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小椿同学设计了一种照明电路，其设计要求是：用两个开关控制一盏灯，两个开关同时闭合灯才能发光，只闭合其中任意一个开关，灯都不能发光．下面四幅电路图中，既符合上述要求，又符合安全用电要求的是（ ）
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小椿同学设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意
小椿同学设计了一种照明电路其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意
绘图题设计一个照明电路要求用一个开关控制两个灯
小宁设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一个
给你一个电池组一个开关一个滑动变阻器一个电流表和两个灯泡请设计一个电路.要求开关断开时两灯都不发光闭
小宁用四盏灯两个开关设计了教室的照明电路要求每个开关都能独立控制两盏灯如图所示的电路图中符合要求的是
小宁设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一个
小宁设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一
小宁设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一
小明想设计一种照明电路图其设计要求是用两个开关控制一盏灯泡两个开关同时闭合灯泡才能发光只闭合其中任意
小椿同学设计了一种照明电路其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意
在学习了电学知识后同学们尝试设计电路和编制习题老师提供了以下器材电源两个12V18W的电阻和若干开关
小宁设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一
小宁用四盏灯两个开关设计了教室的照明电路要求每个开关都能独立控制两盏灯如图所示的电路图中符合要求的是
小宁设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一个
小椿同学设计了一种照明电路其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意
小明同学设计了一种照明电路其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一
小宁设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一
小宁设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一
小宁设计了一种照明电路图其设计要求是用两个开关控制一盏灯两个开关同时闭合灯才能发光只闭合其中任意一个
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Iwenttothe50threunionofmyhighschoolonaSaturdayevening.1usdanceagainonthefloorwasamazing.Wemightaswellhavebeen18.Imustsaytheylookedgoodandwerestillslim!Peopleseemedtocome2comfortabletobethemselves3andwiser.Wewere4togatheragainforafewmoments.Itwasagiftto5someformerclassmatesrightaway﹣andtoberecognized.6wehadnametagsandouroriginalphotosonourclothingtohelp7us. Themost8andmovingexperienceofthenightwasprovidedbyaschoolmateandneighborwithwhomIwasonceclose.9wehadafallingoutinhighschool.Ineversawherafter10butthistimeIsawhernameonaplacesetting.AtfirstIwasconcernedabout11her.Butmybetterself12andIstartedtoseekherout.IkeptlookinguntilIgota13onmyshoulder.Thereshewassmiling.Wehuggedasifnothinghadeverhappenedand14warmwords.ThenshetookmypicturewithheriPhone.Allthe15memoriesandburiedhatred16inthinair.Ifelthersinceritywhich17withmine.Ourencounterleftmewithjoy. Sometimesyouhavetowalkbackintothepastjustforthe18justfortheclosure了结becausetimetherightattitudeandlife'sexperiencesdoheal19wounds.We'renotthesamepeople.Wearebetterpeople.Whatbetterwaythanto20forafewhourstofindthatout? 1A.Feeling B.Seeing C.Helping D.Making 2A.genuinely B.unhappily C.constantly D.luckily 3A.merrier B.stronger C.older D.wealthier 4A.content B.disappointed C.upset D.funny 5A.congratulate B.attend C.recognize D.understand 6A.Hopefully B.Unexpectedly C.Approximately D.Thankfully 7A.unite B.identify C.protect D.imagine 8A.memorable B.awkward C.changeable D.hopeful 9A.Unfortunately B.Obviously C.Certainly D.Consequently 10A.restriction B.competition C.invitation D.graduation 11A.thinkingof B.lookingfor C.runninginto D.pickingup 12A.failed B.trusted C.paused D.won 13A.tap B.squeeze C.hit D.mark 14A.reserved B.exchanged C.refused D.balanced 15A.happy B.visual C.bad D.lasting 16A.compromised B.melted C.recovered D.grew 17A.decorated B.represented C.matched D.compared 18A.exhibition B.routine C.service D.record 19A.severe B.previous C.mental D.flesh 20A.weigh B.boycott C.search D.reunite
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. MycousinLiMingtoldmehewouldbetakinghisdriver'stestagain.Heseemedconfidencealthoughhehavefailedhisfirstroadtest.Ifeltsympathyforhimthinkhemighthaveasamefearhedidlasttime.IencouragedhimthoughIwasnotsooptimisticabouttheirchances.Lateronhecalledsharethegoodnewsthathehadpassedit.Beforetheroadtestourfamilygatheredexcitedathishouse.Icongratulatedhimwithahug.Iaskedhimtodrivewithmeanywhereheliked.ThreeofourcousinpiledinwithusandwetookourfirstridewithLiMing.
