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氧化还原指示剂的选择原则是 ① 。
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关于氧化还原滴定法所用的滴定反应指示剂下列说法错误的是
氧化还原指示剂在氧化还原滴定中不参与氧化还原反应并发生颜色变化
氧化还原指示剂在氧化还原滴定中参与氧化还原反应而发生颜色变化
氧化还原滴定法中高锰酸钾法可以用高锰酸钾作为自身指示剂指示终点
淀粉是碘量法的专用指示剂
指示剂一般分为酸碱指示剂氧化还原指示剂和
选择氧化还原指示剂的原则是什么
高锰酸钾法通常使用的滴定指示剂属于
专属指示剂；
氧化还原指示剂；
自身指示剂；
酸碱指示剂。
铬黑T指示剂属于哪种指示剂
酸碱指示剂
金属指示剂
氧化还原指示剂
沉淀滴定指示剂
氧化还原指示剂是具有氧化还原性的有机化合物本身会消耗滴定剂所以应对指示剂作空白校正
氧化还原滴定法的指示剂有本身指示剂特效指示剂和氧化还原指示剂三类其中亚铁盐中铁含量的测定中二苯胺磺酸
在氧化还原滴定中不能指示滴定终点的到达
电位法
氧化还原指示剂
铁铵矾指示剂
自身指示剂
影响氧化还原滴定突跃电位的主要因素有①和②氧化还原指示剂的选择原则是③
氧化还原指示剂与酸碱指示剂有什么不同
氧化还原指示剂是在氧化还原滴定理论终点附近颜色从而确定滴定终点实际上该指示剂本身就是或
简述氧化还原指示剂的种类
在碘量法中用淀粉作指示剂淀粉指示剂是常用的
氧化还原指示剂
自身指示剂
吸附指示剂
专属指示剂
二苯胺磺酸钠属于
金属指示剂
氧化还原指示剂
酸碱指示剂
在氧化还原法滴定中高锰酸钾法使用的是
特殊指示剂；
金属离子指示剂；
氧化还原指示剂；
自身指示剂。
氧化还原指示剂的变色原理和选择原则
氧化还原指示剂的选择原则是应选择指示剂的标准电位在滴定范围内 尽量靠近滴定终点的指示剂
氧化还原滴定指示终点的方法有
自身指示剂
特殊指示剂
氧化还原指示剂及电化学法
A+C
A+B+C
铬黑T属于
酸碱指示剂
氧化还原指示剂
配位指示剂
氧化还原滴定法所用的指示剂分为三种氧化还原指示剂和专 属指示剂
酚酞指示剂
淀粉指示剂
钙红指示剂
自身指示剂
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2006年12月中央经济工作会议强调做好2007年经济工作要继续实施稳健的财政政策和货币政策下列属于运用货币政策调控经济的有
供求机制是通过
近年来我国东南沿海地区出现了较大面积的民工荒与此同时农村地区又存在着部分劳动力富余的问题这一现象说明
我国国有大中型企业改革的方向是实行规范的股份制这是因为股份制是
通过建立现代企业制度国有企业应
商品经济和市场经济的相互关系是
在社会主义市场经济体制中市场体系
实现公有制与市场经济相结合的有效途径是
Directions:Readthefollowingtextcarefullyandthentranslate theunderlinedsegmentsintoChinese.Yourtranslationshouldbewrittenneatly onANSWERSHEET2. Oncetheexclusivedomainofexecutiveswithexpenseaccounts mobilephonesaresettobecomeoneofthecentraltechnologiesofthe21st century.46Withinafewyearsthemobilephonewillevolvefroma voice-onlydevicetoamulti-functionalcommunicatorcapableoftransmittingand receivingnotonlysoundbutvideostillimagesdataandtext.Awhole neweraofpersonalcommunicationisontheway.Thanksinpart tothegrowthofwirelessnetworksthetelephoneisconvergingwiththe personalcomputerandthetelevision.47Soonlight-weightphonesoutfitted withhighresolutionscreens--whichcanbeembeddedineverythingfrom wristwatchestopalm-heldunitswillbeconnectedtoseriesofloworbit satellitesenablingpeopletotalksendandreceiveE-mailortakepartin videoconferencesanytimeanywhere.Thesephonesmightalsoabsorbmanyof thekeyfunctionsofthedesktopcomputer.Mobiledevicesareexpectedtobe idealforsomeofthenewpersonalizedservicesthatarebecomingavailablevia theInternet.Thecommunicationsrevolutionisalreadytaking shapearoundtheglobe.InEuropemall-scaletrialsareunderwayusingmobile phonesforelectroniccommerce.Forexamplemostphonescontainasubscriber identificationmoduleSIMcardthatservesprimarilytoidentifyausertothe phonenetwork.SomemanufacturersplantoupgradetheSIMcardtoanall-in-one personalidentificationandcreditcard.Anotherapproachistoaddaslotto mobilephonesforasecondsmartcarddesignedspecificallyformobile