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某化学兴趣小组为测定生铁样品中铁的质量分数，他们的实验过程和有关数据如图所示（生铁样品中的杂质不与稀硫酸反应）．请计算： （1）实验中生成气体的质量为 g． （2）生铁样品中铁的质量分数．...
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1分Icouldhavefinishedmyselfreflectionlastweekendbutthemathclassesandexercisesallmysparetime. A.takeup B.hadtakenup C.tookup D.hadbeentakingup
8分Anewstudyhasfoundthatrelaxationtechniquesdecreasetheneedforhealthcarevisitsandinterventions介入whichisagoodreasontopullouttheoldyogamat. Healthcarepractitionershaveknownforalongtimethatusingrelaxationtechniquescanimprovehealth.butit'ahardtogivesuchtreatmentswithoutscientificevidence.That'swhyresearchersattheMassachusettsGeneralHospitaldecidedtorunananalysisinwhichtheyanalyzedtherecordsof4.000patientsbetween2006and2014whofollowedtheirdoctors'recommendationsforrelaxationtechniquesandcomparedthemto13.0000otherpatientswhodidnotusethosesametechniques. Stress﹣relateddisordersarethethirdleadingcauseofhealthcarespendingintheUnitedStatesafterheartdiseaseandcancer.In2012thetreatmentofstress﹣relateddisorderssuchasheadachesbackpainandcostpaincostAmericansmorethan$80billion. Over90percentofpeoplesufferingfromstressorstress﹣relatedproblemsseekhelpthroughprimarycareandtendtobefrequenthealthcareusers.Thesevisitscanconsistofasmuchas70percentofphysicians'caseloads工作量. Teachingpatientshowtouserelaxationtechniquesisanexcellentwaytoreducephysicians'caseloadslessentheoverallburdenonthehealthcaresystemsavemoney.andprovidenon﹣internationalsolutionstophysicalproblemsthataresafeeffective. Ourresultsindicatethatmindbodyinterventionscanreduceindividualdiseaseburdenaswellastheutilizationofhealthcareresourcesandarewellsuitedtothechanginghealthcareenvironment.Mindbodyinterventionsareinexpensiverelativetothecostofanemergencyroomvisitahospitalizationorevenotheralternativemedicinetreatments. Soundslikeit'stimetoremovedustfromtheoldyogamatorsignupforthatclassyou'vebeenmeaningtotakeatthemeditationcenter.Youmightaswellstartnowratherthanwaitingtillyourpersonalhealthreachesacrisispoint. 1Whydidresearchersrunananalysisof1000patients? A.Tofindouthowrelaxationtechniquesworkour. B.Toprovidescientificevidenceaboutrelaxationtechniques. C.Toencouragemorepeopletomakeuseorelaxationtechniques. D.Toknowwhetherpeoplebelieverelaxationtechniquesareefficient. 2WhatcostspeoplethemoatintheUSA? A.Heartdisease. B.Backpain. C.Cancer. D.Headaches. 3Whatdoestheauthorthinkofrelaxationtechniques? ASimple B.Popular. C.Beneficial D.Complex. 4Whatdoesthesixthparagraphmainlytellus? A.Thechangeofhealthcareresources. B.Theadvantagesofmindbodyinterventions. C.Thevarietyofmindbodyinterventions D.Thecomparisonofmindbodyinterventionsandemergency.