Thereareabout6500languagesspokenthroughouttheworldbutabouthalfofthemareindangerofdisappearing. Oneoftheprimarycausesdrivinglanguagelossisthatsupportforlanguagecommunitiesdrasticallyvaries.Whilesomelanguagesarerecognizedbygovernmentsandtaughtinschoolsthemajoritygounrecognizedunsupportedanduntaughtleavingcommunitiesill﹣equippedtopasstheirlanguagesontofuturegenerations.Tsakonianadialect方言inGreecehasdeclinedtothepointthatonly100speakersremain. Whenalanguagedisappearsmanyotherthingscangoawayaswell.Forexamplepartsofacommunity'scultureknowledgeandidentitycanalsobelost. OneorganizationseekingtosaveworldlanguagesisWikitongueswhichwasfoundedasaschoolprojectbyDanielBogreUdellin2012whenhebeganrecordingshortoralhistoriesinNewYorktoexplorethecity'srichculturaldiversitywiththesimpleideatellmeaboutyourselforyourhomeinyournativelanguage.Whenhepostedthevideosonlinethechannelquicklygotwideattention. Therearecurrentlyover400languagesanddialectsrepresentedonWikitongues'channelandmorethan1500peoplefrom70differentcountrieshaveaddedvideostoit.Butthat'sfarfromenough.TheorganizationseekstoserveasanInternetresourcetokeepasmanylanguagesaspossiblealive.Udellbelievestheycanmakeithappen.Therearemanyexamplesoflanguagesthatdisappearedbutlaterreturnedtouse.Hebrewwentextinctinthe4thcenturyBCandwasrevived恢复inthe1800s.Nowonceagainit'sthemothertongueofhalfoftheworld'sJewishpopulationsaidUdell. 1WhatcanbeinferredaboutTsakonianinGreece? A.It'shardtospeakandunderstand. B.Itwilldefinitelydieoutinthefuture. C.It'snotallowedtospeakinGreece. D.Itlacksrecognitionandsupport. 2Whateffectmaybebroughtbytheextinctionoflanguages? A.Harmingfuturegenerations. B.Reducingculturaldiversity. C.Preventingdailycommunication. D.Changingschoolprojects. 3What'sthepurposeofWikitongues? A.Tosupportpeopleinsavingtheirlanguages. B.Torevivelanguagesthathavedisappeared. C.Torecordenoughshortoralhistories. D.Toexploretheworld'srichcultures. 4WhatdoesUdellwanttotellusbygivingHebrewasanexampleinthelastparagraph? A.Allextinctlanguageswillbebroughtbacktolife. B.It'spossibletopreventlanguagesfromdyingout. C.MorelanguageswillbepresentedonWikitongues'channel. D.Hebrewhasbecomeoneofthemostpopularlanguagesintheworld.
Iwouldn'tbethepersonIamtodayifInevertraveled.TravelinghasgivenmetonsofgreatlessonsthatI'11neverforget. 1.Appreciatinganotherculture Learningaboutanothercultureinschoolisonethingbutactuallyexperiencingitisanother.1Youcanvisitartmuseumswatchlandmarksorjuststopatacafé.Beforeyouknowityou'llpickuponlocalcustomsorfallinlovewithunfamiliarfoods. 2.Thepleasureofunpluggingfromsocialmedia Socialmediatakesupalotofourtimeandit'sreallydistractingandevendamaging.SoformewhenItravelIlovethefactthatI'moftencutofffromanyInternet.Istopcaringaboutwhatothersaredoingandinsteadfocusonhavingfun.2. 3.Exploringyourcapability能力 3Itbringsthebestoutofyou.Asashyperson.IfeelasenseofpridewhenImakefriendswithcompletestrangersortalkinbrokenforeignlanguages.Travellinghastrulychangedmeinthebestway.NowwhateverhappensI'mcapableofmeetingthechallenge! 4.Patience Ihavenevertakenavacationwherenothinggoeswrong.Ieverlostmyluggagegothopelesslyconfusedwithdirectionsandwaited5hoursonatrainthatbrokedownmidjourney.4Unexpectedthingscanhappenatanymoment.Theaccidentstravelingthrowsyourwayteachesyoutobemorepatientwithyoureverydayproblems. 5.Theworldisn'tasscaryasyouthink IfyouwatchthenewsasmuchasIdo.it'seasytostartthinkingthattheentireworldisascarydangerousplace.5Butingeneraltheaveragecountryisjustassafeastheoneyouliveinnow.Whyletyourfearpreventyou? A.Travellingisatransformingexperience. B.Lifedoesn'talwaysgoaccordingtoplan. C.Travellinghoweverletsusstopandenjoythemoment. D.Theworldisagiantplaceandweeachjustmakeupatinypartofit. E.Ifindalifebehindascreencannevercomparewithalifebeinglivedfully. G.It'simportantwhentravellingtokeepyourwisdomandtakespecialprecautions. F.Travelingexposesyoutopeopleandlifestylesquitedifferentfromthosebackathome.
