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计划在某水库建一座至多安装3台发电机的水电站，过去50年的水文资料显示，水库年入流量xOy（年入流量：一年内上游来水与库区降水之和（单位：亿立方米）都在40以上．其中，不足80的年份有10年，不低于...
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高三下学期数学《》真题及答案
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计划在某水库建一座至多安装 3 台发电机的水电站过去 50 年的水文资料显示水库年入流量 X 年入
一水电站额定的工作水头H=150m额定流量Q=160m3/s水轮机效率η水=0.85发电机效率η电=
计划在某水库建一座至多安装3台发电机的水电站过去50年的水文资料显示水库年入流量年入流量一年内上游来
计划在某水库建一座至多安装3台发电机的水电站过去50年的水文资料显示水库年入流量X年入流量一年内上
某水电站装有4台机组主变压器采用发电机一变压器之间单元接线发电机额定电压为15.75kV1号和3号发
需装设避雷器
需装设2组避雷器
需装设1组避雷器
无需装设避雷器
水电站装配场的面积主要取决于1台机组解体大修时安放发电机转子水轮机顶盖和发电机下机架四大件场地的要求
水电站的主机包括
水轮机与发电机
水轮机与调速器
机盘旁与发电机
发电机与调速器
水电站厂房的发电机层必须高于下游尾水位
水电站的类型可按等方式进行划分
水轮发电机组的工作水头大小
水库的调节能力
水电站建筑物的组成特征
水电站的布置型式
水轮发电机组的设计水头大小
三峡水电站是利用大坝水拦住使水位升高从水库流下的水带动发电机发电这说明被大坝拦在水库的水具有水很难被
水电站扩建项目某水电站项目于2003年验收现有4台600MW发电机组水库淹没面积120km安排移民3
某水电站进水口的正常水位是1675m厂房下游水位是1575m发电机引用流量Q＝1000m3／s水电站
计划在某水库建一座至多安装3台发电机的水电站过去50年的水文资料显示水年入流量X.年入流量一年内上游
计划在某水库建一座至多安装 3 台发电机的水电站.过去 50 年的水文资料显示水库年入流量 X 年入
某水电站装有4台机组4台主变采用发电机一变压器之间单元接线发电机额定电压为15.75kV1号和3号发
需装设避雷器
需装设二组避雷器
需装设一组避雷器
无须装设避雷器
计划在某水库建一座至多安装3台发电机的水电站.过去50年的水文资料显示水库年入流量X年入流量一年内上
对于低水头大流量的水电站控制水电站主厂房机组间距的主要因素是
发电机尺寸或蜗壳尺寸
蜗壳尺寸或尾水管尺寸
尾水管尺寸过主阀尺寸
主阀尺寸或发电机尺寸
将发电用水自水库输送给水轮机发电机组的建筑物是
水电站引水建筑物
水电站平水建筑物
水电站进水建筑物
水电站发电建筑物
首先研制了风力发电机年丹麦建成了世界上第一座风力发电站
黄河上游第一座大型梯级电站是
刘家峡水电站
龙羊峡水电站
三门峡水库
小浪底水库
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5分After61graduatefromUniversityDavidHolmeswenttoChinatostudyChineseatBeijingLanguageandCultureUniversity.Twoyears62hewasabletospeak63fluentlyChinese.Upon64finishhisstudieshestartedtravelinginChina.InChinahedeveloped65interestinteachingEnglishtoChinesestudents.66hereturnedtoBritaintwomonthsagohebrought67fromChinamanyinterestingbookspaintingsandphotos.Hedonatedmostofthemtoourschoollibrary.Thepaintings68Daviddonatedtotheschoolarebeingshowninthe69exhibitroom.TeachersandstudentsatourschoolwishtothankDavidforhis70kind. 61. 62. 63. 64. 65. 66. 67. 68. 69. 70.
