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我国家庭电路电压是 V，蒸汽熨斗接入电路熨烫衣物时，水蒸气液化会 热量，衣物内能增加主要是通过 的方式来实现的．
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我国家庭电路的电压是________V
我国家庭电路的电压为______V家庭电路中开关与其所控制的用电器是_______的选填串联或并联
电熨斗是家庭生活中常用的家用电器以下哪一项做法是错 误的
电熨斗不能与其它家用电器合用一个插座， 也不要与其它大功率电器同时使用
熨烫衣服间歇时， 要将电熨斗竖立放置或放在熨斗架上
熨烫衣物时， 临时有事离开一会儿， 不用拔掉电熨斗的电源插头
使用必须配备相应的蒸汽锅蒸汽管道真空泵等附属设备和设施投资运行费用大因此只适于大批量生产
调温电熨斗
蒸汽熨斗
滴液式蒸汽熨斗
蒸汽熨烫机
电熨斗是家庭生活中常用的家用电器以下哪一项做法是错误的
电熨斗不能与其它家用电器合用一个插座，也不要与其它大功率电器同时使用
熨烫衣服间歇时，要将电熨斗竖立放置或放在熨斗架上
熨烫衣物时，临时有事离开一会儿，不用拔掉电熨斗的电源插头
在电路中是提供电压的装置我国家庭电路的电压为V.对人体的安全电压为V.
我国家庭电路的电压为_________V对人体安全的电压为不高于_______V
电熨斗应选购调温型这种熨斗既升温快达到使用要求后又会自动断电熨烫衣物时在通电初始阶段先熨耐温较的待温
蒸汽熨斗具有温度均匀自动喷雾加温使用方便安全其熨烫温度不超过
100°
150°
180°
200°
我国家庭电路的供电电压是___________V一节干电池的电压是_________V.
在熨烫衣物的间歇应将电熨斗竖立放置或者放在
易燃的物品上
铁块上
专用的电熨斗架子上
砖石
下面几种熨烫设备中属于压制设备的是
抽湿烫台
主体整烫机
蒸汽烫模熨烫机
成品蒸汽熨斗
如图所示为一款有高低温两挡的蒸汽电熨斗电路原理图R1R2为电热丝其中R2＝242Ω工作时水升温并汽化
电压是使电路中________的原因提供电压的装置叫________空调工作时的电流是5______
蒸汽喷雾型电熨斗最大的优点就在于它代替了人工的作用并可使在熨烫较厚的衣料或熨烫需要较大湿度的衣物时能
喷水
喷蒸汽
喷药水
喷防腐剂
额定功率是1000W.的蒸汽电熨斗在预热后熨烫衣物时基本上按照加热10s停5s的程序工作如果熨一件衣
6×10
5
J
10
4
J
2×10
5
J
4×10
5
J.
遇热不会出现极光现象因此蒸汽熨斗可直接放 在衣物上硬烫
棉麻衣物
毛织品
丝绸衣物
化纤衣物
关于家庭电路下列说法不正确的:
我国家庭电路的电压是220V;
家庭电路中的用电器都是并联的;
用湿手拨动电路中的开关是不安全的;
为了方便，可以直接在家庭电路的电线上晾衣物。
我国家庭电路电压为________V
一节新干电池电压为____________V;我国家庭电路电压____________V.
