleofthepassage? A.NASAistryingitsbesttohelpastronautseatbetter B.Astronautsmaysoonbeabletoenjoysteaminghotpizza C.NASAisworkingonmakingpizzaforcommonpeople D.A3﹣Dpizzaprinterhasbeenusedtomakepizza
Themoonhadgonebehindacloudandthereweren'tmanystarsinthesky.AsItookaglance一瞥atmyneighbor'shouseIsawaflame火焰inhis1.IthoughthewashavingamidnightfastfoodsoIwentbacktomy2. Soontherewasa3smellintheairandIguessedsomethingwaswrong.4Ijumpedoutofbedandwentdownstairsto5.Isawfirecomingoutofmyneighbour'skitchen.RightawayI6Fire!Fire!Buttherewasnoonenearbyto7myshoutsforhelp. I8intomyhousecalledtheFireDepartmentandwentbacktomyneighbour'shouse.Irangthedoorbellhitonthedoorand9myneighbour'snamebuttherewasno10.Imanagedto11thehouseandrescuedacatandarabbit. Itriedtothrowwaterthroughthekitchenwindow12itwasnousethefirewastoostrong.13afireenginearrivedandsoonthefiremenputoutthefire.Theyarrivedjust14asthefirewasgoingto15totheotherroomsinthehouse. Whenmyneighbourcamebackhewas16becausehiskitchenwasburntdownbuthethankedmeforcallingtheFireDepartmentandforsavinghis17.HewantedtogivemesomemoneyinreturnbutIdidnot18it. Weekslatermyneighbourrepairedandrestoredhiskitchen.He19metoseehisnewkitchenandtherehegavemeamedal奖章thathehad20orderedfromafactory.Itmademefeelveryhappy. 1A.sittingroom B.bathroom C.kitchen D.bedroom 2A.chair B.table C.bed D.sofa 3A.big B.hot C.special D.burning 4A.Afterawhile B.Allthetime C.Onceinawhile D.Atonce 5A.examine B.search C.listen D.smell 6A.said B.shouted C.received D.smiled 7A.hear B.listento C.ask D.turnto 8A.walked B.rushed C.jumped D.stepped 9A.calledin B.calledup C.calledout D.calledfor 10A.answer B.light C.sound D.fire 11A.takeout B.takeup C.breakdown D.breakinto 12A.and B.but C.because D.so 13A.Luckily B.Sadly C.Unfortunately D.Suddenly 14A.intime B.ontime C.atatime D.attimes 15A.run B.spread C.flow D.return 16A.glad B.sad C.sick D.angry 17A.children B.parents C.life D.pets 18A.expect B.want C.accept D.get 19A.ordered B.begged C.advised D.invited 20A.mainly B.particularly C.specially D.naturally
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The10thannualInternationalGoSkateboardingDaywillbeheldonJune212012.SkateboardingDayisallaboutfun!Hereisyourguidetosomeoftheeventsaroundtheworld. LosAngelesCalifornia Over10000skateboardersfromaroundtheworldwillgatherinthestreetsofL.A.TheyhavepartneredwithBoardsforBrosanonprofitorganizationthatcollectsandrestores修复skateboardsforchildrenwhocannotaffordtheirownandhaveaskedskateboardersacrosstheUStodonatetheirusedskateboardproducts.Thecelebrationwilllastmostofthedaytime. ManilaPhilippines TheSkateboardingDaytobeheldinthePhilippineswillbeintheManilaforthesecondtime.Manilaishopingtopromotehealthandskateboardingsports.Theeventbeginsat200pmandendsat600pm.TheskateboardersstartfromLiwasangBonifaciowheretheycanskateinthestreetsofP.BurgosRoxasBoulevardanduptoMalatefountaininRajahSolimanParkwheretheeventendswithaProductTossandBestTrickcontest. SylvanLakeAlbertaCanada IfyouhappentobeinAlbertaCanadaandtheweatherisn'tgreatforoutdoorskatingInclineSkate&BMXParkistheplacetogoskateboarding.Inclineisagreatplacetoskateandadaypassthereisonly﹩8foranadulthalfforthosebelow16.OnGoSkateboardingDaytheywillholdacompetitionwiththefirstprizewinnertakinghome﹩600. NewYorkCityNewYork SteveRodriguezownerandfounderofSBoroSkateboardsholdsthebiggestchapteroftheSkateboardingDayintheworld.TensofthousandsofpeoplewillparticipateandJune21stisnowanofficialNewYorkCityholiday.Theeventstartsat10amandendsat6pm.Therewillbeafreeclinicat10amtonsofprizesfoodanddrinks.Fordetailsofthefulldaypleasecheckouthttp://www.Sboro.com. 1ItcanbelearnedthattheBoardsforBrosaimsto. A.provideskateboardsforpoorchildren B.collectusedskateboardproductstothefestival C.searchforcompetitorsforthefestivaleveryyear D.restoreskateboardsonlyforthecompetitors 2Howmuchwilltheypayifacouplewiththeir14﹣year﹣oldchildskateinIncline? A.Eightdollars. B.Twelvedollars. C.Sixteendollars. D.Twentydollars. 3Wherewilltheeventorcelebrationlasttheshortest? A.InManilaPhilippines. B.InLosAngelesCalifornia. C.InSylvanLakeAlbertaCanada. D.InNewYorkCityNewYork.