10分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. 增加把缺词处加个漏字符号∧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处起不记分. DearMike YousaidyouwanttoknowalotabouttheEnglishClubofourschool.ItwasthreeyearsagowhentheEnglishClubwasborn.Itwasfoundtoimprovestudents'interestinEnglish.ThoseinterestedinEnglishgottogetherinthemultimediaclassroomeverySaturdayafternoon.Therearemanyactivitiesholdinginit.StudentscanwatchvariouslyEnglishfilms.TheycanaswellaslearntosingEnglishsongswhichcanhelpthemlearnEnglishwordbyheart.Inadditionmanytopicscanbediscussedthereinalanguage.Howdoyoulikeourclub?I'mlookingforwardtoearlyreply. Yours LiHua.
在某2L恒容密团容器中充入2molXg和1molYg发生反应2Xg+Yg⇌3Zg△H反应过程中持续升高温度测得混合体系中X的体积分数与温度的关系如图所示下列推断正确的是
.5分Theoldman'ssoncametothankthepolicemanwithhelphefinallyfoundhismother.
6分ProudlyreadingmywordsIglancedaroundtheroomonlytofindmyclassmatesbearingbigsmilesontheirfacesandtearsintheireyes.ConfusedIglancedtowardmystone﹣facedteacher.HavingnochoiceIslowlyraisedthereportIhadslavedoverhopingtohidemyself.Whatcouldbecausingeveryonetoactthisway? QuicklyIflashedbacktothedayMissLancelotgavemethetask.ThiswasthefirstrealtalkIreceivedinmynewschool.ItseemedsimplegoontheInternetandfindinformationaboutamannamedGeorgeWashington.SincemyideaofhistorycamefromanancientteacherinmyhomecountryIhadneverheardofthatnamebefore.AsIsearchedthenameofthisfellowitbecameevidentthatthereweretwopeoplebearingthesamenamewholookedcompletelydifferent!OneinventedhundredsofusesforpeanutswhiletheotherledsomesortofarmyacrossAmerica.Istaredatthescreenwonderingwhichonemyteachermeant.Icalledmygrandfatherforagoldenpieceofadviceflip掷acoin.Heads﹣thecommanderandtails﹣thepeanutsguy.Ah!TailsmyreportwouldbeaboutthegreatmanwhoinventedpeanutbutterGeorgeWashington WeekslaterstandingbeforethisunfriendlymassIwastotallylost.OhwellIloweredthepaperandsatdownatmydeskburningtofindoutwhatIhaddonewrong.AsaclassmatebeganhisreportitallbecameclearMyreportisonGeorgeWashingtonthemanwhostartedtheAmericanRevolution.Thewholeworldbecamequite!HowcouldIknowthatshemeantthatGeorgeWashington? Obviouslymygradewasawful.HeartbrokenbutfearlessIdecidedtoturnthisaround.ItalkedtoMissLancelotbutsheinsistedNore﹣dosnonewgrade.IfeltthatthepunishmentwasnotjustifiedandIbelievedIdeservedasecondchance.ConsequentlyIthrewmyselfheartilyintomyworkfortherestoftheschoolyear.TenmonthslaterthatchanceunfoldedasIfoundmyselfsittingintheheadmaster'sofficewithmygrandfathernowhavinganentirelydifferentconversation.Ismiledandflashedbacktotheembarrassingmomentatthebeginningoftheyearastheheadmasterinformedmeofmychancetoskipthesixthgrade.Justiceissweet! 33.Whywastheauthorconfusedaboutthetask? A.HewasunfamiliarwithAmericanhistory. B.Hefollowedtheadviceandflippedacoin. C.Heforgothisteacher'sinstruction. D.Hewasnewattheschool. 34.TheunderlinedwordburninginPara.3probablymeans. A.annoyed B.ashamed C.ready D.eager 35.Intheendtheauthorturnedthingsaround. A.byredoinghistask B.throughhisownefforts C.withthehelpofhisgrandfather D.undertheguidanceofhisheadmaster.
.5分IwillhirethemantheysayisagoodEnglishspeaker.