Don'tansweritIsaidtoSam.Ourdoorintheinnercityisconstantlyknockedonourpreviousdoorinthesuburbsrarelyso.Samhasafull﹣timejobandcannotspendhisdaysansweringrequeststofixleakingbathsorcarrycashtothebank. SamopenedthedooranditwasMervin. There'sabirdonthesecondfloorhesaid.It'sintrouble. SamfollowedMervinupstairs.MervinpointedandturnedtoletSamlook.Itwasapigeonthemostcommonofallbirdsthebirdmostlikelytofoul弄脏yournewlywashedcar.Anditwasn'tflyingaway.Itwasstampingincircles.AsSambenttolookMervincoughedNumbertwo. Samaskedhimtorepeatthat.NumbertwoMervinsaid.Thepigeonhasbeensittinginhisownnumbertwoandnowit'sstucktohisfoot. Ithadrainedforfivedaysandthebirdwasyoung.Itcouldhavebeenshelteringinawetnestofitsownwastewhichhadthendriedonitsfootpreventingitfromflyingaway.Thepigeonmovedinafewmorecircles.Sambenttotakeanotherlook.MervinsaidAllrightthen.andwalkedaway. Whydoeseveryonethinkyoumustsolvetheproblemsaroundhere?IsaidtoSamwhenhereturnedwithhisstory.It'sabird.Justleaveitonthestairsandletnaturetakeitscourse.Samdidn'tagree.Thenhewenttothegarageandemptiedthecardboardboxcontainingourimportedcampingmats.Hereturnedwiththegraypigeoninthebox.Heshowedthebirdtoourchildrenandtheydecidedtokeepit. Theyputitsfootinthewarmwaterbathandgotridofitswaste.Immediatelythepigeoneruptedinabomboffeathersandbeganflying. 1Howdidtheauthorfeelabouttheknocks? A.Shefeltbored. B.Shewasfrightened. C.Shegotexcited. D.Shewassurprised. 2Whywasthepigeonmovingincircles? A.Itwaslearningtofly. B.Itwasbadlyinjured. C.Itgotcaughtintherain. D.Itwastrappedbyitswaste. 3WhatdidSamusethecardboardboxtodo? A.Shelterfromrain. B.GiveittoMervin. C.Washcampingmats. D.Makeanestforthebird. 4WhatcanwelearnaboutSamfromthetext? A.Hewasbrave. B.Hewasclever. C.Hewaswarm﹣hearted. D.Hewaseasy﹣going.
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. OnDecember10IwasatagrocerystorebuycanningjarsforaprojectIwasworkingon.TheassistantaskmewhatIwasgoingtousethejarsforandItoldheraboutmyplantomakingbathsaltsforfriendsasholidaygifts. Shewasinterestingandaskedmetolethertoknowhowitturnedout.Idecidedtodobetter.AfewdaybeforeChristmasIbroughthimagiftjarfullofthebathsaltsIhadmade.Shewasverysurprisedandhappythatshegavemehug.Thesmallactofkindnesscanrealmakeadifference.