ecommerce.48ThesecardscouldbeusedtomakepaymentsovertheInternet orremovedfromthephoneforuseinpointof-saleterminalstopayforthings likepublictransportationmovieticketsoraroundofdrinksatthebar. InFranceMotorolaiscurrentlytestingadualslotphone theStarTACDinatrialwithFranceTelecomwhileinFinlandNokiaistesting aphonethatusesaspecialpluginreaderforatinysmartcard.Siemensis pursuingadifferentapproach.49Sinceitisnotveryclearwhether it’sbesttodoeverythingwithasingledeviceSiemensisdevelopingdualslot phonesandEinsteinadeviceequippedwithasmartcardreaderandkeypadthat canbelinkedtothephoneviainfraredwirelesstechnology. 50Forthosewhowanttothoughitwillbepossibletoreceive almostallformsofelectroniccommunicationthroughasingledevicemost likelyathree-in-onephonethatservesasacordlessathomeacellphoneon theroadandanintercomatwork.Themobilephonewillbecomeincreasingly multifunctionalsaysBurghardtSchallenbergervicepresidentfortechnology andinnovationatSiemensInformationandConsumerProducts.
价格机制得以发挥作用的形式
我国宏观经济调控的基本目标是
政府对因生老病死灾害事故心身障碍等而发生困难的革命烈士家属现役军人家属革命残疾军人复员退伍军人提供经济医疗及其他方面的优待抚恤属于
Directions:Thefollowingparagraphsaregivenina wrongorder.ForQuestions41-45youarerequiredtoreorganizethese paragraphsintoacoherenttextbychoosingfromthelistA-Gtofillineach numberedbox.Thefirstandthelastparagraphshavebeenplacedforyou inBoxes.MarkyouranswersonANSWERSHEET1. [A]Yetthievesstillreaparichharvest.Inadequate protectionofU.S.patentstrademarksandcopyrightscoststheU.S.economy$ 80billioninsaleslosttopiratesand250000jobseveryyearaccordingto GaryHoffmananintellectualpropertyattorneyatDicksteinShapiro& MorininWashington.Thecomputerindustrylosesupwardsof$4billionof revenuesayeartoillegalcopyingofsoftwareprograms.Piracyofmoviesbooks andrecordingscoststheentertainmentbusinessatleast$4billion annually.[B]Withintellectualpropertynowaccountingformore than25%ofU.S.exportscomparedwithjust12%eightyearsagoprotection againstinternationalpiracyrankshighontheBushAdministration’strade agenda.TheU.S.InternationalTradeCommissionthefederalagencythat dealswithunfair-tradecomplaintsbyAmericancompaniesishandlingarecord numberofcases38lastyearSaysITCChairmanAnneBrunsdale:Conceptual propertyhasreplacedproduceandheavymachineryasthehotbedoftrade disputes.[C]Thebattleiswidening--U.S.companiesfiled morethan5700intellectual-propertylawsuitslastyearincontrastto3800in 1980--andthestakescanbeenormous.Inthebiggestpatent-infringementcaseto dateEastmanKodakwasorderedlastOctobertopay$900millionfor infringingonSevenPolaroidinstant-photographypatents.Inafar-reaching copyrightcasebookpublishersscoredanimportantvictoryinMarchwhena federalcourtinNewYorkCityfinedtheKinko’sGraphicsnationalchainof copyingstores$510000forillegallyphotocopyingandsellingexcerptsofbooks tocollegestudents.