5分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. ThedaybeforeyesterdayIwenttothebookstorewhereisnearourschooltobuyareferencebook.ItwasSaturdaysotherewasmanypeople.WiththehelpabouttheshopassistantsIquicklygotthebookIneeded.IwasabouttoleavewhenIfoundsomeonetryingtostealamanmoney.AlthoughIwasnervousbutItriedtothinkofawaytohelphim.Suddenlyagoodideacameme.Isteppedontheman'sfootonpurpose.AsIexpectedtheman'sscreamgivesthethiefafrightwhoquickwalkedoutoftheshop.Afterhearmyexplanationthemansmiledandshowedgreatgratitudetohim.
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6分 EVENTS LongMarchexhibit TheShanghaiHistoryMuseumisputtingonanexhibitiontomarkthe60thanniversaryoftheLongMarch.Onshowaremorethan220photosand40itemsthatexplainwithpictureshowthecommunistRedArmydrewbackfromitsbesieged被围困的basesinJiangxiProvinceandfoughtitswaytonorthernShanxiProvinceinthemid﹣1930s.ExplanationsareallinChinese.TheshowwillendonNovember20. Time1000am﹣400pmAddress1286HongqiaoRoad Admission8yuanforChinese/15yuanforforeigners Thaielephants EightelephantsfromThailandareentertainingvisitorsatChangfengParkbyridingbikesplayingbasketballbalancingonabeamdancingandblowingamouthorgan.Peopleareencouragedtohaveatug﹣of﹣war拔河比赛withtheanimalsorlieonthegroundandhavetheelephantswalkoverthem.Theelephantsgivethreeshowsadayat930am330pmand800pmandthereisanadditionalshowatl30pmatweekends.TheshowwillendonNovember15. Address189DaduheRoadAdmission30﹣40yuan Dancingdolphins DolphinsjumpingfromthewatertotouchaballswayingtheirbodiestomusickissingpeopleanddoingmathbytappingtheirtailshavemadethedolphinariuminPeaceParkanattractionforchildren.Sealsandsealionsalsoperform. Hours1030am400pmand730pm Admission20yuanforadultsand10yuanforchildren. 1.IfyougotovisittheLongMarchexhibitionwithanAustralianhowmuchwillyoupayaltogetherfortheadmission? A.16yuan. B.30yuan. C.23yuan. D.20yuan. 2.WhichofthefollowingisNOTdonebytheThaielephants? A.Ridingbicycles. B.Blowingamouth﹣organ. C.Havingatug﹣of﹣warwithpeople. D.Doingmath. 3.ThedolphinariuminPeaceParkisahallwhereyoucansee. A.onlysealsandsealionsperform B.onlydolphinsperform C.notonlydolphinsbutalsosealsandsealionsperform D.onlysealsperform
.5分Ihaven'tmethimforagesbuthismotherseehimeveryday.
30分Mrs.Jonesisa92﹣year﹣oldlady.Sheisblindandherhusbandpassedawayrecentlywhichmadeit41 forhertomovetoanursinghometoday.Aftermanyhoursofwaiting42inthehallofthenursinghomeshesmiledsweetlywhentoldherroomwas43.AsshewenttotheelevatoronherwheelchairIprovidedasimple44ofhersmallroom. I45itshestatedwiththeenthusiasmofaneight﹣year﹣oldhavingjustbeen46withanewpetdog. Mrs.Jonesyouhaven't47theroom…justwait. Thatdoesn'thaveanythingtodo48itshereplied.49issomethingyoudecideonaheadoftime.WhetherIlikemyroomornotdoesn't50howthefurnitureisarranged.It'showIarrangemy51.Ihavealready52toloveit.It'sa53ImakeeverymorningwhenIwakeup.Ihaveachoiceto54everymorning.Icaneither55thedayinbedthinkingofthedifficultyIhavewiththepartsmybodythatnolongerwork56getoutofbedandbe57fortheonesthatdowork.Eachdayisagiftand58myeyesopenI'llfocusonthenewdayandallthehappymemoriesI'vestored. Andwithasmile.ShecontinuedOldageislikeabankaccount.Youwithdraw取出fromwhatyou'veputin.Somy59toyouwouldbetostorealotofhappinessinthebankaccountofmemories.RememberfivesimplerulestobehappyFreeyourheartfromhatred.Freeyourmindfromworries.Livesimply.Givemore.Expect60. 