为庆祝学校运动会开幕7年2班学生接受了制作小旗的任务原计划一半同学参加制作每天制作40面完成了三分之一以后全班同学一起参加结果比原计划提前一天半完成任务．假设每人制作的效率相同问原计划多少天完成制作小旗的任务
下列除去杂质的方法中不正确的是
ItwaslateAugustwhenIgotacallfromagrandmother.ShelivesinSeeleyLakeMontanaandshehasheardwehaveairpurifiers净化器withhigh﹣efficiencyparticulateairHEPAair﹣cleanersthatcanhelpwithsmoke.Sheneedsoneforthebaby'sroom.Iexplainedwedidn'thaveanyandtoldherhowtopurchaseone. Shecoughedandwentsilentwithdisappointmentbeforeaskinghowmuchtheycost.AlmosteverypersonItalktoinSeeleyLakehasthiscough.Thefamilydoesn'thavemuchmoneyshesaidbutshepromisedtoorderafilterforthechild.Smallfilters﹣onesthatcancleanabedroomofupto75squarefeet﹣costabout﹩70each. ThenextdaythewildfirethathadbeenburningforweeksintheLoloNationalForestnortheastoftownmovedclosertothewoman'sneighborhoodandthecountysheriff'sofficeevacuated疏散thearea.Iwonderedwhethertheair﹣cleanerwouldbetherewhenthefamilyreturnedhome.Iknewthesmokewouldbe. Asanair﹣qualityspecialistwiththeMissoulaCity﹣CountyHealthDepartmentinMontanamyjobistounderstandairpollutioncontrolitasmuchaspossibleandhelppeopleprotectthemselvesfromitseffects.Ifocusonsmokemanagementissuingpermitsforoutdoorburnsandupdatingresidentsaboutwhattoexpectfromthesmokewhenwildfiressenditourway. Neverhadweseensomanywildfiressoclosetohomeforsomanyweeks.TherearesixclassesontheEnvironmentalProtectionAgency'sAirQualityIndex指数goodmoderateunhealthyforsensitivegroupsunhealthyveryunhealthyanddangerous.SeeleyLake'sairreacheddangerousclassin18dayslastsummer. Lastyearwastroubledbywildfiresaroundthecountry.ThefiresthatstruckNorthernCaliforniaalonekilled44peopleandcausedmorethan﹩9billionindamage.Butthisisn'tjustarecentproblemnorisitlimitedtotheWest.Wildfireshit49statesin2017includingaswathfromFloridatoVirginia.Morethan9millionacresburnednationwidecomparedwiththeyearlyaverageof6.5millionacres. 1Whydidthegrandmothermakeacalltotheauthor? A.Topreventthewildfire. B.Tohelphermakeamove. C.Toaskforanairpurifier. D.Togetinformationaboutairpollution. 2Howdidthewomanfeelabouttheauthor'sreply? A.Angry. B.Hopeful. C.Excited. D.Disappointed. 3What'stheauthor'spurposeofwritingparagraph5? A.Toaddsomebackgroundinformation. B.Tosummarizethepreviousparagraphs. C.Tointroduceanewtopicfordiscussion. D.Tomakethereadersrealizethesituation. 4Comparedwiththeyearlyaveragetheburnedacresnationwidein2017roseby. A.about49% B.about38% C.about72% D.about52%
DoyouworkovertimeDoyouconstantlykeepyourselfengagedinsomethingDoyoufeellostifyoudon'thaveworktodoIfsuchisthecase1Chancesarethatyoumayhavedevelopedworkaholism沉迷工作.Actuallythereisabigdistinctionbetweenworkinghardandbeingaworkaholic. Workinghardinvolvesbeingorganizedfocusedgettingalotofworkdoneknowingwhentostopandhavingalifeotherthanwork.2Theyalwaysfindreasonsforworkingmorefeellostwithoutworktodoandhidefromproblemsthroughwork.Workisbroughthomefromtheofficewithalackofgoodcommunicationwithfellowworkersandfamilymembers.Theyhaveunbalancedone﹣dimensionallives. 3Itisusuallydefinedasstrongbehaviordespitenegativeconsequences.Theyaresometimespushedintotheirhabitbytheirworkbeliefsbyworkaholicrolemodelsandbyaworksystemthatautomaticallypermitsworkaholism.4Theyrewardworkerswithhigherpayandbetterbenefits.Inmanycompaniesworkersunwillingtoburnthemidnightoilareatrisk.Theyendangertheirjobsbyworkingnormalhoursonly. Accordingtosomepsychologyexpertsworkaholismcanbebothgoodandbadforus.5Andwegetpaidforitandpraisedforitwhichproducesgoodfeelingswemaynotnecessarilybeabletogetinotherpartsofourlives.AsamatteroffactworkaholismisaproblemthathasbeenevidentsincetheStoneAge. A.you'dbetterstopandhaveagoodrest. B.Itcanfuelasenseofself﹣worthandaccomplishment. C.Workaholicsontheotherhandareoftendisorganized. D.Workaholicslikethosewhoareconstantlydrunksufferfromacontrollinghabit. E.Manyworkersactuallywanttoworkovertimeinordertogetextrapay. F.Despitelipservicetothecontrarymostemployerswantloyalemployeeswhoworklongerhours. G.it'stimeforyoutoreflectonyouwaysofdealingwiththings.