15分你的美国朋友Chris目前在北京学习汉语他对中国传统文化非常感兴趣.本周五下午你校将要举办一个文化讲座请你根据以下提示给他写一封电子邮件邀请他来参加. 1.农业大学张教授讲解中国茶文化的历史和传播 2.讲座后有交流和品茶活动 3.你将陪同Chris并帮其翻译讲解. 注意1.词数不少于50. 2.可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. HiChris ﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣﹣ Yours Joe
10分 5WaytoGivetoCharity AcrossCanadacharitableorganizationsrelyonyourgenerositytogettheirworkdone.Trythesedifferentideastoideastohelpyourfavoritecauses. 1Weallhavethingsinourhomesthatwedon'tneedsuchasclothingtoys.Andfurniture.Ratherthanthrowingthemout.takethemtocharitableorganizationsandcharitystores.Sortthingsintocategorieskeepfixsellorgiveaway. Giveyourtimelocharity.2.In2010.wespenttwobillionhoursvolunteeringRai﹣SingmoneyandputtingoneventswerethemostcommonactivitiesfollowedbyservingonacommitteeorboardEvenifyoucanonlyspareafewhoursamonthmanyorganizationscoulduseyourhelp. Devoteyourdollars.Formanycharitiesthemosthelpfulgiftyoucangiveismoney.Contactyourfavouritecharitiesorvisittheirwebsitestodonate﹣everylittlebithelps3VisittheCanadaRevenueAgency'sCharitiesListingstolearnabouttheiractivitiesundfinances.TheCRAalsoprovidesinformationaboutcharitabletaxcreditsincludingacalculator. Helptoreducehungerpains.4FoodBanksCanadareportsthatabout850.000peoplegetassistancefromfoodbankseachmonthandmorethanathirdarechildrenandyouth Howcanyougetinvolved?Donatefoodormoney.volunteeratafoodhankorfundraise.Youcanalsosupportfoodrescueprogram. ShareyourskillsLikeotherkindsoforganizations.charitiesoftenneedspecificskillstosup﹣porttheirprojectandcampaigns5 A.Donatethingsyoudon'tneed. B.Needinformationaboutacharity? C.Considerusingwhatyouknow! D.Canadaofallagesaregenerouswiththeirtime. E.AcrossCanadapeopledon'thaveenoughtoeat F.Supposeyouarehungrywhatshouldyoudothen? G.Geryourwholefamilyinvolvedandclearthatunwantedthings!
30分 EachDayaMasterpiece IneverthoughtIwouldmovebackhomewithmyparentsaftermy1.ActuallyallthroughmysenioryearItoldmyselfthatmovingfromthe2bigcityofLosAngelesbackintomychildhoodbedroominthesleepysmallbeachtown3Igrewupwasoutofthequestion. ThusI4forscholarshiptotravelabroad.I5hoursintomyapplications﹣revisingessayscollectinglettersofrecommendationsresearchingprogramsandpracticing6.Imade7tothefinalroundsfortwofamouscompaniesbuteventuallywasnotchosenbyeither.WeeksaftergraduationI8mybelongingsintomyparents'smallcarandmovedbackhomefeelinglikea9failure. OnedayIsuddenly10apopularquoteMakeeachdayyourmasterpiece.IrealizedthatIdidn'thavetolive11onmyowninanexcitingnewcitytomakeeachdayamasterpiece. 12Ichangedmymindandbegantoseemytimeathomeasa13becauseIwasabletospendalotoftimewithmyparents.Ibegantowritefortwohourseveryday.Establishingawriting14helpedmemoreeasilychangeintothewritinggroove最佳状态.Somedaysthewordsflowed15.ButotherdaysIspentthebetterpartofmytwowritinghours16outofthewindowandtakingdownsome17ofmyideas.Eventuallymypagesofwritingbeganto18up.Iwrotearticlesessaysandshortstories.Ievenstartedanovel! Iwasnota19﹣Ineverhadbeen.Mysuccessdoesn't20onwhatotherpeoplethinkorwhatmypeers同辈aredoingorwhatIfeellikeIshouldbedoing.MylifeisasuccesswhenIammakingeachdaymyownmasterpiece. 1A.admission B.application C.graduation D.interview 2A.amusing B.exciting C.powerful D.challenging 3A.that B.which C.when D.where 4A.searched B.stood C.fought D.applied 5A.wasted B.poured C.cost D.spent 6A.assessments B.instructions C.interviews D.performances 7A.this B.them C.it D.that 8A.packed B.adjusted C.arranged D.classified 9A.constant B.complete C.complex D.competitive 10A.comearound B.comeinto C.comedown D.comeacross 11A.in B.out C.at D.around 12A.However B.Therefore C.Instead D.Furthermore 13A.surprise B.candy C.burden D.gift 14A.routine B.intention C.content D.talent 15A.rarely B.much C.smoothly D.regularly 16A.staring B.glaring C.turning D.coming 17A.poems B.rhyme C.stories D.notes 18A.wake B.break C.add D.set 19A.writer B.failure C.success D.novelist 20A.take B.fix C.count D.put