41.A.important B.difficult C.necessary D.effective 42.A.regularly B.constantly C.generously D.patiently 43.A.ready B.cheap C.big D.far 44.A.position B.description C.location D.conversation 45.A.know B.need C.love D.believe 46.A.supported B.presented C.shared D.required 47.A.bought B.seen C.got D.booked 48.A.in B.on C.with D.for 49.A.Happiness B.Success C.Chance D.Fortune 50.A.leadto B.comefrom C.makefor D.dependon 51.A.mind B.room C.work D.life 52.A.promised B.decided C.refused D.demanded 53.A.plan B.wish C.decision D.goal 54.A.make B.take C.draw D.give 55.A.live B.lose C.miss D.spend 56.A.or B.and C.but D.so 57.A.grateful B.hopeful C.confident D.positive 58.A.asfaras B.aslongas C.evenif D.incase 59.A.hope B.warn C.advise D.offer 60.A.fewer B.higher C.greater D.less
catchsight看见
8分BeforeIhadmysonIspenttwoyearsworkingwithchildrenwithdisabilities.Ilearnedthatshoutingandthreatsofpunishmentwouldresultinadisaster.Comingupagainsttheirbehaviourcouldonlymakethejobharderandtheirbehaviourmoreextreme.Ifoundsomethingthatworkedthough. Therewasaverynaughtyboyinthenurseryandateacherwhowasgenerallyveryconfidentwiththechildrenwasaskedtotakechargeofhim.Onedaytheboyjoinedasessionintheroomnexttomine.Hisappearancecreatedanatmosphereoftension.Hespenttheentiresessionrunningaroundhittingandkickinganddestroyingproperty. Iwasinthecraftroomworkingwithsomeotherchildrenwhenmyco﹣workertoldmethatthisboy'steacherwasintearsandcouldnotgetcontrolofthesituation.Asweweretalkingtheboyranin.Itoldmyco﹣workerthatIwouldtakecareofhim. Iclosedthedoor.Hewasfullofenergythrowingthingsaroundandmakingahugemess.ButIcouldseethathewasdoingallthesetoannoyme.Heneededconnectionandthiswastheonlywayheknewhowtoaskforit.SoIsatbackdownandkeptquiet.Thenhesloweddownandbeganmakingarocket.Italkedtohimaboutit.WecontinuedlikethisforafewminutesbeforeIslippedintotheconversation Sowhathappenedtoday? Itwaspurelyaquestionnoblameorangerinmytone.IbelievethatifIhadcriticizedhimthegatethatwasslowlyopeningwouldhaveshutfirmlyclosed.Hetoldmethattheteacherdidn'tlethimdowhatheknewwellduetosafetybutaskedhimtodowhathedisliked.Healsoadmittedthathehadenjoyedmakingherrunaroundandsawitasagame.Iexplainedthathisteacherhadnotseenitasagameandwasveryupset.Thisagainwasstatedsimplyasafact.Isuggestedthatnexttimehehadasessionhetalkaboutwhathehopedtodoatthestartwhichmightbeeasierforeveryone.Heagreedandwasquietforamoment.Thenhelookedatmewithtearsinhiseyesbeforequietlyaskingifhecouldgotofindhisteachertoapologize. 51.Theboymadetroubleforhisteacherbecausehe. A.wasaccusedofdestroyingproperty B.wastoldnottoyellatotherchildren C.wasmadetodothingsagainsthiswill D.wasblamedforcreatinganairoftension 52.Whydidn'ttheauthordoanythingabouttheboy'sbadbehavioratfirst? A.Shedidn'twanttomakeitworse. B.Shedidn'tmindthehugemessatall. C.Shewastiredofshoutingandthreats. D.Shehadn'tthoughtofacopingstrategy. 53.Theauthormanagedtogettheboytotalktoherby. A.playinggameswithhim B.givinghimagoodsuggestion C.describinghisteacher'sfeelings D.avoidingmakingcriticalremarks 54.Whydidtheboyhavetearsinhiseyesintheend? A.Hewassorryabouthisreputation. B.Hewasregretfulabouthisbehavior. C.Hewasfearfuloftheauthor'swarning. D.Hewassadfortheauthor'smisunderstanding.