Microplasticsaresmallplasticpiecesthathaveaccumulatedinthemarine海洋的environmentfollowingdecadesofpollution.Thesepiecescancausesignificantissuesformarinecreaturesthatingestthemincludinginflammation炎症reducedfeedingandweight﹣loss.Microplasticpollutionmayalsospreadfromorganismtoorganismwhenonecreatureiseatenbyothers.Sincethepiecescanbindtochemicalpollutantstheseassociatedpoisonscouldaccumulateinpredatorspecies. Mesopelagic中层的fishserveasafoodsourceforalargevarietyofmarineanimalsincludingswordfishdolphinssealsandseabirds.Typicallylivingatdepthsof200﹣1000metersthesefishswimtothesurfaceatnighttofeedandthenreturntodeeperwatersduringtheday.Throughtheseuprightmovementsmesopelagicfishplayakeyroleinthecyclingofcarbonandnutrientsfromthesurfacetothedeepsea﹣aprocessknownasbiogeochemicalcycling.Thismeanstheycouldspreadmicroplasticpollutionthroughoutthemarineecosystembycarryingmicroplasticsfromthesurfacedowntodeeperwatersaffectingdeep﹣seaorganisms. ToinvestigatethisfurtherresearcherssetouttocatchfishinaremoteareaoftheNorthwestAtlanticOcean.Theresearcherscaughtmesopelagicfishatvaryingdepthsandthenexaminedtheirstomachsformicroplasticsbackinthelab.Theyusedaparticularairfiltersoasnottointroduceplasticfibersintheairfromthelabenvironment. Theteamfoundalotofmicroplasticsinthefishstomachs.Astheresearcherswereextremelycarefultoclearpollutionwithfibersfromtheairtheywereconfidentthatthefishhadeatenthefibersintheseaallovertheworld. Theresearchersplanfurtherstudiestolearnmoreabouthowthesefishareingestingandspreadingmicroplastics.Itwillbeparticularlyinterestingtoseewhetherthefisheatthesemicroplasticsdirectlyasmistakenfoodsorwhethertheyeatthemthrougheatingotherspecieswhichhavepreviouslyeatenthemicroplastics. 1Whatdoestheunderlinedwordingestinparagraph1mean? A.Attack. B.Swallow. C.Ignore. D.Avoid. 2Whatdoesparagraph2mainlytalkabout? A.Howdeep﹣seafishfeedthemselves. B.WhyMesopelagicfishareimportant. C.Howmicroplasticsspreadtodeepsea. D.Howdangerousmicroplasticsaretothesea. 3Whatconclusiondidtheresearchersdrawfromthestudyonmesopelagicfish? A.Fishintheremoteareaaresafetoeat. B.Plasticfibersintheairmayenterfish. C.Theyareallpollutedbymicroplastics. D.Mesopelagicfishliveatvaryingdepths. 4Whatwillfurtherstudiesfocuson? A.InwhatwaymicroplasticsenterMesopelagicfish. B.Howseriouslymicroplasticsaffectseacreatures. C.Whetherfishwithmicroplasticsharmhumans. D.Howmicroplasticsspreadinthedeepocean.
FormygrandpaTatay's90thbirthdayourfamilythrewhimabigparty. We1thebackyardwithcolorfulflagssoitwouldlookliketheneighborhoodpartieswithwhichTatay2inhishomecountryofthePhilippines.We3abiglechonaroastedpig.Andtheguestswere4toweartraditionalFilipinoclothes. 5Iwasexcitedtowearanorangepatadyong﹣aPhilippineskirtandwrap﹣mywhitehusbandDarrenfromNashvilleTenn.felt6inhisbarongashirtwovenfrompineappleleaffibers.Myaunthadtoldallthegueststodressin7clothes. Ifeellikethisisculturalappropriationhesaidpullingthecollarandlookingaround8.Ihonestlyfeeluncomfortable. IcouldunderstandDarren's9ButwearingabarongtoTatay'sbirthdaypartythisIfeltwasnotappropriationbut10.Itfilledmewithgreat11toseemywhitehusbandintheclothingofmyfamily'stradition.Iknewmyfamilywas12too.MyunclelenthiscleanshirttoDarren.Mycousinswantedto13photoswithhim. I14himbysayinghewasexpressing15andasenseofunitywithmyFilipinofamily.Andwewerewearingtheseclothesasanactof16toTatay.Heislosinghis17﹣butbarongandpatadyongandlechonthesearesomeofthethingsthat18inhismind. InthatbarongDarren'sstandingnexttoTatay19thathewasmakingan20tounderstandandconnectwithmyfamily.Andthattomewasabeautifulthing. Afterallappreciatingdifferentcultureshelpsunderstandtheworld. 