IlostmysightwhenIwasfouryearsoldbyfallingoffacarandhurtingmyhead.NowIamthirtytwo.Icanvaguelyrememberthebrightnessof1andwhatcolourredis.Itwouldbe2toseeagainbutan3candostrangethingstopeople.Idon'tmeanIwould4togowithoutmyeyes.IsimplymeanthatthelossofthemmademeappreciatemorewhatIhad5. Myparentsandmyteacherssawsomethinginme﹣a6tolive﹣whichIdidn'tseeandtheymademewanttostiritupwith7. The8lessonIhadtolearnwastobelieveinmyself.Iamnottalkingaboutsimplythekindof9thathelpsmedownanunfamiliarstaircasealone.I10somethingbiggerthanthataconfidencethatIamdespitebeing11arealpositivepersonthatthereisaspecialplacewhereIcanmakemyselffit. Ittookmeyearstodiscoverandstrengthenthisconfidence.Ithadtostartwiththeeasyandsimplethings.12amangavemeanindoorbaseball.IthoughthewaslaughingatmeandIwas13.Ican'tusethisIsaid.Takewithyouheurgedmeandrollitaround.Thewords14inmymind.Rollitaround！ByrollingtheballIcould15whereitwent.ThisgavemeanideahowtoachieveagoalIhadthought16beforeplayingbaseball.AtPhiladelphia'sOverbrookSchoolfortheblindI17asuccessfulvariationofbaseball.Wecalleditgroundball. Ihavesetaheadofmeaseriesofgoalsandthentriedtoreachthemoneatatime.Ihadtobeclearaboutmy18.ItwasnogoodtryingforsomethingthatIknewatthestartwas19outofreachbecausethatonlybroughtbitternessoffailure.Iwouldfailanyway20ontheaverageImadeprogress. 1A.sky B.cloud C.sunshine D.mist 2A.helpful B.wonderful C.hopeful D.successful 3A.disaster B.environment C.incident D.wonder 4A.manage B.try C.want D.prefer 5A.lost B.left C.used D.cared 6A.purpose B.potential C.pressure D.preparation 7A.energy B.happiness C.luck D.blindness 8A.hardest B.dullest C.simplest D.easiest 9A.self﹣respect B.self﹣control C.self﹣confidence D.self﹣defence 10A.think B.consider C.guess D.mean 11A.imperfect B.perfect C.unfair D.fair 12A.Later B.Soon C.Once D.Then 13A.worried B.encouraged C.shocked D.hurt 14A.stuck B.impressed C.occupied D.held 15A.see B.hear C.notice D.observe 16A.important B.unimportant C.possible D.impossible 17A.invented B.discovered C.instructed D.directed 18A.experience B.advantages C.knowledge D.limitations 19A.hardly B.wildly C.highly D.deeply 20A.so B.for C.but D.and
“低碳生活”是指生活中所耗用的能量材料要尽量减少从而减低二氧化碳的排放量．下列做法不符合“低碳生活”理念的是
MaryAnningwasanEnglishfossil化石collectordealerandpaleontologist古生物学家.Herfossil﹣huntinghelpedchangethewaypeoplethoughtabouttheworld. MarywasbornintoapoorfamilyinEnglandonMay211799.ShelivedintheseasidetownofLymeRegisinDorset.Thefamilyhadninechildren.OnlyMaryandherbrotherJosephgrewup.Mary'sfathertookhischildrenalongthebeach.Theypickedupshellsandstonestoselltovisitors.Marydidnotgotoschoolmuch.Herfamilywastoopoor.Andschoolsdidnotteachchildrenaboutfossils.Marycouldreadandwrite.Shetaughtherself.Shelearnedaboutrocksandhowbodiesaremade. In1811whenMaryandJosephwerefossilhuntingJosephsawabonestickingoutoftherock.Maryhadahammertochipawayattherock.Verycarefullysheuncoveredit.Shefoundthefirstcompletefossiloftheichthyosaur鱼龙. SincethenMarybecamecrazyaboutfossilhunting.Shelikedtohuntonthebeachafterastorm.Thewindrainandwavesmadetherockscrumble.Itwaseasytospotfossils.MostdaysMarywentfossilhuntingwithherdogTray. RichfriendshelpedMarybysellingfossilsforher.Theysenthermoney.Scientistswrotelettersandcametoseeher.OnegoodfriendwasWilliamBucklandaprofessoratOxfordUniversity.Maryalsoopenedashoptosellfossilsstonesandshells.Shechattedwithvisitors. MaryAnningdiedin1847.Howevolution进化workswasexplainedbyCharlesDarwinnotlongafterMarydied.Herfossilshadhelpedscientistsunderstandhowthingsbegan. 1WhydidMary'sfathertakehischildrenalongthebeach? A.Toenjoylife. B.Tomakealiving. C.Tolookforfossils. D.Toteachthemaboutfossils. 2WhatcanwelearnaboutMary? A.Herfatherwasapaleontologist. B.Herfathereducatedherathome. C.Shehadninebrothersandsistersinall. D.Shemightbepopularatthattime. 3Whowasthefirstonetocatchsightoftherockcontainingthefirstcompleteichthyosaurfossil? A.CharlesDarwin. B.Mary'sdog. C.Joseph. D.Mary. 4Whatdoestheunderlinedwordcrumbleinthefourthparagraphmeans? A.break B.shake C.float D.dive
MarkTwainwasa幽默的writerandhiworksalwaysmakereaderslaugh.
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. It'stimeforustograduate.BeforepartingourclassisgoingtoholdthelastclassmeetingwhichthemewillbethePastGoldenDays.Weplantohaveseveralactivitiestobringaunforgettableendingtoourbeautifuldays.Firstlywewillwatchthephotostakeduringthethreeyearsespecialaboutourschoolevents.Itwillsurelymakeeveryonetorecallthosepreciousmoments.Thenwe'llextendoursinceregratitudetoourteachers.Itisthemwhogivewithoutaskinganythingforreturn.Thencameoneofthemostimportantmomentinourlife﹣﹣abigparty.InawordIhopethelastclassmeetingwillmeaningful.
现有50g溶质质量分数为10%的氢氧化钠溶液加入50g溶质质量分数为10%的硫酸铜溶液充分反应过滤除去沉淀所得溶液中含有离子是
Lastweekinanunusualwayastrangertreatedmewithgenerosity.AtanAsiangrocerystoreonabusyeveningIwasshoppingfortheitemsIneeded1myvoluntaryworkofcookingbreakfastonSaturdayatashelterforthehomelessinSanJose.Iwenttothestore2buytofuandvegetables.AsI3waitinlinetofinishthepurchasetheladynexttomeapproachedmetofindout4IwasgoingtoconsumethebigboxoftofuIwasbuying.EnthusiasticallyIrepliedthatIwasbuyingfoodtocookbreakfastforhomelesspeople. WhileIwasgettingreadytopaythebilltomy5amazesheofferedtopayforeverything.Despitemultiplerequestsfor6namesherespondedthatshefeltgoodbecauseIwasdoingthekindofcommunityworkwhichherparentsoncereceivedhelpfrom7theycametothiscountryasrefugees.Henceshewantedtotake8opportunitytoshowhergratitude. Itwasthe9goodrewardIhadeverreceivedformyvoluntarywork10beganthreeyearsago.Inastrangewayweareallconnectedandwefeelgratefulforeachother.