8分HalfayearbeforegraduationfromcollegemysonDavidbegantoseekajob.Duetothefinancialcrisisthecompetitionwasever﹣fierce.Mysontargetedacompanythatwaslocatedinacoastalcity.ItwasintendedtoemployonlyonepersonamongmorethantwentycandidatesIsaidtoDavidYoushouldnotharbortoomuchhopeforfearthatyouwouldfeelterriblydisappointedwhenyoufail.HesaidtomeIamnotafraidofdisappointment.AslongasItrytherewillalwaysbehope! Threeyoungmencouldenterthefinalroundwhichwouldlaterdecideonepersontobeemployed.EverythingseemedtogoquitewellandDavidenteredthefinalroundinaweek. Unexpectedlytheinterviewwasunbelievablysimpleduringwhichtheintervieweronlychattedwiththemforawhile.Theinterviewstrategiesmysonpreparedwerenotusefulatall.Theinterviewersaidthecompanywouldinformthemoftheresultin3days.OnthemorningofthethirddayDavidreceivedthetextfromthecompanythathewasnotemployed.Davidfeltdisappointed. InnightfallthatdayDavidsuddenlytoldmeexcitedlyonphonethathehadbeenemployed.GreatlysurprisedIaskedhimWhat'sthewholematter?Davidtoldmethathereceivedanothertextsayingthathewasemployed.Davidfeltveryconfusedaboutit.Laterhefoundoutthefirsttextsenttohimwasalsopartofthetestintheinterview.ThreemenreceivedthesametextthismorningandonlyDavid'sreplywassatisfyingtothecompany.IaskedmysonHowdidallofyourreply?MysonsaidOnedidnotreply.Theothersaid‘Goodbye'andIsaid‘Thankyou'. OnlythendidIknowthatmyson'shopecameinthatway.ThatiswhenyoufeeldisappointeddonotforgettosayThankyoutotheonewhodisappointsyou.ActuallyitisapieceofcaketosayThankyou.SayingThankyoushowsrespectforothers'workanddemonstratesyourgrandgenerosity.Thereforewhileunderthesameconditionyouwillgettheupperhandintermsofopportunitiescomparedwithothers! 28.WhatcanwelearnaboutDavidfromthepassage? A.BeingshortofmoneyDavidwaseagertofindajob. B.Hewantedtoworkforacompanyinthelocalcity. C.Hewasnothopefulofgettingthejob. D.Hetookapositiveattitudetowardsfailure. 29.WhichofthefollowingistrueaboutDavid'sfinalroundinterview? A.Davidwasnervousbecausethecompetitionwasreallyfierce. B.David'spreparationsfortheinterviewwerenotused. C.Thethreeyoungmenperformedequallywell. D.Theresultwasannouncedonthespot. 30.WhenDavidgotthejobofferhefeltatfirst. A.excitedB.puzzledC.nervousD.pleased 31.Whatcanbethebesttitleofthepassage? A.SunshineAlwaysAppearsAfterStorm B.NeverGiveUpHope C.TheMagicPowerofThankYou D.AYoungManAndHisHope.