1A.shared B.decorated C.provided D.covered 2A.putup B.cameup C.broughtup D.grewup 3A.ordered B.raised C.kept D.caught 4A.allowed B.asked C.admitted D.found 5A.Since B.Once C.While D.When 6A.suitable B.comfortable C.stressful D.nervous 7A.traditional B.regular C.plain D.expensive 8A.patiently B.bravely C.tiredly D.worriedly 9A.argument B.condition C.anxiety D.curiosity 10A.difference B.appreciation C.influence D.expectation 11A.faith B.disappointment C.pride D.complaint 12A.excited B.interested C.embarrassed D.annoyed 13A.develop B.send C.take D.exchange 14A.comforted B.changed C.ignored D.attracted 15A.fear B.regret C.happiness D.support 16A.courage B.trust C.kindness D.devotion 17A.wealth B.memory C.home D.heart 18A.remain B.grow C.return D.disappear 19A.promised B.noticed C.sounded D.showed 20A.offer B.effort C.example D.excuse
下列实验能用如图表示的是
Duringtheperiodfrom1660through1800GreatBritainbecametheworld'sleader.Languageitselfbecamesubmittedtorulesduringthisperiod.ThisneedtofixtheEnglishlanguageisbestillustrated描述inthemakingofTheDictionaryoftheEnglishLanguagebySamuelJohnson.GuidestotheEnglishlanguagehadbeeninexistencebeforeJohnsonbeganhisprojectin1746.Thesehoweverwereoftenlittlemorethanlistsofhardwords.Whendefinitionsofcommonwordsweresuppliedtheywereoftenunhelpful.Forexampleahorsewasdefinedinanearlydictionaryasabeastwellknown. Johnsonchangedallthatbutthetaskwasnotaneasyone.Rentingahouseat17GoughSquareJohnsonbeganworkingintheworstofconditions.SupportedonlybyhispublisherJohnsonworkedontheDictionarywithfiveassistants.ComparedtotheFrenchAcademy'sdictionarywhichtookfortyworkersfifty﹣fiveyearstocomplete1639﹣1694Johnson'sdictionarywascompletedbyveryfewpeopleveryquickly. BalancedonachairwithonlythreelegsJohnsonsatagainstawallinaroomfilledwithbooks.Johnsonwouldreadwidelyfromthesebooksmarkpassagesillustratingtheuseofaparticularwordandgivethebookstohisassistantssothattheycouldcopythepassagesonslipsofpaper.TheseslipswerethenstucktoeightylargenotebooksunderthekeywordsthatJohnsonhadselected.FixingthewordbythismethodJohnsoncouldrecordawordsusageanditsdefinition. Howmanypassageswereused?AccordingtoJohnson'smodernbiographerWalterJacksonBatetheoriginaltotalnumbercouldhavebeenover240000.Howmanywordsweredefinedbythelexicographer?Over40000wordsappearedintwolargebooksinAprilof1755.DidJohnsonfullyunderstandthehugetaskhewasundertakingwhenhebegan?AshetoldhiscontemporarybiographerJamesBoswellIknewverywellwhatIwasundertakingandverywellhowtodoit﹣andhavedoneitverywell. 1WhatistheproblemofearlyEnglishdictionaries? A.Theyonlyoffersimplepictures. B.Theylistjustafewforeignwords. C.Theysimplygivesometranslations. D.Theyaddnomorethansomebigwords. 2Whatdoestheunderlinedwordlexicographerinparagraph4referto? A.Apublisher. B.Abiographer. C.Amakerofdictionaries. D.Anassistant. 3WhatcanweinferaboutSamuelJohnsonfromthetext? A.HestandardizedEnglish. B.Hecaredaboutauthorityalot. C.Hegainedmuchfinancialsupport. D.Hecomplainedofworkingconditions. 4Whatisthepurposeofthispassage? A.Todiscusstheproblemsofdictionaries. B.Toencouragepeopletoworkonaproject. C.Topersuadepeopletobuythenewdictionary. D.TointroducehowJohnsoncompletehisdictionary.
