首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
下列实验过程中没有颜色变化的是（ ）
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
烟叶在烘烤过程中颜色变化其实质是
下列实验过程中不会出现颜色变化的是
木炭粉与氧化铜共热
二氧化碳通入烧碱溶液
活性炭放入红墨水中
二氧化碳通入石蕊溶液中
在印刷过程中混合的色料越多颜色
越亮
越暗
没有变化
丰富
观察植物细胞的质壁分离与复原叶绿体中色素的提取和分离探究温度对淀粉酶活性的影响这三个实验的共同点是
实验设计中都需要有对照
实验过程中都需要进行加热
实验结果都有颜色变化
实验材料都始终保持生物活性
下图表示稀盐酸和氢氧化钠溶液发生反应过程中溶液的pH变化根据图像信息回答问题1进行该反应的实验操作是
下图表示稀盐酸和氢氧化钠溶液发生反应过程中溶液的pH变化根据图像信息回答问题1进行该反应的实验操作是
下列实验过程中不会出现颜色变化的是
木炭粉与氧化铜共热
二氧化碳通入烧碱溶液
活性炭加入红墨水中
二氧化碳通入石蕊溶液
树脂在使用过程中从树脂颜色变化上可以判断出树脂被污染的程度
检测生物组织中还原糖脂肪和蛋白质观察DNA和RNA在细胞中的分布探究温度对酶活性的影响模拟尿糖的检测
实验结果都有颜色变化
实验过程中都要用到斐林试剂
实验过程中都要加热
实验设计中都需要有对照组
观察植物细胞的质壁分离与复原叶绿体中色素的提取和分离温度对酶活性的影响DNA的粗提取与鉴定这四个实验
实验材料都要保持生物活性
实验设计中都需有对照
实验过程中均要加热
实验结果都有颜色变化
请分析下表回答有关实验的问题B组实验中应观察到的实验现象是在该组实验中选择甘蔗为生物材料实验过程和方
在滴定过程中指示剂发生颜色变化在转变点叫做
金属指示剂之所以能指示滴定过程中金属离子浓度的变化情况是由于的颜色与的颜色有明显的不同
观察植物细胞的质壁分离与复原叶绿体中色素的提取和分离探究温度对酶活性的影响这三个实验的共同点是
实验设计中都需要有对照
实验过程中都需要进行加热
实验结果都有颜色变化
实验材料都始终保持生物活性
在TIG焊过程中破坏和清除氧化膜的措施是
焊丝中加锰和硅脱氧
采用直流正接焊
低熔共晶较多
熔化时没有显著的颜色变化
在加热过程中肉的颜色和蛋白质有何变化
颜色的变化常被作为生物实验过程中结果观察的一项重要指标下面是实验人员在生物实验中碰到的有关颜色异常的
下列实验过程中不会出现颜色变化的是
木炭粉与氧化铜共热
澄清石灰水滴入稀盐酸中
活性炭加入红墨水中，振荡
二氧化碳通入紫色石蕊溶液
绿颜色蔬菜在后熟过程中颜色发生的变化是绿色衰退和白色增强
颜色的变化常被作为生物实验过程中结果观察的一项重要指标下面是实验人员在生物实验中碰到的有关颜色异常的
热门试题
更多
“双十一”已经成为网民们的网购狂欢节某电子商务平台对某市的网民在今年“双十一”的网购情况进行摸底调查用随机抽样的方法抽取了100人其消费金额t百元的频率分布直方图如图所示 1求网民消费金额t的平均值和中位数t0 2把下表中空格里的数填上能否有90%的把握认为网购消费与性别有关 附表 ．
在△ABC中内角ABC所对的边分别为abc．已知△ABC的面积为3b﹣c＝2cosA＝﹣则a的值为．
某种产品的广告费支出x与销售额y单位万元之间有下表关系y与x的线性回归方程为当广告支出5万元时随机误差的效应残差为
用数字12346组成没有重复数字的五位数其中偶数的个数为
已知△ABC的内角ABC的对边分别为abc且acosB＝2c﹣bcosA． Ⅰ求角A的大小 Ⅱ若a＝6求△ABC面积的最大值．
过双曲线＝1a＞0b＞0的一个焦点作实轴的垂线交双曲线于AB两点若线段AB的长度恰等于焦距则双曲线的离心率为
i是虚数单位＝
在工商管理学中MRP指的是物质需要计划基本MRP的体系结构如图所示．从图中能看出影响基本MRP的主要因素有个．
Bytheendoftheyeara3D﹣printedbridgewillbeputtouseinChinaforthefirsttime. Different1traditionalbridgesits2createdesigndoesn'tusereinforcedconcrete.Itismadeofanewmaterial3designtoweatherrainandsunfor4extendedperiodandthat'sdurableenoughtomeetnationalconstructionindustrystandards.Ifpartsofthebridgebecomedamagedtheycanberepaired5separate. The15﹣meter﹣longfootbridgeinShanghai6willhaveservicelifeofupto30yearswilltake35daystobuildaccordingto7itchiefarchitect.Thecomplexcurvedsurfacesofthebridgecanonlybeachievedby8use3Dprintingtechnology.Basedonlaboratorytestingitcanbearaloadof250kilogramspersquaremeter. Thisisn'tthefirsttimethata3D﹣printedbridge9makeinChina.InJulylastyearTongjiUniversityinShanghaimadetheworld'sfirsttwo3D﹣printedpedestrianbridges. 10thatpairofbridgeswasonlybuiltasademonstrationandnotforactualuse.