化学与生活社会密切相关．下列说法错误的是
某研究性学习小组的同学通过对亚硫酸钠组成元素的价态进行分析后认为Na2SO3溶液在存放过程中有可能变质若已变质则相应反应的化学方程式． 1甲同学设计了如下两种方案来检验Na2SO3溶液是否变质． 方案Ⅰ取样加入稀盐酸有气泡生成认为Na2SO3溶液没有变质． 方案Ⅱ取样加入氯化钡溶液有白色沉淀生成认为Na2SO3溶液完全变质． 乙同学认为上述两种方案均不合理乙同学作出判断的依据分别是方案Ⅰ 方案Ⅱ． 2乙同学设计如图所示装置夹持装置已略去探究Na2SO3溶液是否变质量取60mL标签上注明为1.0mol•L﹣1的Na2SO溶液放入A装置中通过测量生成的SO2质量的方法来判断其是否变质． ①D装置的作用是分液漏斗中应加入足量的填字母 a．浓硝酸b．65%硫酸 c．浓盐酸d．20%硫酸 ②若实验前后测得C装置增重3.2g则Na2SO3变质的百分率是． 3丙同学认为若只是确定Na2SO3是否变质乙的方案太复杂了他认为只需要试管胶头滴管盐酸及氯化钡溶液就可以达到目的不考虑对环境的影响请你发表自己的看法若不同意请说明理由若同意请写出主要操作现象及结论．
accountfor.
10分请你修改下面短文共有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子符号∧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10处多者从第11处起不计分. Peopleusedtocommunicatewitheachotherthroughlettersandpublicphones.SonowadaystheyusemobilephonesandtheInternetinsteadof.Thischangeincommunicationhavegoodeffectsonourworksandlife.ComparingwithlettersandpublicphonesmobilephonesandtheInternetarefastandmuchmoreconvenient.Ifyoumissedyourgrandmotheryoujusttakeoutyourphoneandsayhellotohim.Andshewillbehappytohearyourvoice.Ifyouwanttoplaceorderwithaforeigncompanyyoucane﹣mailthemessage.It'llbeminutesafteryougettheirreply.
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1分Nodon'ttellthemanything.Anyhowtheydidn'ttrustme.Theydon't84anexplanation.
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作文.文中共有10处错误每句最多有一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︿并在横线上写出所加的词. 删除把多余的词用斜线\划掉.在该行右边横线上写出该词并也用斜线划掉 修改在错的词下划一横线在该行右边横线上写出改正后的词. IwastakingatraintoLondon'sVictoriaStation.Ihadnoticedthatthecarriagewasnoiseandfilledwithpeople. Beforelongatraininspectorcomestocheckourtickets.Apassengerrealizedhecouldn'tfindhisticketbutbecamequiteupset.Theneveryoneinthecarriagebegansearchingtheticketwhichwaseventuallyfoundunderaseatseveralrowsfromhisowner.Thepersonwhofoundaticketsmiledwithpleasureathissuccess. Nooneinthecarriagehadpreviousspokentoorevennoticedtheticket﹣ownerbefore.Yettheyhadsoquicklyofferedthestrangerstheirhelp.Ifwecouldshowconcerntoothersonneedtheworldwouldbeabetterplacetolivein.
下列有关离子方程式正确的是
6分AlongtheriverbanksoftheAmazonandtheOrinocotherelivesabirdthatswimsbeforeitcanflyflieslikeafatchickeneatsgreenleavehasthestomachofacowandhasclawsonitswingswhenyoung.Theybuildtheirhomesabout4.6mabovetheriveranimportantfeatureforthesafetyoftheyoung.Itiscalledthehoatzin. Inappearancethebirdsofbothsexeslookverymuchalikewithbrownonthebackandcreamandredontheunderside.Theheadissmallwithalargesetoffeathersonthetopbrightredeyesandblueskin.Itsnearestrelativesarethecommonbirdscuckoos.Itsmoststrikingfeaturethoughisonlyfoundintheyoung. Babyhoatzinshaveaclawontheleadingedgeofeachwingandanotherattheendofeachwingtip.Usingthesefourclawstogetherwiththebeak喙theycanclimbaboutinthebusheslookingverymuchlikeprimitivebirdsmusthavedone.Whentheyounghoatzinshavelearnedtoflytheylosetheirclaws. DuringthedriermonthsbetweenDecemberandMarchhoatzinsflyabouttheforestingroupsof20to30birdsbutinAprilwhentherainyseasonbeginstheycollecttogetherinsmallerlivingunitsoftwotosevenbirdsforproducingpurposes. 21.Whatisthetextmainlyabout? A.Hoatzinsindryandrainyseasons. B.Therelativesandenemiesofhoatzins. C.PrimitivebirdsandhoatzinsoftheAmazon. D.Theappearanceandlivinghabitsofhoatzins. 22.Younghoatzinsaredifferentfromtheirparentsinthat. A.theylooklikeyoungcuckoos B.theyhaveclawsonthewings C.theyeatalotlikeacow D.theyliveonriverbanks 23.Whatcanweinferaboutprimitivebirdsfromthetext? A.Theyhadclawstohelpthemclimb. B.Theycouldflylongdistances. C.Theyhadfourwingslikehoatzins. D.Theyhadaheadwithlongfeathersonthetop. 24.Whydohoatzinscollecttogetherinsmallergroupswhentherainyseasoncomes? A.Tofindmorefood. B.Toprotectthemselvesbetter. C.Tokeepthemselveswarm. D.Toproducetheiryoung.