下列实验进行中的现象或实验原理正确的是
It'swellknowntocar﹣driversthatredmeansstopgreenmeansgoandyellowmeanshurryupandmakethatdamnlight.WhythosecolorsthoughTheanswerliesinthefactthattheearliesttrafficsignalsweredesignedfortrainsnotcars.Theywereredandgreengas﹣poweredandmorethanalittledangerousintheeventofaleak. Redisaninheritedsymbolfromrailroadswhichsymbolizesdangerinmanycultures.Asredhasthelongestwavelengthofanycoloronthevisiblespectrum光谱itcanbeseenfromagreaterdistancethanothercolors.Redhasmeantstopsincelongbeforecarsexistedwithtrainsignals'useofreddatingbacktothedayswhenmechanicalarmsliftedandloweredtoindicatewhethertherailaheadwasclear. Greenmeanscautionatfirst.Itswavelengthisnexttoandshorterthanyellow'sonthevisiblespectrummeaningit'sstilleasiertoseethananycolorotherthanredandyellow.Backintheearlydaysofrailwaylightsgreenoriginallymeantcautionwhiletheall﹣clearlightwaswellclearorwhite.Legendhasitthatseveraldisastrouscollisionshappenedafteranengineermistookstarsinthenighthorizonforanall﹣clear.Thusgreenbecamegoandforalongtimerailwaysusedonlygreenandredtosignaltrains. Fromtheearliestdaysofmotoringupuntilthemid﹣1900snotallstopsignswerered﹣manywereyellowbecauseatnightitwasallbutimpossibletoseearedstopsigninapoorlylitarea.In1915theyellowstop﹣signcrazebeganinDetroitacitythatfiveyearslaterinstalleditsfirstelectrictrafficsignalwhichhappenedtoincludetheveryfirstyellowtrafficlight. ButwhatofthosemysteriousyellowstopsignsAsmaterialsandtechnologiesevolvedtheabilitytoproducehighlyreflectivesignsmeantthatredcouldregainitsnaturalspotinthesignhierarchy等级leavingthestill﹣highly﹣visibleyellowtothedomain领域ofcaution.That'swhyschoolzonesandbusescrosswalksandotherimportantwarningsareyellowtoday. 1Whatweretrafficlightsoriginallydesignedfor A.Trains. B.Cars. C.Planes. D.Ships. 2WhatisthemainreasonforthelongapplicationofredtomeanSTOP A.Itsgeneralculturalmeaning. B.Itsassociationwithgoodluck. C.Itslongvisiblewavelength. D.Itspopularitywithallpeoples. 3Whatdoweknowaboutthecolorsintrafficlights A.Themeaningoftheredcolorisculture﹣specific. B.Yellowbeganitsroleasstopsignsinthe1900s. C.Green'swavelengthisjustsecondtothatofred. D.Green'sroleinlightshaschangedconsiderably. 4Whatdoesthepassagemainlytalkabout A.Thesignificanceofroadtrafficsigns. B.Thehistoryofrailroadtransportation. C.Thesymbolicmeaningsofdifferentcolors. D.Theoriginanddevelopmentoftrafficlights.
假如你是李华你的笔友Peter听说高考即将来临想了解一下你们如何备战高考请你回一封邮件说明相关情视内容包括 1.想方设法掌握知识; 2.保持精力充沛 …… 注意1.词数100左右 2.可以适当增加细节以使行文连贯; 3.开头和结尾已给出不计入总词数. DearPeter Iammorethandelightedtohearfromyou. Lookingforwardtoyourearlyreply! Yours LiHua
HerearesomefamousfestivalsfortouriststoselectintheUnitedStatesinthecomingsummer. SanFranciscoFilmFestival Thefilmsatthisunusualeventhaveavarietyofmusicalaccompanimentsincludingpianoviolinandguitar.Afewclassicsilentmoviesareshowninthefilmfestival.Ifyouwanttoseethemallyouaresupposedtohaveafestivalpass. May29toJune1;www.silentfilm.Org UnionStreetFestival ThispopularstreetfairextendsmorethansixblocksofthecityinthefashionableshoppingareaofUnionStreet.Thethemesincludebeerandwinetastingandotherseparateones﹣fashioncuisinetechlocalcraftfitnesshealthandsoon. June7to10;www.Unionstreetfestival.com NorthBeachFestival ThisfestivalisSanFrancisco'soldeststreetpartywheretouristscanenjoyavarietyofliveentertainmenttastyfoodhandcraftsandartworks.LocatedintheLittleItalydistrictknownforitsassociationswiththeBeatGenerationfestivalgoersareguaranteedplentyofgoodItalianfood.BesidesthereisalsoaneventcalledblessingoftheanimalsaSanFranciscotraditionwhichtakesplaceattheNationalShrineofSaintFrancisofAssisi610VallejoStreetat2pmonthedaysofthefestival. June14to16;www.Northbeat.Org SternGroveFestival ThisfestivalisrecognizedastheoldestsummerartfestivalinAmerica.Itincludesplentyofperformancesfromthelocalsymphonyorchestrastowell﹣knownartistssuchasFrankHurley. SundaysfromJune22toAugust24;www.Sterngrove.org 1Whichofthefollowingfestivalscoversthemostthemes A.SanFranciscoSilentFilmFestival. B.UnionStreetFestival. C.NorthBeachFestival. D.SternGroveFestival. 2WhatistrueaboutNorthBeachFestival A.Ithasthelongesthistoryoffood. B.Hands﹣onactivitiesareguaranteed. C.Exoticfoodisavailabletovisitors. D.Foreignculturesarepresentedinit. 3WhencanyouenjoytheoldestartfestivalintheUnitedStates A.WeekdaysinJune. B.SaturdaysinAugust. C.WeekendsinMay. D.SundaysinJuly.