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分类法是学习和研究物质的一种重要方法下列分类正确的是
下列图示的化学实验基本操作中正确的是
某化学学习小组的同学在学习了常见的酸以后对蚊虫分泌的让人痛痒不止的蚁酸产生了兴趣．他们在老师指导下对蚁酸进行探究． 【查阅资料】蚁酸的主要成分是甲酸甲酸的化学式为HCOOH甲酸溶于水在一定条件下发生分解反应生成两种氧化物． 【提出问题】甲酸溶液是否具有酸性 【实验与结论】向盛有甲酸溶液的试管中滴加紫色石蕊溶液观察到溶液颜色变成红色说明甲酸溶液显性． 【提出问题】甲酸分解生成的两种氧化物是什么 【推断与猜想】 1小组同学根据甲酸中含有氢元素推测出生成物中含有水． 2他们对另一种氧化物提出两种猜想 猜想①二氧化碳猜想②一氧化碳． 【实验与结论】 为了证明自己的猜想他们将甲酸分解产生的气体通过如图所示的装置铁架台已略去．观察到的实验现象如下 Ⅰ．装置A中澄清石灰水无明显变化． Ⅱ．装置C中的黑色粉末变红色． Ⅲ．装置D中澄清石灰水变浑浊． 【实验结论】甲酸具有酸性在一定条件下分解生成水和． 【拓展延伸】人被蚊虫叮咬后在其叮咬处涂抹可减轻痛痒．
10分Unlessyouthinkyou'rethesmartestwhodoesn'twanttobesmarter?OfcourseIwanttobesmartertoo.SoItrytofindoutwho'stherealsmartguythatmaybeIcanlearnfrom.36 ▲Theyprobablydosocialmedia.Notalwaysbutprobably.37Theyalsousethistoensuretheycanfeedtheirbrainswiththingstheyotherwisewouldn'thavecomeacross. ▲38Theyneverbothertheirheadabouttheproblemofwork﹣lifebalanceandsomehowmanagetoseem100%engagedinwhatthey'redoingonallfrontssimultaneously同时eventhoughyouknowthey'retakingappropriatestepsbehindthescenestomakesuretheirlivesarewellbalanced. ▲Theyknowtheyarethesmartestintheroombuttheydon'tspendmuchtimetalkingaboutthat.39Thatistheychallengethemselvestomakeeveryoneelseintheroomthesmartestpersontoo. ▲Theynevereverunderanycircumstancesmakeyoulookstupideventhoughitwouldbeeasytodoso.They'velearntthroughbitterexperiencethattheonlythingthathappenswhenyoumakesomeonelookbadisthatyoulookbadyourself. ▲Iftheyaremanagerstheywillmakeeveryefforttogetpeoplemoreconnectedandmorepopularthanthemintheirteams.40They'renotthreatenedbecausetheyknowthatsmartnessissynergistic相互促进的. A.It'snotonlyachancetolisten. B.Theyknowitisanadvantagetothem. C.Theytakeitasapersonalchallengeinstead. D.Theywillbesmilingevenwhenthingsgowrong. E.NowI'vegotanansweraboutwhethersomeone'ssmart. F.Theyalsoensuretheirsmartpeoplelooksmarterthanthem. G.Theydealwithhomeworkandpersonalinterestsperfectly.
8分Itisbelievedthatthesuccessofhumansasaspeciesdependstoalargeextentonourabilitytocooperateingroups.Muchmoresothananyotheranimalpeopleareabletocoordinateandjointheirforcesandactionstoproducemutual共同的benefits. NewresearchinvolvingDrLucasMollemananexpertattheUniversityofNottinghamsuggeststhatsuccessfulcooperationingroupsdependsonhowpeoplegatherinformationabouttheirpeersandhowtheybasetheircooperativedecisionsonit. Biologistswonderhowcooperationcouldhavedevelopedbynaturalselection:Itispuzzlinghowcooperationcanbebeneficialwhenitispossibletobehaveselfishlyandtakeadvantageofthecooperativeeffortsofyourgroup.Psychologistsandeconomiststryhardtounderstandwhymanypeoplearewillingtosacrificetheirownwelfaretobenefittheirsocialenvironment. DrMollemanfromthecenterforDecisionResearchandExperimentalEconomicssaidThequestionthatourresearchtriestoansweris:‘Howdopeoplemakedecisionswhentheiractionscanaffectthewelfareofothers?'Morespecificallywewanttoknowhowpeopledeterminetheirbehaviorwhentheyhavetocooperateingroups.Inthesesituationsabeneficialoutcomeforthewholegroupcanbeachievedifeveryonecooperates.Individuallyhoweverpeoplemightbebetteroffbymakingselfishchoices.Itispossiblethatpeoplepaycloseattentiontotheirfellowgroupmateswhentheymakedecisions.Forinstancetheycooperateifothersalsocooperatebutactselfishlywhenothersdonotcooperate. DrPieterVanDenBergfromtheUniversityofGroningensaidFrompreviousresearchweknowthatsomepeopleare‘majority﹣oriented以多数人为方向的'andtendtolookatthebehaviorofthemajorityintheirgroupwhereasothersare‘success﹣oriented'andtrytofindoutwhatkindofbehaviorpaysoffbestforthemselves. DrMollemansaidItturnsoutthatbehavioringroupsofsuccess﹣orientedpeoplewasmuchmoreselfishthanitingroupsofmajority﹣orientedpeople.Asaconsequencethepeopleinthemajority﹣orientedgroupstendedtoearnmoremoneyintheexperimentsincetheycooperatedmore. 