下列有关化学用语使用正确的是
1分指出下列句子属于哪种基本句型.回答可写汉字 IsawMrWanggetonthebus..
10分Michael'sbirthdaywascomingsoonsoheaskedhisdadforabicyclesothathewouldn'thavetowalktoschoolanymore.36Michaelgotabookinsteadbuthedidnotcomplain抱怨. OnebrightandsunnydaywhileMichaelwaswalkingpastabookstoreonhiswaytoschoolhesawabigboyonabike.Thebikewastoosmallfortheboy.37TheboywasastudentinMichael'sschool.Michaelrecognizedhim.Theboy'snamewasWilliam.Hislegseemedtohavebroken.MichaelpickedupWilliam'sbikewhichwasnotdamagedandrodetothenearbyhospitaltogethelp38.MichaelrodeWilliam'sbiketoschoolsohewouldnotbelateforclass. AfterschoolMichaelquicklyrodethebicycletoWilliam'shousewithabookforhim.39Buthehadtoputsomemedicineonhislegandstayinbedforsometime. ToMichael'ssurpriseWilliamwasgettinganewbikeforhisbirthdayintwomonthssoheletMichaelhavehisoldbike.Michaelwasoverjoyed喜出望外. 40MichaelvisitedWilliameverydayuntilWilliams'slegwasbetter. A.LuckilyWilliamwasnotseriouslyhurt. B.Michaelfounditinterestingandcouldn'thelplaughing. C.FromthenonMichaelandWilliambecamegoodfriends D.WilliamgavehisnewbiketoMichaeltoshowhisthanks. E.HoweverMichael'sdadhadlosthisjobanddidnothavemuchmoney. F.Astheboywasturningaroundacornerthebikecrashedintoatree. G.Afewminuteslateranambulance救护车cameandtookWilliamtothehospital. 36. 37. 38. 39. 40.