假如你是李华你的英国朋友Tom看到你在微信上分享了学校最近举行的主题为建造绿色家园的植树活动发邮件向你询问有关情况.请你用英语回复邮件内容包括 1.活动情况简介2.活动的意义. 注意1.词数100左右 2.可以适当增加细节以使行文连贯.
Manykidslovetolistentomusicanddance.Butforchildrenwithspecialmedicalneedsjoiningina1traditiondanceclasscanbedifficult. Thanks2physicaltherapist治疗师KellieLightfootyoungpeopleinNortheastOhiohavethebenefitofaspecialprogramcalledDanceUnlimitedLightfootfoundedtheprogramatAkronChildren'sHospitalin2012.Itgiveskidsagedfourandupachance3dancewhilestillgettingthebenefitsofphysicaltherapy. Dancegoesbeyondmeetingthekids'physicalneeds.Duringclasstheymeetotherkidsbuild4confidentandmakefriendswhichhelpalotintreatingtheirdiseases. Thestudentshavetwobigpublicperformanceseachyear.AtarecentperformanceinAkronthedancers'hardwork5payoffonstageallowingthemtoshineinfrontofpeople. Lightfoot6starteddancingbeforetheageofthreeisworkinghardtohelpchildrenwithspecialneeds.IjustalwayswantedtocombinethetwothingsthatIloveandIfeellikethisis7Iammeanttodoshesaid. Gettingallofthekids8involveintheclassrequiresateamwhich9makeupoftherapistsdancersandordinarypeople.Theyallactasdanceassistantssothatallofthechildrencanjoinin. LightfoothopestoexpandDanceUnlimitedsothatmorekidswithphysicalproblemscan10possiblereachtheirfullpotential.
工人小李加工一批零件如果每天做50个要比原计划多做8天才能完成如果每天做60个就可提前5天完成问这批零件共有多少个
A～E为教案备课库常见的物质他们有如图所示的转化关系图中“﹣”表示物质间能发生反应“→”表示物质间的转化．其中AB都是黑色固体C的固态俗称干冰D溶于水会形成蓝色溶液常用于配制一种具有杀菌作用的农药．请回答 1物质C的化学式是． 2物质E所属的类别可能是写一种物质的类别． 3写出下列反应的化学方程式①②．
下列对有关事实的解释错误的是
ThreehundredyearsagoMaohouorhairymonkeysquicklybecamemuchlovedbythepeopleinBeijing.Howdidpeoplecomeup1them Thestory2gothattheshopkeeperofaChinesemedicineshopoftenshoutedathisemployees.Oneeveninganapprentice学徒wastidyinguptheingredients原料3usetomakeChinesemedicinesintheshop.Tokilltimehefound4hemakingalittlefigureoutofthefeatheryflowersandtheheadandlegsofacicada's蝉skin.Theapprenticeshowedittohiscolleagues5jokethatitlookedliketheirbad﹣temperedboss. Thelittlethingquicklybecamesuch6hitthattheystartedmakingmorefigures.ThusBeijing'sunbelievablehairymonkeymakingcameinto7exist. Nowadayshairymonkeysarefarfromthemostpopularchildren'sgiftsonthemarketinBeijing.Mass﹣produced8toyhaveobviouslyreducedthedemandforhandmadefigures.Butthat'snottosaythatMaohouhas9completediedout.Walkamongthesellersattoday'stemplefairsinBeijingandyoumightstillfindafewplacessellinghairymonkeys10arewithoutdoubtoneofthecity'smostamazingcrafts.
下列有关水的说法中正确的是
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