25分你的美国笔友Bob对钓鱼很有兴趣.请你根据以下要点写出你和你的爸爸暑假期间某天去钓鱼的经历通过电子邮件发给Bob让他分享你的经历.要点如下 1.所带器具和食物等 2.钓鱼过程 3.一天的收获和感受. 注意词数100左右 2.可适当增加细节以使行文连贯 3.开头语和结尾已为你写好不计人总词数. 参考词汇沙蚕clamworms鱼钩fishhook DearBob. Howareyou!I'mgladtowritethelettertoyou. Yours LiHua
1分Whatevertherelationshiptrytotoeachpersonallyourkindnessandunderstanding. A.appeal B.cater C.extend D.attach
30分 MyEmotional感人的ExperienceinJaipur IcametoIndiainFebruary2012tocompleteavolunteerpracticumrequirementwithsomefriends.Itwasreallyanunforgettableexperience! BeforewesetoffIthoughtitwouldbeahardjob1thatIcouldnotadapttothepoorlivingconditions.AfterarrivinginJaipurwewentstraighttothehotelthattheCenterhad2forusarelieftousasweweretiredfromthe3.Duringthefollowingdayswewere4tothecityandhadHindilessonswithourguideRavi. OnourfourthdayinJaipurweweretakentotheheadoffice.Therewewere5fortheChildDevelopmentProgramandoverthecoursewe6twostudiesrelatedtochildworkandchildrights.Wefocusedontheexperiencesofthechildrenwhowereworkingandthe7thatpushedthemintowork.TheexperiencewasentirelynewformeandIlearnedsomuchthroughthe8.Thebestpartoftheworkhoweverwas9beinginthecommunitiesandinteractingwiththechildrenandtheirparents.Iwas10toawayoflifecompletelydifferentfrommyown.InspiteofthepoorlivingsituationspeopleinJaipurwere11.Wefoundthattheparentscommunicatedopenlywitheachotherandtheywerealways12tosharetheirownthoughtsandfeelingswiththeirchildren.Icould13thatpeopleinJaipurhavepositiverelationshipswiththeirfamilyandcommunitymembers.Talkingwiththepeoplethereandhearingtheirstorieswassomethingthathadastrongeffectonmyworldviewcontinuingto14howIunderstandeverythingaroundmenow.Ihavebeen15bythepeoplethatImetthroughthisexperience. OntheweekendsIspenttimeinJaipur16thecityandshopping.Wewere17enoughtobethereduringHolianexcitingandcolorfulcelebrationinFebruaryendorearlyMarchinIndia!Wereally18everyminuteofthelifeinJaipur! GenerallymypracticumexperiencewithVolunteeringIndiawasextremely19.IknowthatIwillbethinkingabouteverythingthatIsawlearnedand20inIndiaandlookforwardtothedaythatIcanreturntothisamazingcountry. 1A.expecting B.worrying C.determining D.promising 2A.booked B.covered C.reported D.designed 3A.distance B.program C.movement D.journey 4A.limited B.arranged C.introduced D.pointed 5A.responsible B.available C.famous D.powerful 6A.described B.conducted C.exchanged D.benefited 7A.standards B.chances C.fears D.causes 8A.adventure B.memory C.process D.discovery 9A.really B.simply C.properly D.generally 10A.exposed B.selected C.compared D.delivered 11A.independent B.attractive C.comfortable D.cheerful 12A.careful B.willing C.upset D.ashamed 13A.predict B.advise C.sense D.wonder 14A.influence B.reflect C.analyze D.test 15A.reminded B.witnessed C.admitted D.inspired 16A.identifying B.exploring C.representing D.charging 17A.curious B.energetic C.lucky D.generous 18A.valued B.delayed C.confirmed D.permitted 19A.complex B.reasonable C.reliable D.positive 20A.declared B.imagined C.experienced D.promoted
1分Itsnowedheavilyallnightreallyannoyedeveryone. A.which B.that C.when D.where
1分﹣WhereareyougoingTed? ﹣ToJane'shome.ItoldherI. A.wouldvisit B.visit C.visited D.willvisit
某品牌智能滚筒洗衣机具有洗净度高不伤衣物可设定洗涤温度方便安全等优点．如图所示是其简化等效电路此时处于空档位置．闭合开关S旋钮绕P转动实现档位转换．旋至1档时R1R2同时工作洗衣机处于加热状态旋至2档时R2和电动机同时工作洗衣机处于保温洗涤状态．R1和R2均为电热丝其阻值不受温度影响．R1＝22Ω主要参数如下表．C水＝4.2×103J/kg•℃ 1洗衣机内注入10kg的水在额定电压下连续加热1050秒水温由20℃上升到50℃此过程中的加热效率是多少 2R2阻值是多少 3洗衣机处于保温洗涤状态时干路电流是多少
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