28.Accordingtothepassagewhatisspecialabouthumanbeing? A.Theyarelikelytocommunicatewellwithothers. B.Theyarecapableofworkingtogetherwithothers. C.Theyarestrongtosurvivesomenaturaldisasters. D.Theyareeasytogetaccesstovariousinformation. 29.Whatdoestheunderlinedworditinparagraph2referto? A.Research. B.Cooperation. C.Information. D.Group. 30.TheauthorwritesParagraph4to. A.letusknowhowpeoplemakecooperativedecisions B.showustheimportanceofcooperativedecisions C.tellushowtomakeotherpeoplecooperateinagroup D.remindusoftheadvantagesofcooperatingwitheachother 31.Fromthepassagewecaninferthat. A.peoplearemoreconcernedaboutwhichgrouptheyaresupposedtoselect B.theeffortsofsuccess﹣orientedpeoplearemorelikelytopayoff C.peoplemakeawisedecisionbasedonobservingothers'behaviorscarefully D.peopleperformdifferentlywhentheymakedecisions.
豆腐是人们喜爱的食物营养丰富能为人体提供所需的多种氨基酸其中含量最多的是亮氨酸化学式为C6H13NO2．下列关于亮氨酸的说法不正确的是
下列实验基本操作正确的是
6分Herearethebesttravelsiteswe'vefoundtohelpyougetthebestbargainsonairfares. 1Kayak.comscours搜索hundredsofonlinesourcesforthecheapestfare.Themoreflexibleyouareontimethebetteryouhavethechancesoffindingagreatbargain.Searchfordatesuptothreedaysbeforeoronanyweekendsinthenextyear.Andwiththesite'sexploretoolyoucanscanaworldmapforalltheplacesyoucanreachwithinaspecifiedper﹣ticketpricerange. Kayakcanalsoforecastwhetherfareswillgoupordownwithitspricepredictor.Enteryourdesiredtravelplanandthesitewillreturnalistofflightoptionsalongwitharecommendationtoeitherbuynoworwaitforafaredrop. 2AirfareWatchdogworksbestfortravelersreadytotakeoffatthedropofadeal.ThesitehasactualpeoplehidingonairlineWebsitesexpectingfaresales.TheysignupforrewardsprogramstogetpromotionalcodesanddiscountoffersthatcanbepassedontoAirfareWatchdogusers.AlsoinNovember2014thesiteaddedanewserviceHotelwatchdogwhichfetcheshotellistingsthatoffergreatvaluesmeaningtheyhavepriceslowerthansimilarnearbyhotels. 3WhichBudget.comwillhelpyoubuildaninexpensiveoverseasflightplanbyusinglocalbudgetairlines﹣﹣﹣agreatwaytosaveoninternationaltravel.Selectyouroverseasstartingpointendpointorbothandthesitewilllistairlinesyou'veprobablyneverheardof.ForexampleifyousearchforflightsfromBangkoktoBeijingyou'llgetoptionsfromChinaEasternandHainanAirlines. 21.HowcanyougetthebestbargainbyusingKayak.com? A.Getthepromotionalcodesanddiscountoffers. B.Leaveplentyoftimetobookyourticket. C.Buyaround﹣tripticket. D.Selectyourstartingpointandendpointinadvance. 22.WhichofthefollowingisthenewserviceprovidedbyAirfareWatchdog? A.Alistofhotelswiththelowestprice B.Promotionalcodesanddiscountoffers. C.Alistoflocalbudgetairlinesforforeigntravelers. D.Adviceonbuyingtheticketnoworwaitforadrop. 23.Thepassageiswrittenfor. A.peoplewhowanttoknowwheretotravel B.peoplewhodon'thavepromotionalcodes C.peoplewhoplantobuyairplanetickets D.peoplewhoworkinanairlinecompany.