如图已知多面体PABCDE的底面ABCD是边长为2的菱形PA⊥底面ABCDED∥PA且PA＝2ED＝2． 1证明平面PAC⊥平面PCE 2若直线PC与平面ABCD所成的角为45°求二面角P﹣CE﹣D的余弦值．
Thewordtoleranceiswidelyusedinliberaldemocracies自由民主.Itindicatesapositivemeaning.Politiciansurgeustobetoleranttowardsminorities.Educatorsteachustobetoleranttowardstheother.Thepressisfullofreferencestotheneedtodisplaytolerancewhenfacedwithindividualsorgroupsespousingadifferentvieworholdingadifferentreligiousbelief.Atolerantsocietyisanobjectivesoughtafterbyanyonewhobelievesinthevaluesofdemocracy.Atolerantindividualisconnectedwithvirtuousqualities. Thequestionwemustaskiswhetherwehavebeenusingthewordtolerancefullyawareofitsmeaningandwhetherwehaveapplieditcorrectlytoreflectwhatwereallywishtoconvey. Thewordtolerancemeanstobearortobearwith.IfItoleratesomethingorsomeoneIbasicallysaythatIamreadytobearitorhim.Icantolerateabadsmelloranoisyneighbour.TheactoftolerationforcesmetodesistfromconveyingmyobjectiontotheexistenceofaphenomenonwhichIfinddifficulttobear.Abadsmelloranoisyneighbourisconsideredbymetobeanobjectionablephenomenon.BytoleratingeitherofthemIamnottransformingthebadsmellorthenoisyneighbourintopositivephenomena.Let'sbehonest:Idon'thaveadifferenttastewhenitcomestobadsmells.Isimplydislikeitandhopethatitdisappears.Idon'trespectthenoisyneighbour.IwouldratherhavehimstopatoncethenoiseheismakingsoIcanliveinpeace. Thesubjecttoleratingisbynaturenotequaltotheobjectbeingtolerated.IfItolerateyouIessentiallysaythatIamaboveyouandampreparedalthoughunwillinglytobearwithyourpresenceorwithyourpracticesoropinions.Thatmaybetrueinthecaseofanindividualwhoisreadytotoleratetheother.Howeverthisattitudebysuchanindividualthoughempiricallytrueishardlyavirtue.Certainlythefactthatanindividualinrealitymaymerelytoleratetheotherorhisopiniondoesnotjustifyagovernmentoranyofficialauthoritypromotingtoleranceasavirtue.Onecannottolerateanequalbeing.Trueequalityinvolvesrespectnottoleration.Torespecttheotherasadistinctivepersonishardlytotoleratehim.Thisisthetruemeaningofequality:diversityexistinginamutually﹣respectfulsocio﹣legalsetting. Atolerantattitudeinvolvesthegrantofafavournotaright.Thequestionweshouldaskourselvesiswhetherwewouldeverwishaparliamenttomakelawsconsideringusasindividualsandaspartofacollectiveentityorapermissiontopursuecertainactionsinterpretedasafavourratherthanaright?Indeedwouldweeverwishanyonetolistentoourviewsandacceptusthewaywearesimplybecauseheiskindenoughtotolerateus? 1Thefirsttwoparagraphsaremainlyintendedtoshowthat. A.toleranceisasymbolofliberaldemocracies B.democraticsocietyalwaysadvocatestolerance C.people'sunderstandingoftoleranceisone﹣sided D.tolerancecanbeappliedtomanysituations 2Theexampleofabadsmellandanoisyneighbourisraisedtoindicatethat. A.thewriterarefedupwiththem B.mostpeoplefindthemhardtotolerate C.thewriterisn'tprejudicedagainstthem D.toleratingthemisn'tavirtuousact 3ThemainideaofParagraph4isthat. A.toleranceshowsanunequalrelationship B.mostpeoplepromotetoleranceasavirtue C.peopleshouldshowrespectforeachother D.tolerancehasnothingtodowithrespect 4Whichcanbethebesttitleforthispassage? A.ToleranceandRespect B.WhatIstoBeTolerated? C.IsToleranceaVirtue? D.ShouldPeopleBeTolerant?