[D]Althoughtheverdictissubjectto appealtheawardunderscoresthegrowingimportanceofprotectingintellectual property.ThatphrasemayseementirelytoograndtoapplytoasonglikeIfYou Don’tWantMyPeachesYou’dBetterStopShakingMyTreebutitactually encompassesthewholevastrangeofcreativeideasthatturnouttohavevalue --andmanyofthemhavemorevaluethanever.FromWaltDisney’sMickeyMouseto Upjohn’sformulaforitsanti-baldnesspotionpatentstrademarksand copyrightshavebecomecorporatetreasuresthattheirownerswilldoalmost anythingtoprotect.[E]Inaneconomyincreasinglybasedon informationandtechnologyideasandcreativityoftenembodymostofa company’swealth.Thatiswhyinnovationsarebeingpatentedtrademarked andcopyrightedinrecordnumbers.Itisalsowhytoday’scleverthiefdoesn’t robbanksmanyofwhicharebrokeanyway;hemakesunauthorizedcopiesofKevin Costner’slatestfilmsellsfakeCartierwatchesandstealstheformulafor Merck’snewestpharmaceutical.That’swherethemoneyis.[F] Onereasonisthatanycountriesofferonlyfeebleprotectiontointellectual property.Realizingthatsuchlaxnesswillexcludethemfrommuchworldtradeas wellashobblenativeindustriesnationseverywherearerevisinglawscovering patentscopyrightsandtradenames.MalaysiaEgyptChinaturkeyBraziland eventheSovietUnionhaveallrecentlyannouncedplanseithertoenactnewlaws orbeefupexistingsafeguards.InanefforttowinU.S.congressionalsupport foraproposedfree-tradepactMexicolastmonthrevealedplanstodoublethe lifeoftrademarklicensesto10yearsandextendpatentprotectionforthe firsttimetosuchproductsaspharmaceuticalsandfood.[G] Companiesarecrackingdownonpirateswhostealdesignsmoviesandcomputer programs.Thebattleisgettinghotter--andmoreimportant.WhenJohnson &Johnsonintroducedanewfiber-glasscastingtapeforbrokenbonesseveral yearsagoexecutivesatMinnesotaMining&Manufacturingflewintoarage. Thetapewhichsetsfracturesfasterthanplasterwasremarkablysimilarin designandfunctiontoacastingtapedevelopedby3Mscientists.TheSt. Paul-basedcompanyquicklysuedchargingJ&Jwithviolatingfourofits patents.Lastmonthafederalcourtbacked3MandorderedJ&Jtopay$116 millionindamagesandinterest--thefourthlargestpatent-infringement judgmentinhistory.Order:
现代市场经济的共同特点是
Directions:Readthefollowingtextcarefullyandthentranslate theunderlinedsegmentsintoChinese.Yourtranslationshouldbewrittenneatly onANSWERSHEET2. Oncetheexclusivedomainofexecutiveswithexpenseaccounts mobilephonesaresettobecomeoneofthecentraltechnologiesofthe21st century.46Withinafewyearsthemobilephonewillevolvefroma voice-onlydevicetoamulti-functionalcommunicatorcapableoftransmittingand receivingnotonlysoundbutvideostillimagesdataandtext.Awhole neweraofpersonalcommunicationisontheway.Thanksinpart tothegrowthofwirelessnetworksthetelephoneisconvergingwiththe personalcomputerandthetelevision.47Soonlight-weightphonesoutfitted