8分Ithasbeenseenasahi﹣techbike﹣sharingboomthatentrepreneurshopewillmakethemrichwhiletransformingChina'straffic﹣jammedcities. Butoccasionallydreamscanturnlesspleasant.InthesouthernChinesecityofShenzhenmorethan500bicyclesforhirehavebeenfounddumpedinhugepilesonthestreetsaccordingtoreports.Picturesshowedvehiclesnearlythreemetreshighwithsmallpartsontheground.Citystreetsaroundthecountryhaveseenanexplosionofthecolourfulbikesthatuserscanrentondemandwithasmartphoneappandthenparkwherevertheychoose. ThesharingeconomyistakingoffinChinawhereride﹣sharingandAirbnbareincreasinglycommonplace.FromShanghaitoSichuanprovincebike﹣sharingarebeingstartedinanefforttoreducetrafficjamandairpollutionbyputtingacountryonceknownastheKingdomofBicyclesbackontwowheels. CompaniessuchasOfoandMobikewiththeiryellowandorangebikeshavebeeninacut﹣throatbattleforcustomers.Butproblemshavearisenwhenclientshaveabandonedtheircycles.SomepeoplethesedaysjusthavereallybadcharacteramannamedHewholivesnearwherethepilesappearedtoldtheSouthernMetropolisDaily.Whenthey'redoneusingthebiketheyjustthrowitawaysomewherebecausethey'vealreadypaid.Residentstoldthepaperthatbikeshadbeenpilingupoverthepastweekeitherparkedrandomlybycarelessusersorpiledbylocalsecurityguardstryingtoclearnarrowresidentialalleysandfootpaths. ZhuangChuangyuarepresentativeatShenzhen'smunicipalpeople'scongresssaidthecityneededtostepupregulationofthebike﹣sharingindustryinordertoimprovetrafficconditionsandsafetystandardsespeciallysinceschoolchildrenoftenusedthebikes. In1980almost63%ofcommuterscycledtoworktheBeijingMorningPostreportedin2015citinggovernmentdata.Butby2000thatnumberhaddecreasedto38%andtodayitstandsatlessthan12%.Carusemeanwhilehasrocketed.In2010ChinaovertooktheUStobecometheworld'slargestcarmarketwith13.5mvehiclessoldinjust12months. 24.Whycanwesaybike﹣sharinginChinaisaboom? A.Becauseentrepreneurswillbecomerichbecauseofit. B.BecauseitwilltransformChina'straffic﹣jammedcities. C.Becausevehiclesarenearlythreemetreshigh. D.Becausecitystreetshaveseenanincreaseofit. 25.Whatismentionedaboutthesharingeconomy? A.Itreferstosmartphonesandapps. B.Airbnbhasbeenacommonthing. C.Chinahastakenastepinit. D.ItiswidespreadacrossChina. 26.WhatdoweknowaboutOfoandMobike? A.Theyareyellowandorangebikes. B.Theyareincompetitionwitheachother. C.Theycausetheclientstoabandontheircycles. D.Theyhavereallybadcharacter. 27.Whichofthefollowingmaytheauthoragreewith? A.Carelessusersandlocalguardsaretoblameforthepilingbikes. B.Regulationsshouldbestrictforschoolchildren. C.Manyuserslackproperbehaviorinusingthebikes. D.ChinaovertooktheUSbecomingbackontwowheels.