InthewintermonthsthetemperatureinmostofCanadausuallystaysbelow0℃.HoweverinsomepartsofCanadasuchassouthernBritishColumbiathetemperaturerarelygoesbelow0℃.Inmostareaswherepeoplelivesnowwillbeonthegroundfrommid﹣Decembertomid﹣March.ThoughCanada'swintermaybemuchcolderandlongerthanyouareusedtoitcanbeveryenjoyable.FormanyCanadiansbeingactiveinwinterisanimportantpartofenjoyinglife.Therearemanyoutdoorwinteractivitiesincludingskiingicefishingwalkingandskating.Joininginoneoftheseactivitiesmayhelpyouappreciatewinterandenjoyyourtimeoutsideinthesnow. Dressingforwinter DuringwinterinCanadayouwillneedwarmclothing.Ifpossiblearrivewiththeseitemsorbepreparedtobuythemsoonafteryourarrival.Youwillneed: ☆warmwaterproofboots☆ascarfforyourneck ☆ahatthatcoversyourears☆glovesforyourhands ☆thickwintercoatspantsandsweaters Layerskeepyouwarm It'sagoodideatolayeryourclothingbyforexamplewearingaT﹣shirtandasweaterunderneathajacket.Ifyoubecometoohotit'salwayseasiertoremoveapieceofclothingthantoaddanother.OntheWestCoastpreparetodressforcoolrainyorsnowyweather.Youwillneed: ☆awarmwaterproofcoat☆waterproofhats ☆anumbrella☆rainbootsorsnowboots LearnmoreaboutweatherandseasonsacrossCanada.YoucanalsocontactRelatedLinksforexampleanimmigrant﹣servingorganizationinthecommunitywhereyouliveformoreinformationaboutdressingforwinter. 1Whatisthemainpurposeofthefirstparagraph? A.TotellaboutthedetailsaboutCanada. B.Toshowmanyoutdoorwinteractivities. C.TointroducethedailylifeofCanadians. D.ToencourageyoutoenjoywinterinCanada. 2IfyouspendawinterinCanadayou'llpreparethefollowingEXCEPT. A.anumbrellaandsunglasses B.thickwintercoatsandpants C.waterproofhatsandcoats D.snowbootsandgloves 3Inwhichpartofanewspapercanyoufindthispassage? A.Business. B.Sports. C.Tourism. D.Health.