含氧有机物甲可用来制取多种有用的化工产品合成路线如下 已知ⅠRCHO ⅡRCOOHRCOOClRCOOR′RR′代表烃基 1甲的含氧官能团的名称是．写出检验该官能团常用的一种化学试剂的名称检验反应的条件为． 2写出己和丁的结构简式己丁． 3乙有多种同分异构体．属于甲酸酯含酚羟基且酚羟基与酯的结构在苯环邻位的同分异构体共有种． 4在NaOH溶液中发生水解反应时等物质的量的丁与辛消耗NaOH的物质的量之比为． 5庚与M合成高分子树脂的化学方程式为．
7.5分Howtomanageyouremailinbox36Weloveitandwehateit.Weneeditandwewantitbuttoooftenthepricewepayiscompleteemailoverload.Ascertainasthesunwillriseourinboxeswillbefullbymid﹣morning. Honestlywe'vedoneittoourselves.Wedependtoomuchonittocommunicateandasaresulthavemadeourselvespayattentiontoeveryoneofthem.Thisisterrible.37Everytimeanemailinterruptsyouitcoststimemoneyandbrainpower. Herearesomeofmybesttipstomanageemails 38Youcan'tgetintoworkifyoucheckemailseverytenminutes.Insteadyoushouldsetcertaintimestocheckyourinboxlikethetopofeveryhourorevery90minutes.Setatimeronyourphoneandsticktoit. Scanyourinbox.39Atthesametimedeleteeverythingthatisunnecessaryandanswertimelyrequestsfirst. 40Insteadofcreatinganemailtryspeakingwiththepersonyouwanttocommunicatewith.Oftenafive﹣minuteconversationonthelineismuchbetterthananemail. A.Emailisbecomingmoreandmoreimportantinourlives. B.Setaschedule. C.Emaiiisourfriendandtheenemy. D.Lookingthroughtheemailsquicklycansaveyourtime. E.Becauseemaiicaninterruptourworkandlife. F.Useaphone. G.Talktotheperson. 36. 37. 38. 39. 40.
prevent….From.
6分FiveyearsagoDavidSmithworeanexpensivesuittoworkeveryday.Iwasaclothesaddict迷hejokes.IusedtocarryafreshsuittoworkwithmesoIcouldchangeifmyclothesgotwrinkled皱的.TodayDavidwearscasualclothes﹣khakipantsandasportsshirt﹣totheoffice.Hehardlyeverwearsanecktie.I'mworkingharderthaneverDavidsaysandIneedtofeelcomfortable.Moreandmorecompaniesareallowingtheirofficeworkerstowearcasualclothestowork.IntheUnitedStatesthechangesfromformaltocasualofficewearhavebeenslow.Intheearly1990smanycompaniesallowedtheirworkerstowearcasualclothesonFridaybutonlyonFriday.Thisbecameknownasdress﹣downFridayorcasualFriday.Whatstartedoutasanextraone﹣day﹣a﹣weekbenefitforworkershasreallybecomeaneverydaythingsaidbusinessadviserMaislyJones. Whyhavesomanycompaniesstartedallowingtheirworkerstowearcasualclothes?Onereasonisthatitseasierforacompanytoattractnewworkersifithasacasualdresscode.Alotofyoungpeopledon'twanttodressupforworksaystheownerofasoftwarecompanysoit'shardtohirepeopleifyouhaveaconservativedresscode.Anotherreasonisthatpeopleseemhappierandmoreproductivewhentheyarewearingcomfortableclothes.InastudymadebyLeviStraussandCompany85percentofemployerssaidthatcasualdresshasapositiveeffectonwork.Supportersofcasualofficewearalsosaythatacasualdresscodehelpsthemsavemoney.Suitsareexpensiveifyouhavetowearoneeverydayonepersonsaid.Forthesameamountofmoneyyoucanbuyalotmorecasualclothes. 28.DavidSmithreferstohimselfashavingbeenaclothesaddictbecause. A.heoftenworekhakipantsandasportsshirt B.hecouldn'tstandacleanappearance C.hewantedhisclothestolooktidyandcleanallthetime D.hedidn'twanttospendmuchmoneyonclothes 29.Thereasonwhycompaniesallowtheirworkerstowearcasualclothesareasfollowsexceptthat. A.manyworkersdon'tlikeaconservativedresscode B.comfortableclothesmakeworkersmoreproductive C.acasualclothescodeiswelcomedbyyoungworkers D.alltheemployersintheU.S.areforcasualofficewear 30.Accordingtothispassagedress﹣downFridaymeansthat. A.onFridaycompanieswillgivetheirworkersanextrabenefit B.onFridaydress﹣downhasbecomeaneverydayphenomenon C.onFridaycompaniesallowtheirworkerstowearcasualclothesasafavor D.onFridaymanyworkerswanttowearcasualclothestoimpresspeople 31.Whichofthefollowingclothesiscasualwear? A.Khakipants. B.Suits. C.Neckties. D.Tuxedos.
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