15分Itmaybecommonknowledgethat61BritishpeoplecallfootballisknownassoccerintheUSandcolourinBritishEnglishgoes62theuinAmericanEnglish.Butaccordingtoaninfographic图表63makerecentlybywebsiteGrammarCheckthesearefarfrombeingtheonly64differentbetweenthetwocountries'useofEnglish. Theinfographicoutlined63ofthemaincontrastsbetweenBritishandAmericanEnglishfromthe65muchwell﹣knownlift/elevatorandautumn/falltothelesswell﹣knowngarden/yardandpetrol/gasoline. Someofthevocabularymismatchesare66differentthattwopeopleinaconversationmayfailtomake67theyunderstood.Forexamplethetwocountrieshavedifferentnamesforcertainfood.BiscuitsandsweetsinBritain68knowascookiesandcandyrespectivelyintheUS. Butwhile69getfoodnamesmixeduponlycausesconfusionsomemisunderstandingsmayevenleadto70embarrassifyou'renotcareful.IfaBritishmanintheUSisaskedtoshowuptoapartyinpantsthere'sachancethathemightgetalotofstaresfromotherguests.
3分元素周期表是学习和研究化学的重要工具可以从表中获得许多知识．图A见下表是元素周期表的一部分图B和图C是元素周期表中两种元素的原子结构示意图．请你根据图表回答下列问题1从图A中找出原子序数为16的元素名称为2图C是某元素的原子结构示意图该原子在化学反应中易电子3图B是某元素的原子结构示意图该元素在图A中的位置是选填①②或③．
30分IrecentlyattendedaspecialservicecalledNightofKindness.ThisnightwasaboutaprojectcalledKindnessWaterwhichwas41byPhillipWagner. Onedayhewasreadingthenewspaperand42astoryaboutAfricaandwas43tolearnthatlimitedaccesstocleandrinkingwaterkills3.6millionpeopleperyear.Heknewhehadtohelp.He44donationsfromfriendsfamilyandchurchestohelpdigawellinaMalawaivillagethencreatedabottledwatercompanythatdonates100%ofthe45tobuildingmorewells.WithinayearsalesofKindnesswatersupportedtwoprojectsinUganda.SincethenKindnessWaterhas46550wellsin19countrieshelpingmorethan325000people.Whatan47! Buthereiswhatreally48me:ItallstartedwithonemanPhillipWagnerandhisdesiretomakeadifference.Hesawaneedand49withIhavetohelp.Thousandsofotherswhoreadthesame50thatmorningmighthavealsobeensurprisedand51affecteddeeplywhentheylearnedthefact.Butallthosepeopledidn't52.TheythoughtOhwell.That'stoobad.53somebodywillhelpthosepeoplewhodon'thaveanycleanwater. PhillipWagnerdecidedtobethatsomebodyand54thehelpofthousandsofotherswhohavejoinedheismakingadifferencetotheworld.Yousee55changestartswithordinarypeopledoingtheirpart.Iwanttobeoneofthose56makers. AsavideoofchildrensmilingandswimmingincleanwaterrolledinthebackgroundPhillipWagnersaidIjustwantyoutoknowthatI57myalldidmybestbroughthappinesstosomeoneand58thisworldalittlebetterjustbecauseIwashere. Let'sliveoutthosewordstoday.59youchoosetovolunteerathomelesssheltersor60anyothergooddeedsforthoseinneedlet'sbedifferencemakers.Let'sleavethisworldalittlebetter. 