withhighresolutionscreens--whichcanbeembeddedineverythingfrom wristwatchestopalm-heldunitswillbeconnectedtoseriesofloworbit satellitesenablingpeopletotalksendandreceiveE-mailortakepartin videoconferencesanytimeanywhere.Thesephonesmightalsoabsorbmanyof thekeyfunctionsofthedesktopcomputer.Mobiledevicesareexpectedtobe idealforsomeofthenewpersonalizedservicesthatarebecomingavailablevia theInternet.Thecommunicationsrevolutionisalreadytaking shapearoundtheglobe.InEuropemall-scaletrialsareunderwayusingmobile phonesforelectroniccommerce.Forexamplemostphonescontainasubscriber identificationmoduleSIMcardthatservesprimarilytoidentifyausertothe phonenetwork.SomemanufacturersplantoupgradetheSIMcardtoanall-in-one personalidentificationandcreditcard.Anotherapproachistoaddaslotto mobilephonesforasecondsmartcarddesignedspecificallyformobile ecommerce.48ThesecardscouldbeusedtomakepaymentsovertheInternet orremovedfromthephoneforuseinpointof-saleterminalstopayforthings likepublictransportationmovieticketsoraroundofdrinksatthebar. InFranceMotorolaiscurrentlytestingadualslotphone theStarTACDinatrialwithFranceTelecomwhileinFinlandNokiaistesting aphonethatusesaspecialpluginreaderforatinysmartcard.Siemensis pursuingadifferentapproach.49Sinceitisnotveryclearwhether it’sbesttodoeverythingwithasingledeviceSiemensisdevelopingdualslot phonesandEinsteinadeviceequippedwithasmartcardreaderandkeypadthat canbelinkedtothephoneviainfraredwirelesstechnology. 50Forthosewhowanttothoughitwillbepossibletoreceive almostallformsofelectroniccommunicationthroughasingledevicemost likelyathree-in-onephonethatservesasacordlessathomeacellphoneon theroadandanintercomatwork.Themobilephonewillbecomeincreasingly multifunctionalsaysBurghardtSchallenbergervicepresidentfortechnology andinnovationatSiemensInformationandConsumerProducts.
转变政府职能的根本途径是
Directions. Arecruitmentdrivefor100000OlympicvolunteerswhichaimstohelptheChineseandforeignersgetinvolvedinthe2008GameswasofficiallylaunchedinBeijinglastmonth.Youintendtoapplyforcertainpositionsandnowwritealettertherecruitmentofficeshowingyourmotivationandstatingyoureligibilityfortherequirements. Writeyourletterinnolessthan100words.WriteitneatlyonANSWERSHEET2. DonotsignyourownnameattheendoftheletteruseLiMinginstead. Donotwritetheaddress.
建立社会主义市场经济体制就要使市场
现代企业制度中出资者的所有权益包括
我国所要建立的现代企业制度其基本特征有
中国人民银行决定从2007年3月18日起上调金融机构存贷款基准利率并放宽人民币贷款利率浮动区间和允许人民币存款利率下浮上调人民币基准利率的意义是
当前建立和完善社会保障体系首先要坚持完善的保障线制度有
我国经济体制改革的目标是
在市场经济比较发达的国家凡出现通货紧缩一般都是在财政和货币政策方面实行
我国实施社会保障的基本目标是
竞争机制是
在经济发展过程中我们既可以发挥市场经济的优势又可以发挥社会主义制度的优越性在处理市场机制和宏观调控当前发展和长远发展效率和公平等关系方面能够比西方国家做得更好和更有成效这是因为
建立社会主义市场经济体制就必须使国有企业真正成为
建立社会主义市场经济体制首先要使
社会主义市场经济的特殊性在于
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