若点P为抛物线Cy＝2x2上的动点F为C的焦点则|PF|的最小值为
WhenIwasafreshmanincollegeIreceivedaletterthatforeveropenedawindowinmysoul.Ihadjuststartedwritingandthe1ofmylocalcountynewspaperhadbeenkindenoughto2someofmywork.Aboutamonthlaterthe3arrived. Hereiswhatitsaid.Youmaynot4me.Welastsaweachotherinkindergartenandmy5movedthenextyear.We6getthecountypaperinthemailthoughandwhenIsawyournameIhadtowriteyou.Youseethatfirstyearinschoolwasvery7forme.Iwasatiny8andordinary﹣lookinggirlthattheotherchildren9meeveryday.ThethingIrememberaboutyouisthatyou10did.Whenwe11togoouttheteacheralwaysputmebesideyouandyouwouldholdmyhandaswe12thestreet.Youtalkedtomeandplayedwithme.You13measapersonnotsomeonedifferentandIwillbeforever14forthat.Mywholelifewas15becauseofhowyoutreatedmeallthoseyearsago. Icarefullywrotebacktomykindergartenfriendandwe16forseveralyears17theillnessthatshehad18withsincechildhoodfinallytookherlife.IwillneverforgethoweverjusthowmuchthatsimplekindnessIhadshared19toher. Everyactofkindnesswedo20another'sheart.Everybitofgoodnesswesharemakestheworldabetterplace.Let'susethatpowerandmakebothEarthandHeavensmile. 1A.teacher B.director C.editor D.leader 2A.print B.publish C.report D.check 3A.newspaper B.message C.work D.letter 4A.remember B.recognize C.hear D.forget 5A.parents B.family C.school D.classmates 6A.still B.also C.just D.even 7A.busy B.happy C.difficult D.easy 8A.honest B.naughty C.sunny D.sick 9A.kidded B.helped C.hated D.beat 10A.occasionally B.never C.seldom D.always 11A.gotup B.linedup C.endedup D.cheeredup 12A.adventured B.visited C.cleaned D.crossed 13A.judged B.heard C.knew D.saw 14A.grateful B.hopeful C.regretful D.skillful 15A.harder B.better C.easier D.healthier 16A.cooperated B.corresponded C.lived D.worked 17A.after B.when C.before D.while 18A.experienced B.studied C.treated D.struggled 19A.meant B.done C.appeared D.got 20A.discovers B.obtains C.enriches D.touches
甲乙丙三位同学被问到是否看过ABC三本书时甲说我看过的比乙多但没看过C书乙说我没看过B书丙说我们三人看过同一本书．由此可判断乙看过的书为
BroadBand:byClaireL.Evans.Portfolio2018﹩27 Thoughoftenoutnumberedbymenwomenstayedintheboomingfieldofcomputing.InthisinspiringtalewriterEvansrecordsthecontributionsofsomeofthemanywomenwhoaidedtheriseofthemodernInternet. MemorablecharactersincludeElizabethJakeFeinleraninformationscientistwhohelpedresearchersnavigatetheArpaneandStacyHornwhostartedoneofthefirstsocialnetworksEcho. TheWizardandtheProphet:byCharlesC.Mann.Knopf2018﹩28.95 Thehumanpopulationismovingtoward10billion﹣﹣﹣someexpertsthinkwe'llnearlyhitthatmarkby2050.Howwilltheearthfeedhouseandotherwisesupportsuchacrowd?Environmentalthinkersusuallyfallintooneoftwocamps:thosewhopreferconservationandcontrollingconsumptionlikeWilliamVogtandthosewhotrustinnovationtosolveourproblemsNormanBorlaugforexample.WriterManncarefullyrecordsthelivesandthoughtofthefoundersofthesetwophilosophies. ALabofOne'sOwn:byPatriciaFara.OxfordUniversityPtess2018﹩24.95 InWorldWarImanywomenintheU.K.replacedtheirapronswithchemicalsuitsandsteppedintopreviouslymale﹣onlyfieldsofsciencewheretheyledwarresearchefforts.SciencehistorianFaraillustratesthelivesofmanyoftheseforgottenwomen.Althoughtheeramarkedamajorstepforwardforwomenscientistsmanyworkedforsmallwagesinanenvironmentofdiscrimination. Inthenearly100yearssincewomenhavecomealongwayFarawritesbuttheglassceilingsremainsolidandthepipelinesleaky. AtomLand:byJonButterworth.TheExperiment2018﹩19.95 Butterworthtakesreadersonanamusingjourneythroughtheunknownworldofparticle粒子physics.ThefirststopisAtomLandwhereButterworthexplainshowelectronsprotonsandneutronscometogethertobuildupeverythingweknow.Asthejourneyunfoldswelearnaboutlesser﹣knownparticles.Thankfullyourshipisequippedwithtoolssuchasmathematicalequations方程式andalaserlightthatlightsupthedarkestofconcepts. 1Whofocusesonthefutureofourearth? A.ClaireL.Evans. B.CharlesC.Mann. C.PatriciaFara. D.JonButterworth. 2Whichbookswillyouprobablyreadifyouareinterestedinwomen'scareer? A.BroadBand&AtomLand. B.TheWizardandtheProphet&AtomLand. C.BroadBand&ALabofOne'sOwn. D.ALabofOne'sOwn&AtomLand. 3What'sthepurposeofwritingthepassagesabove? A.Toclarifysomeconcepts. B.Tointroducesomefamouswriters. C.Tomakecommentsonsomebooks. D.Torecommendsomebooks.