41.A.founded B.scheduled C.hosted D.attended 42.A.figureout B.commentedon C.madeup D.cameacross 43.A.willing B.shocked C.guilty D.lucky 44.A.matched B.appreciated C.gathered D.applied 45.A.resources B.profits C.products D.taxes 46.A.filled B.rented C.built D.bought 47.A.breakthrough B.consequence C.advantage D.influence 48.A.changed B.touched C.frightened D.excited 49.A.responded B.shared C.played D.connected 50.A.book B.magazine C.article D.picture 51.A.ever B.often C.never D.even 52.A.act B.ignore C.beg D.participate 53.A.Personally B.Sincerely C.Fortunately D.Hopefully 54.A.under B.from C.with D.by 55.A.real B.hard C.little D.creative 56.A.decision B.dream C.water D.difference 57.A.showed B.gave C.lost D.threw 58.A.left B.guided C.promised D.kept 59.A.If B.Whether C.Since D.Before 60.A.record B.remember C.perform D.know
从分子的角度解释下列事实其中错误的是
10分Areyousickofgoingtobedlateandwakinguptired?36Anewstudysuggeststhatacoupledaysofcampinginthegreatoutdoorscanresetyourcircadianclockandhelpyougetmoresleep. Thecircadianclockmorecommonlyknownasthebodyclockisaninternalsystemthattellsourbodieswhenit'stimetogotosleepandwhenit'stimetowakeup.37 Inahealthysleepermelatoninlevelsriseafewhoursbeforebedtimestayhighthroughthenightandthensettlebackdownwhenit'stimetowakeup. Inourmodernsocietyhowevermostofusstayupmanyhourspastsunsetandwouldprobablysleepinmanyhoursaftersunriseifwecould.38Itmayalsohaveotherhealthconsequencesaswellsuchasdiabetesoverweightandheartdisease. ProfessorKennethWrightoftheUniversityofColoradointheUSwantedtoseeifourbodyclockscanberesetbyashortstayinnature.39Ninewentonaweekendcampingtripwhiletheotherfivestayedhome. Attheendoftheweekendtheresearchersreportedthatinjusttwodaysthecampers'bodyclockshadshiftedsothattheirmelatoninlevelsbegantorisemorethananhourearlierthantheydidbeforetheyleftonthetrip.40 A.Hepreparedalotfortheresearchandaskedmanyfriendstohelphim. B.Bycontrastthebodyclocksofthegroupthatstayedhomeshiftedevenlateroverthecourseoftheweekend. C.Scientiststrackthisclockbymeasuringtheamountofmelatonin褪黑激素circulatinginaperson'sbloodatanygiventime. D.Nowyouhaveagoodsolution. E.Histeamrecruited14physicallyactivevolunteersintheir20sand30s. F.Thengrabyourhikingbootsandatent. G.Andthetroubleisyourmelatoninlevelsmaystillbehighwhenyouralarmclockgoesoffinthemorningwhichleadstogrogginess.
化学用语是学习化学的主要工具按要求用化学用语填空1钙元素22个氮原子3过氧化氢分解产生氧气．
归纳总结和逻辑推理是化学学习中常用的思维方法．以下说法正确的是
下表中有关量的变化图象与其对应叙述相符的是
为探究CuO和稀硫酸反应后溶液中溶质的成分同学们设计了实验步骤如下 1取少量CuO粉末于试管中滴加稀硫酸粉末全部溶解得到溶液A． 2向步骤1的试管中滴加BaCl2溶液有白色沉淀生成．得出结论A中溶质只有CuSO4．有同学认为该结论不合理继续进行实验． 3向步骤2的试管中滴加NaOH溶液产生沉淀质量随加入NaOH溶液质量的変化关系如图．回答下列问题 ①A中的溶质有填化学式b～c之间的沉淀是． ②c点对应溶液中溶质的可能组成有填化学式． ③由以上实验总结出在分析化学反应后溶液中溶质的成分时除了考虑生成物外还需要考虑．
下列化肥中属于复合肥的是
25分假定你是学生会__李华.由于天气原因你们学校原定于周二举行的参观博物馆的活动有所调整请口头通知同学们相关事宜. 1.周二看电影 2.周四参观博物馆 3.电影名称观影时间地点等. 注意:1.词数100左右; 2.可以适当增加细节已使行文连贯. .
