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某工业废水中含有大量Na+、Mg2+、Fe2+、H+，废水中可能大量存在的阴离子是（ ）
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高三上学期化学《》真题及答案
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某河道两旁有甲乙两厂它们排放的工业废水中含有K+Ag+Fe3+Cl-OH-NO3-六种离子1甲厂的废
以下关于污水的说法正确的是
分流制城市污水包括生活污水、工业废水和降水
生产废水是指污染严重的废水
生活污水中含有大量的病原微生物
雨水是不经治理即可收集的可靠水源
学习小组测定某工业废水含有H2SO4HNO3不含固体杂质中H2SO4的含量取100g废水于烧杯中加入
某工厂的工业废水中含有大量的FeSO4较多的Cu2+和少量的Na+为了减少污染并变废为宝工厂计划从该
某工厂的工业废水中含有大量的FeSO4较多的Cu2+和少量的Na+.为了减少污染并变废为宝工厂计划从
生活污水和某些工业废水中含有大量有机物成为严重缺氧状态排入天然水体后就会消耗大量溶解氧使水体遭受严重
某工厂排放的工业废水中可能含有K+H+Mg2+S.Cl-N.等离子经检测废水呈明显的碱性则可确定该厂
H
+
、K
+
、N
K
+
、N.、S.
H
+
、Mg
2+
K
+
、Mg
2+
、S.、Cl
-
某探究小组同学对某工业废水含有H2SO4HNO3中H2SO4的含量进行测定.取50g废水于烧杯中加入
学习小组测定某工业废水含有H2SO4HNO3不含固体杂质中H2SO4的含量取100g废水于烧杯中加入
某河道两旁有甲乙两厂它们排放的工业废水中含有K+Ag+Fe3+Cl-OH-NO3-六种杂质离子甲厂的
某河道两旁有甲乙两工厂它们排放的工业废水中含有CuSO4NaOHBaNO32Na2SO4MgNO32
工业废水中的生产废水是指
生产中排出的污染较轻的工业废水
生产中排出的污染较严重的工业废水
工业生产中只含有有机污染物的工业废水
工业生产中不含有有机污染物的工业废水
某化工厂有甲乙两个车间它们排放的工业废水澄清透明共含有K.+Cu2+OH﹣NO﹣3四种离子.1甲车间
.某工厂的工业废水中含有大量的FeSO4较多的Cu2+和少量的Na+为了减少污染并变废为宝工厂计划从
工业废水中的生产废水是指
生产中排出的污染较轻的工业废水
生产中排出的污染较严重的工业废水
工业生产中只含有有机污染物的工业废水
工业生产中不含有机污染物的工业废水
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工厂的工业废水不可直接往江河湖海中排放否则会造成严重公害某河道两旁有甲乙两厂它们排出的工业废水各含有
某厂的酸性工业废水中含有一定量的Fe3＋Cu2＋Au3＋等离子有人设计了图中的工艺流程利用常用的酸碱
有一个工厂的工业废水中含有大量的比重接近于1的悬浮物试选择几种合适的处理方法为什么
某工厂排放的工业废水中可能含有K+H+Mg2+SO42-Cl-NO3-等离子经检测废水呈明显的碱性则
H
+
、K
+
、NO
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K
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、NO
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、SO
4
2-
H
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、Mg
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K
+
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、SO
4
2-
、Cl
-
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下列化学用语不正确的是
NaOH溶液滴定邻苯二甲酸氢钾邻苯二甲酸H2A的Ka1＝1.1×10﹣3Ka2＝3.9×10﹣6溶液混合溶液的相对导电能力变化曲线如图所示其中b点为反应终点．下列叙述错误的是
InBritainandothercountriesyoungpeoplesometimestakeagapyearayearoffbetweenhighschoolandcollegeThisideanevergainedabigfollowinginAmericaRecentnewsreportshavesuggestedthatinterestmaybegrowingthoughtherearenoofficialnumbers. CharlesDeaconDeanofAdmissionsatGeorgetownUniversityinWashingtonD.C.estimatesthatinthecurrentfirst﹣yearclassof1600studentsonlyabout25decidedtotakeayearoff.Hesaysthisnumberhasnotchangedmuchovertheyears. Mr.Deaconsaysthemostcommonreasonfortakingagapyearistohaveachancetotravelbuthesaysinternationalstudentsmaytakeagapyeartomeetrequirementsathomeformilitaryduty. Somehighschoolgraduatesseeayearoffasachancetorecoveraftertwelveyearsofrequirededucationbutitcanalsogivestudentsachancetoexploretheirinterests.Studentshopingtobedoctorsforexamplecouldlearnabouttheprofessionbyvolunteeringinahospital. Manycollegesanduniversitiessupportgap﹣yearprojectsbypermittingstudentstodelaytheiradmission.Expertssaystudentscangrowemotionallyandintellectuallyastheyworkatsomethingtheyenjoy. TheHarvardadmissionsofficehasanessayonitswebsitecalledTimeOutorBurnOutfortheNextGeneration.Itpraisestheideaoftakingtimeoff.tostepbackthinkandenjoygaininglifeexperiencesoutsidethepressureofstudies.ItalsonotesthatstudentsaresometimesadmittedtoHarvardorothercollegespartlybecausetheydidsomethingunusualwiththattime. OfcourseagapyearisnotforeveryoneStudentsmightmisstheirfriendswhogoondirectlytocollege.Andparentsmightworrythattheirchildrenwilldecidenottogotocollegeoncetheytaketimeoff.Anotherconcernismoney.Ayearoffawayfromhomecanbecostly. HollyBull'sjobistospecializeinhelpingstudentsplantheirgapyear¨.Shenotesthatseveralbookshavebeenwrittenaboutthissubject.ShesaysthesebooksalongwithmediaattentionandtheavailabilityofinformationontheInternethaveincreasedinterestintheideaofayearoffandshepointsoutthatmanygap﹣yearprogramscostfarlessthanayearofcollege. 1Whatisthepassagemainlyabout? A.MoreandmoreAmericanstudentsarechoosingtotakeayearoff. B.IfyouwanttogotoanAmericanuniversitytakeagapyearfirst. C.ItislikelythattakingagapyearisbecomingpopularinAmerica D.Americansholddifferentopinionstowardsstudents'takingagapyear. 2Howmanyreasonsforstudents'takingagapyeararementionedinthepassage? A.2 B.3 C.4 D.5 3TheessayTimeOutorBurnOutfortheNextGenerationsuggeststhat. A.everystudentmusttakeagapyearbeforeapplyingforafamousuniversity B.somefamousuniversitiesencouragestudentstogainmorelifeexperiences C.takingagapyearcanmakestudentsfreefromlifelearning D.thestressofstudiesdoesharmtothestudents'health 4Whatcanwelearnfromthepassage? A.Booksandmediahavecontributedtothestudents'interestinschoollearning. B.CharlesDeacondoesn'tsupporttheideaofthestudents'takingagapyear. C.Parentsnightdisagreewiththeprogramconcernedabouttheirchildren'sfuture. D.Expertsagreetakingayearoffwillbenefitthestudentsemotionallyandphysically.
某无色透明的溶液中能大量共存的离子组是
8分RichasaKingWilliam1whoconqueredEnglandsome930yearsagohadwealthpowerandanarmy.YetalthoughWilliamwasveryrichbythestandardofhistimehehadnothinglikeaflushtoilet抽水马桶papertowelsorridinglawnmower除草机.Howdidhegetby?Historybooksarefilledwithwealthypeoplewhowerepoorcomparedtome.IhavestormwindowsCroesusdidnot.EntirenationstrembledbeforeAlexandertheGreatbuthecouldn'tbuycatfood.CzarNicholaslackedanelectricsaw.GivenhowmuchbetteroffIamthansomanyfamousdeadpeopleyou'dthinkI'dbecontent.ThetroubleisthatlikemostpeopleIcomparemywealthwiththatoflivingperson:neighborsschoolclassmatesfamousTVpeople.ThegreedIfeeltowardmyfriendHoward'snewkitchenisnotreducedbythefactthatnokingseverhadarefrigeratorwithglassdoorsThereisreallynorisingorfallingstandardofliving.Overthecenturiespeoplesimplyfinddifferentthingstofeelsadabout.You'dthinkthatsimplynothavingdiseasewouldputusinagoodmoodbutnowewantahotbathtoo.Ofcourseonewaytoachievehappinesswouldbetorealizethatevenbytoday'sstandardsthethingsIownareprettynice.MyhouseissmallerthanthehousesofmanyinvestmentbankersbutevensoithasalotmoreroomsthanmywifeandIcankeepclean.Besidestopeoplelookingbackatourerafromacenturyortwointhefuturethesebankers'fancycountertopsandmyawnwornFormicawillseemequallyshabbyIcan'tkeepupwithmyneighborsrightnow.Butjustwait.1.Whatdocstheunderlinedphrase'getby'inthefirstparagraphmean?A.Succeedasaking.B.Dealwithcomplains.C.Getsomeextramoney.D.Liveinasatisfactoryway.2.Howmanyhistoricalfiguresarementionedtocomparelivesinthepastandpresent?A.3.B.4.C.5.D.6.3.Accordingtothepassagetheauthorintendsto.A.tellustobecontentwithlifeB.warnustoliveinasimplewayC.leachustolearnlessonsfromlifeD.encourageuslostruggleforwealth4.What'stheauthor'sattitudetowardslife?A.Doubtful.B.Optimistic.C.Uncaring.D.Cautions.