德国数学家科拉茨1937年提出了一个著名的猜想任给一个正整数n如果n是偶数就将它减半即如果n是奇数则将它乘3加1即3n+1不断重复这样的运算经过有限步后一定可以得到1．对于科拉茨猜想目前谁也不能证明也不能否定现在请你研究如果对正整数n首项按照上述规则施行变换后的第8项为1注1可以多次出现则n的所有不同值的个数为
已知F为双曲线Ca＞0b＞0的左焦点直线l经过点F若点Aa0B0b关于直线l对称则双曲线C的离心率为
设1﹣im＝1+ni其中mn是实数则|m﹣ni|＝．
若xy满足约束条件目标函数z＝ax+y取得最大值时的最优解仅为13则a的取值范围为
假设你是李华得知你的英国好友Tom通过了来华支教的申请将于今年七月到边远地区教学.请根据下面的提示给他写封电子邮件: 1.表示祝贺; 2.分析可能遇到的挑战; 3.告知提前了解当地的风俗习惯. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯.
在等比数列{an}与等差数列{bn}中a1＝1b1＝﹣2a2+b2＝﹣3a3+b3＝﹣4． 1求数列{an}与数列{bn}的通项公式 2若cn＝an+bn求数列{cn}的前n项和Sn．
AprojectinGambiaisempoweringwomenandreducingdangerouswasteatthesametime. TheWasteInnovationCenterfundedbytheEuropeanUnion'sGlobalClimateChangeAllianceshowswomenintheBrikamaareahowtorecyclewasteintousefulmaterialsandproductswhichtheycanthensellinlocalmarkets. Wood﹣likewasteisrecycledintocharcoal木炭forexamplewhichcanbeusedtosupersedefirewoodandreducethenumberoftreesthatarecutdownforfirewood.Foodwasteisrecycledintocompost混合肥料tofunctionasenvironmentallyfriendlyfertilizersandplasticisturnedintomanyusefulthings. SupportedbyWasteAidUKandtheGambiaWomen'sInitiativeGWIamongotherstheprojectprovideswomenwithskillstheycanusetobecomeself﹣sufficient自给自足的.Womenlearningatthecentercomefromfivecommunitiesandsomeofthemtravelasfaras12milestolearntheseimportantskillsthatwillprovidethemwithanincomeaccordingtoTheGuardian. IsatouCeesaywhonowleadstheGWIhighlightedtheneedtofocusoneconomicequalityinhercountrytellingTheGuardianIntermsofeducationwomenaretheoneswhoarealwaysbehind.Boysarechosentogotoschool.Whenweconductourtrainingwefindwomencandoalotbutdon'tknowwhotheyareorhowtoimplement实施things. AccordingtotheWorldHealthOrganization'sCountryCooperationStrategy2008﹣2013reportthemainenvironmentalissuefacingGambiaispoorwastemanagementinurbanareas. NdeySirengBakurinexecutivedirectoroftheNationalEnvironmentAgencyhasvoicedconcernoverhealthandenvironmentalriskssuchaswaterpollutiontheincreaseofinsectsaswellasfloodingthatoccurasaresultofpoorwastemanagement. 1WhatdoestheWasteInnovationCentertrytodo? A.DeveloplocalmarketsinBrikama. B.Teachwomenhowtoinventnewthings. C.Keepwomenawayfromdangerouswaste. D.HelpwomeninBrikamabenefitfromwaste. 2WhatdoestheunderlinedwordsupersedeinParagraph2probablymean? A.Replace. B.Transform. C.Burn. D.Reserve. 3FromwhatIsatouCeesaysaidwecanlearnthatwomeninGambia. A.don'tlearnnewthingsfast B.aren'tinterestedineducation C.reallyhopeforeconomicequality D.arenotfairlytreatedinthecountry 4Whatisthewriter'spurposeofwritingthelastparagraph? A.Tosummarizethepreviousparagraphs. B.Toprovidesomeadviceforthereaders. C.Toaddsomebackgroundinformation. D.Tointroduceanewtopicfordiscussion.