15分Therewasagardenerwholookedafterhisgardenwithgreatcare.Towaterhisflowersheusedtwobuckets.Onewasashinyandnewbucket.Theotherwasaveryoldandworn﹣outone61hadseenmanyyearsofservicebutwasnowpastitsbest. Everymorningthegardenerwouldfillupthetwobuckets.Thenhewouldcarrythemalongthepathoneon62sidetotheflowerbeds.Thenewbucketwasveryproudofitself.Itcouldcarryafullbucketofwater63asingledropspilled.Theoldbucketfeltvery64shamebecauseofitsholes:beforeitreachedtheflowerbedsmuchwater65escapefromtheholes. SometimesthenewbucketwouldsaySeehowcapableIam!Howgooditisthatthegardenerhasmetowatertheflowerseveryday!Idon'tknow66hestillbotherswithyou.Whatawasteofspaceyouare! AndallthattheoldbucketcouldsaywasIknowI'mnotveryusefulbutIcanonlydomybest.I'mhappythatthegardenerstillfindsalittlebitofuseinmeatleast. Onedaythegardenerheardthatkindofconversation.After67watertheflowersasusualhesaidYoubothhavedoneyourworkverywell.NowIamgoingtocarryyouback.Iwantyoutolook68carefulalongthepath. Thenthetwobucketsdidso.Allalongthepaththeynoticedonthesidewherethenewbucket69carrytherewasjustbareearth;ontheothersidewheretheoldbucketpassedtherewasa70joyrowofwildflowersleadingallthewaytothegarden.
成语是中华民族文明与智慧的结晶．下列成语所描述的变化属于化学变化的是
厉害了我的国！厉害了复兴号！复兴号动车组列车如图是由中国铁路总公司牵头组织研制具有完全自主知识产权达到世界先进水平的动车组列车． 1列车利用碳滑板与接触网接触来获取电．碳滑板通常用石墨制成是因为石墨具有性石墨在常温下受日光照射或与空气水分接触都不容易起变化说明其化学性质． 2制造列车的材料有铝合金不锈钢高强度钢高分子材料等．不锈钢铝合金属于选填“金属材料”或“合成材料”铝合金的硬度比纯铝的硬度在空气中铝制品耐腐蚀的原因是． 3列车轨道建设中常用铝和氧化铁化学式为Fe2O3在高温条件下发生反应生成熔融状态下的铁单质对钢轨中的缝隙进行焊接．其反应的化学方程式为Fe2O3+2AlX+2Fe则X的化学式为该反应属于选填“置换”或“复分解”反应．
8分There'samistake.‘Moonlight'youguyswonbestpicture.AndwiththosewordsproducerJordanHorowitzofLaLaLandtoldthecastandcrewofacompetingfilmthatithadwontheOscars'biggestaward.PresentersWarrenBeattyandFayeDunawayweregiventhewrongcategory'senvelopebeforetheywentonstage.BeattywasclearlyconfusedaboutwhathesawwhenheopenedtheenvelopebutDunawayreadthenameofthefilmlistedbelowStone'sname.TheactorsandproducersfromLaLaLandlefttheirseatsandfilledthestagetoaccepttheirOscarstatues.TheygavemanyspeechesbeforeHorowitzinterrupted.Thisisnotajoke.Moonlighthaswonbestpicturehesaid.HetookthecardfromBeattyandhelditupforthecameras.Moonlight.BestPicturehesaidasthecameramovedcloser.Theshow'shostJimmyKimmelmadethebestofthesituation.HewentuptoBeattyandexclaimedWarren.Whatdidyoudo?KimmelalsosaidPersonallyIblameSteveHarvey.ThatwasinreferencetothemistakeHarveymadein2015attheMissUniversepageant.HeannouncedthewrongwinnerfirstsayingitwasthecontestantfromColombiaandthenrealizingthecorrectwinnerwasactuallyfromthePhilippines.OnceorderhadbeenrestoredBeattytriedtoexplainwhathappenedsayinghehadbeengiventhewrongenvelope.BarryJenkinsisthewriteranddirectorofMoonlight.Oncehereachedthestagehesaideveninmydreamsthiscannotbetrue.StonehappytohavewonthebestactressawardlatersaidisthatthecraziestOscarmomentofalltime?Cool!Manypeoplearewonderinghowthemistakewasmade.TheaccountingfirmPricewaterhouseCoopershasbeenhandlingOscarvotesforover80yearswithoutanyproblems.Thefirmapologizedtoallofthepeoplewhoweremadeuncomfortablebythemistake.Itpromisedtoinvestigatewhatcausedtheerror.Horowitzisbeingcreditedforstayingcalmandstoppingtheshowtocorrecttheerror.Peoplearecallinghimgraciousagreatproducerandclassy.EvenJenkinssaidmuchrespecttothatdude.32.WhatcanweknowfromthewordsofHorowitz?A.LaLaLandwonthebestpicture.B.BeattyandDunawaymadeamistake.C.TheOscars'biggestawardbelongstoMoonlight.D.Horowitzwasgiventhewrongenvelope.33.HowdidJimmyKimmeldealwiththesituation?A.Hewasconfusedandopenedtheenvelope.B.Hesavedtheembarrassingoccasion.C.Hemadefunofthesituation.D.HepointedoutWarren'smistake.34.Itcanbeinferredfromthetext.A.Beattymadethemistake.B.BarryJenkinssuspectedtheresult.C.ThefaultisduetoPricewaterhouseCoopers.D.Horowitzisbeingrespectedforhisreaction.35.Thebesttitleofthetextshouldbe.A.Whomadethemistake?B.TheOscars'biggestaward.C.Amix﹣upintheAcademyAward.D.Pricewaterhousetakestheresponsibility.
化学是你化学是我化学深入我们的生活．下列做法不正确的是
10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:在错的词下面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. WuYishuwhostudyataHighSchoolinShanghaicameoutontopintheChinesePoetryCompetition.InanearlierpartWushockedtheaudiencewhenperformedinasectionentitledFeihualing.Thegame'sthemewasyuemeaningmoonormonthinChinese.SherecitedlinestheClassicofPoetry诗经theearlycollectionofpoemsinChina:InJulythecricketsareinthefield;InAugusttheyareontheyard;InSeptembertheyareatthedoor;InOctoberthecricketsenterandcrawlunderourbeds.七月在野八月在宇九月在户十月蟋蟀入我床下. IrealadmireherknowledgeofpoemssaidHuangZijin16asenior2studentfromNingboHighSchoolintheZhejiangprovince.ThefirsttimeIsawherwearingtraditionHanclothingonTVIwasveryimpressedbyhisclassicallooks.ShefulfillsallmyfantasiesforclassicChinesewomen'stalents.What'smoreshealwaysappearssocalmthroughouttheshowthatisveryunusualforherage.
25分假定你是李华最近你在当地报纸上看到一则游泳培训班的广告称其有称职教练instructor一周包会.你会一点游泳但水性不太好想在暑假参加训练.请你写一封咨询信了解相关情况要点如下: 1.训练的具体时间和地点. 2.条件和费用. 3.其他特别注意的事项. 注意:1.词数100词左右. 可以适当增加细节以使行文连贯; DearSir/Madam Sincerelyyours LiHua.
用化学用语回答 1氧元素 2高锰酸钾 3铝离子 4标出氧化铁中铁元素的化合价．
下列有关叙述正确的是
根据如图回答问题 1实验室用高锰酸钾制取并收集较纯净的氧气应选用的装置是填字母．向气体发生装置内加入药品前应进行的操作是． 2实验室用石灰石和稀盐酸反应制取二氧化碳时可选用发生装置A或GG与A相比较其优点是若用F装置收集二氧化碳检验二氧化碳已收集满的方法是．如果要证明制取二氧化碳实验后的废液呈酸性可选用的试剂是填字母． a．紫色石蕊溶液b．石灰石c．氢氧化钠溶液d．硝酸银溶液e．铜
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