30分BeingjoblessforthelastthreemonthsIamupsetnowadays.Mysonhaslosthis1fromagoodschoolandhemighthavetogotoalessqualifiedschool.Ihavemovedfromaspacious宽敞的apartmenttoasmalloneinorderto2mylivingexpenses.Mywifehasbuiltextrastress.Ontopofthatmyfatherin﹣law3aweekagowhichhasaddedfueltofire4ourfamilyintoamoreterriblestate.InthesecircumstancesIhavetwomental5:eithertofeelupsetandkeeplosingmypeaceofmindor6mynegativethoughtswithsupermentalpowersaboutself﹣confidenceandconsistencyand7applyingfornewjobswithpositiveattitude.IchoosethesecondoptionbecauseIbelievethatthepainIam8todaywillbuildupmy9.Mystrengthswillthenincreasesmyconfidenceandmakemeagoodtimesmakemea10manoneday.Iunderstandthatgoodandbadstagesarepartof11.Whilegoodtimesmakemehappybadtimes12the‘inner'me.Twomonthslater13Ihavefinallylandedonajobwhichisveryexcitingandoffersanicesalary.Timehashealedmywife'smentalstress14thedeathofherfather.Mysonhasalreadybeenacceptedbyanothergoodschoolbecausetheadmissionsfornewacademicyearwerestill15!AsIambackonthetrackofnormallifeIcan16saythatthemostimportantthingsthathelpedme17thecrisis危机weremyconsistentcharacterofpatienceand18attitudetowardslife.SowhileIwishyouallthebestlifecan19youIwouldhighlyrecommendtakingthesameattitudetowardslife20youaretrappedinanyofsuchsituations.1.A.admission B.benefit C.diploma D.permission2.A.share B.reduce C.break D.raise3.A.showedup B.setoff C.felldown D.passedaway4.A.putting B.finding C.forming D.lifting5.A.problems B.concerns C.choices D.activities6.A.link B.replace C.mix D.exchange7.A.regret B.stop C.keep D.risk8.A.practicing B.suffering C.producing D.relieving9.A.intelligence B.body C.character D.reputation10.A.carful B.hard﹣working C.easy﹣going D.successful11.A.life B.wealth C.time D.health12.A.hide B.destroy C.strengthen D.kill13.A.desperately B.unwillingly C.hopefully D.fortunately14.A.regardlessof B.dueto C.insteadof D.apartfrom15.A.occupied B.empty C.open D.closed16.A.disappointedly B.surprisedly C.deliberately D.confidently17.A.fight B.meet C.change D.delay18.A.general B.positive C.friendly D.honest19.A.offer B.expect C.manage D.send20.A.asif B.inthat C.nowthat D.incase
15分RecentlyanIndianfilm'HindiMedium'hasmade1hit!Ittoldastorythatacouplesparednoeffort2givetheirdaughterthe3goodeducationandfinallyshewasacceptedbytheeliteofDelhi.ActuallythisphenomenoncanalsobeseeninChina.Todaymoreandmoreparentsadopttheideaof''personalqualityeducation'andcommittoencouragingtheirchildrentocultivateavarietyofinterestsoutsidethe4traditionclassroomactivitieslikeplayingtheviolinrobotprogrammingandsoon.Butparticipating5toomanyextracurricularactivitiesdoesdeprivethechildrenoftheirplaytime.It6pointoutthatmoreChineseparentsneedtorealizethatthehand﹣holdingmentalityisoverwhelmingtheirchildren.Theyhavetoloosentheircontrolgivethekidstimeof7theyownandletthemtaketheinitiative.Todayparentsworry8endlessaboutpreparingthekidsfortherealworldabattlefieldwhereeveryonemustarmthemselvesforafight.Butthereisnodenying9thebesttimesinlifearethose10stealmomentswespendwithothers﹣anidleafternoonwithabelovedcompanionacupofteawithanoldfriendorasimplegameoftagwithclassmatesafterschool.
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