国家放开计划生育政策鼓励一对夫妇生育2个孩子．在某地区的100000对已经生育了一胎夫妇中进行大数据统计得有100对第一胎生育的是双胞胎或多胞胎其余的均为单胞胎．在这99900对恰好生育一孩的夫妇中男方女方都愿意生育二孩的有50000对男方愿意生育二孩女方不愿意生育二孩的有x1对男方不愿意生育二孩女方愿意生育二孩的有x2对其余情形有x3对且x1x2x3＝30010099．现用样本的频率来估计总体的概率． 1说明“其余情形”指何种具体情形并求出x1x2x3的值 2该地区为进一步鼓励生育二孩实行贴补政策凡第一胎生育了一孩的夫妇一次性贴补5000元第一胎生育了双胞胎或多胞胎的夫妇只有一次性贴补15000元．第一胎已经生育了一孩再生育了二孩的夫妇一次性再贴补20000元．这种补贴政策直接提高了夫妇生育二孩的积极性原先男方或女方中只有一方愿意生育二孩的夫妇现在都愿意生育二孩但原先男方女方都不愿意生育二孩的夫妇仍然不愿意生育二孩．设ξ为该地区的一对夫妇享受的生育贴补求Eξ．
Doyoulikewritingafewparagraphseverydayaboutyourexperienceshopesmemoriesorfeelings?Ifyoudon'tit'stimetomakeachangenow.Writejustafewparagraphseverydayaboutyourexperienceshopesmemoriesandfeelingsandyouwillimmediatelybegintoexperiencebenefitstoyourpersonalgrowthandpotential. Youwillgraduallybecomebetteratexpressingyourself.1Howeverwhenyoubecomelazywithwordsyoufinditismoredifficulttodescribefeelingsshareexperiencesandmakeyourselfunderstood. 2Asyouwriteaboutmemoriesitislikeopeninganoldphotoalbum.Yourpenbeginstoexplorefeelingsanddetailsyouhaveforgottenanddreamsyouhaveleftbehind.Yousuddenlyrememberpeopleyouwouldliketocontactagain.Writingisanactivitythatavoidsdistraction使人分心的事longenoughforyoutoexplorethosewonderfulmomentsofthepast.Sometimestheyarefrightening3 Writingaboutdailyexperiencesandfeelingsprovidesarecordedhistorythatwillinfluencehowyoumakefuturedecisions4Theylearnedfromwhathadhappenedbefore.Yourhistoryisimportant.Don'tletitbeforgotten. Writingremindsyouofyourdreamsandkeepsyoumovingtowardthem.Itisameansofkeepingtrackofyourpurposeandthegoalsthatwillleadyoutoachievethem.5Itshowswhenyouhavebeendistractedandmayneedtogiveallyourattentionagaintoyourwriting. Writingalittleeverydaycouldprovidethematerialthatsomedaybecomesapublishedbook.WhenIwroteaboutmydepressionandmyfour﹣year﹣oldgranddaughterwhogotlostinthemountainsIneverdreameditwouldbeinabook. A.Youwillrememberthingslongforgotten. B.Writingkeepsyouenergeticandfullofimaginationallthetime. C.Sometimestheyarewonderfulandalmostalwaystheyarehelpful. D.Soonerorlateryouaresurelytobecomeagreatprofessionalwriter. E.Reviewingwhatyouhavewrittenisaperfectwaytoseeyourprogress. F.There'sareasonthatthegreatestleadersinhistorywerestudentsofhistory. G.Whenyouwritedailyyoucanalwaysbeamazedathowquicklyyourwritingskillsimprove.
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. RecentlywehavehadainstructivediscussiononhowtomakeEnglishlearningrelaxingandinteresting.It'salltoonaturalthatwehadcomeupwithalotofadvicesconcerningthetopic.FirstlywecanhavemoreinteractiveactivitiesthatmakesEnglishlearninggreatfuninclassanditisgenerallyconsiderednotalittlebeneficiallytousall.SecondlyweneedtofindmorechancestocommunicatingwithpeopleinEnglishwhethertheyareEnglishteachersandclassmatesbecauseusingEnglishisthebestwaytolearn.Asitisknowntoallpracticemakesperfect. InmyeyestherearemanyotherwayslikelisteningEnglishsongswatchingEnglishmoviesjoiningEnglishclubsormakingpenfriendsontheInternet.Thatweneedmostismoretimeandmorespace.
i是虚数单位＝
假设东莞市市民使用移动支付的概率都为p且每位市民使用支付方式都相互独立的已知X是其中10位市民使用移动支付的人数且EX＝6则p的值为
设1﹣im＝1+ni其中mn是实数则|m﹣ni|＝．
设0＜p＜1随机变量ξ的分布列是 则当p在01内增大时
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
湘公网安备 43130202000226号