学习化学最重要的是善于用化学知识去分析解决生产生活中的问题．从化学的角度看下列说法中正确的是
Fouryearsagoweaskedourselveswhatifwecouldcreateashoppingexperiencewithnowaitinginlinesandnocheckout?Orcouldwecreateaphysicalstorewherecustomerscouldsimplytakewhattheywantandgo?OuranswertothosequestionsisAmazonGowhereyoucouldexperiencetheideaofjustwalkoutshopping. AmazonGoisanewkindofstorewithnocheckoutrequired.Wecreatedtheworld′smostadvancedshoppingtechnologysoyouneverhavetowaitinline.WithourjustwalkoutshoppingexperiencesimplyusetheAmazonGoapptoenterthestoretaketheproductsyouwantandgo!Nolinesnocheckout. Ourcheckout﹣freeshoppingexperienceismadepossiblebythesametypesoftechnologiesusedinself﹣drivingcarscomputervisionsensorfusionanddeeplearning.Ourjustwalkouttechnologyautomaticallydetectswhenproductsaretakenfromorreturnedtotheshelvesandkeepstrackoftheminyourvirtualcart.Whenyou9redoneshoppingyoucanjustleavethestore.Shortlyafterwe′llchargeyourAmazonaccountandsendyouareceipt. Weofferdeliciousready﹣to﹣eatbreakfastlunchdinnerandsnackoptionsmadefresheverydaybyouron﹣sitechefsandfavoritelocalkitchensandbakeries.Ourselectionoffoodstuffrangesfrombreadandmilktocheesesandlocallymadechocolates.Yoifllfindwell﹣knownbrandsweloveplusspecialfindswe′reexcitedtointroducetocustomers.Foraquickhome﹣cookeddinnerpickuponeofourchef﹣designedAmazonMealKitsandyoucanmakeamealfortwoinabout30minutes. Our1800﹣square﹣footshoppingspaceisconvenientlycompact紧凑的sobusycustomerscangetinandoutfast.Itislocatedat21317thAveSeattleWAonthecornerof7thAvenueandBlanchardStreet.AllyouneedisanAmazonaccountasupportedsmartphoneandthefreeAmazonGoapp. AmazonGoiscurrentlyonlyopentoAmazonemployeesinourtestingprogramandwillbeopentothepublicsoon. 1FromthepassagewecanlearnthatAmazonGo. A.isacheckout﹣freestore B.sellsallkindsofgoods C.isopentothepublic D.usesunknowntechnologies 2WhatismainlydiscussedinParagraph3? A.WhenAmazonGocharges. B.HowAmazonGoworks. C.WhereAmazonGolies. D.WhatAmazonGosells. 3CustomerspayfortheproductsfromAmazonGoby. A.payingcashatthecounter B.walkingoutofthestore C.usingtheirAmazonaccounts D.scanningsmartphoneswhenleaving 4Themainpurposeofthepassageisto. A.encouragepeopletoshoponline B.advisepeopletoworkforAmazon C.informpeopleofanewconceptstore D.tellpeopleoftheshoppingexperience
Itwas难以置信的thatsuchanhonestfellowshouldhavebetrayedhisfriends.
1若核电荷数为16的元素的符号为R则粒子可用离子符号来表示R元素的原子最外层电子数为． 2铁元素是组成人体血红蛋白的重要元素市场上有含少量铁粉的营养麦片在人体胃液中与盐酸反应转化成可吸收的亚铁盐从而达到补铁的目的写出铁粉在胃液中发生的化学方程式铁元素在生成物中的化合价是．
如图矩形ABCD中AB＝2AD以A为圆心AB长为半径作弧BECD于E若AB＝4则阴影部分的面积为结果保留π和根号．
AB两地之间有一C地某日早上9点一辆电力巡查车作例行巡查查线路是从A地到C地再原路返回A地全程匀速行驶调头时间忽略不计．家住C地的陈先生同样是在当天的早上9点出发驱车前往B地取一份文件然后返回经C地前往公司所在地A地．陈先生余程也是匀速行驶取文件花费了4分钟设两车之间的距离为ym出发后的行驶时间为xminy与x的关系如图所示．那么当电力巡查车到达C地时陈先生距A地还有m．
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. DisappointingattheresultoftheexaminationIsatonthesofainsilentafterschool.MyfatherhefoundIwassounhappycometoaskmewhy.Afterlearningthereasonmyfathergavemeasmile.HesaidDon'tallowtheterriblythingsinyourlifetodiscountthepositiveones.Don'tletabaddayormonthoryeartomakeyoufeellikeyouhaveabadlifeinsteadfocusingoneverythingthat'sgoingwrongstartholdingontoallofthethingsthatisgoingright.You'llfeelbettersoon.HeardwhatmyfathersaidIfeltittheshametoactlikethatanddecidedtocheermyselfup.
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