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甲、乙两人下棋,甲获胜的概率是40%,甲不输的概率为90%,则甲、乙二人下成和棋的概率为( )
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甲乙两人下棋结果是一人获胜或下成和棋.已知甲不输的概率为乙不输的概率为则两人下成和棋的概率为.
甲乙两人下棋两人和棋的概率是乙获胜的概率是则乙不输的概率是
甲乙两人下棋两人下成和棋的概率是甲获胜的概率是则甲不输的概率为.
甲乙两人下棋和棋的概率为乙获胜的概率为则下列说法正确的是
甲获胜的概率是
甲不输的概率是
乙输了的概率是
乙不输的概率是
甲乙两人下棋甲获胜的概率是40%甲不输的概率为90%则甲乙两人下成平局的概率为________.
甲乙两人下棋甲获胜的概率为40%甲不输的概率为90%则甲乙二人下成和棋的概率为
60%
30%
10%
50%
甲乙两人下棋两人下和棋的概率为乙获胜的概率为则甲获胜的概率为_______________
甲乙两人下棋和棋的概率为乙获胜的概率为求1甲获胜的概率2甲不输的概率.
甲乙两人下棋甲获胜的概率为0.3两人下成和棋的概率为0.5那么甲不输的概率是________.
甲乙两人下棋甲获胜的概率是40%甲不输的概率为90%则甲乙两人下成平局的概率为
90%
60%
50%
40%
甲乙两人下棋甲获胜的概率是40%甲不输的概率为90%则甲乙二人下成和棋的概率为
60%
40%
10%
50%
甲乙两人下棋若甲获胜的的概率为甲乙下成和棋的概率为则乙不输棋的概率为.
甲乙两人下象棋甲获胜的概率是40%甲不输的概率是75%则甲乙两人下成和棋的概率是
60%
35%
15%
50%
甲乙两人下象棋甲获胜的概率是 30 % 两人下成和棋的概率为 50 % 则乙获胜的概率为______
甲乙两人下棋两人下和棋的概率为乙获胜的概率为则甲获胜的概率为_______________
甲乙两人下棋两人下成和棋的概率是0.3甲获胜的概率是0.2则乙获胜的概率为乙不输的概率为.
甲乙两人下棋甲获胜的概率为0.3甲不输的概率为0.8则甲乙两人下成和棋的概率为
0.6
0.3
0.1
0.5
甲乙两人下棋两人下成和棋的概率是乙获胜的概率是则是
乙胜的概率
乙不输的概率
甲胜的概率
甲不输的概率
甲乙二人下棋甲获胜的概率是0.3甲不输的概率为0.8则甲乙二人下成和棋的概率为________.
甲乙两人下棋甲获胜的概率为30%甲不输的概率为80%则甲乙下成和棋的概率为
70%
30%
20%
50%
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实验室制备己二酸的原理为 3+8KMnO4═3KOOCCH24COOK+8MnO2↓+2KOH+5H2O 主要实验装置和步骤如下 ①在右图装置中加入5mL10%氢氧化钠溶液和50mL水搅拌使其溶解然后加入6.3g高锰酸钾小心预热溶液到40℃. ②从恒压漏斗中缓慢滴加1.4mL环己醇控制滴速使反应温度维持在45℃左右反应20min后再在沸水浴上加热5min促使反应完全并使MnO2沉淀凝聚. ③加入适量亚硫酸氢钠固体除去多余高锰酸钾. ④通过操作得到沉淀和滤液洗涤沉淀2~3次将洗涤液合并入滤液. ⑤加热浓缩使溶液体积减少至10mL左右趁热小心加入浓硫酸使溶液呈强酸性调节pH=1~2冷却结晶抽滤洗涤干燥得己二酸白色晶体1.5g. 已知己二酸的电离平衡常数Ka1=3.8×10﹣5Ka2=3.9×10﹣6相对分子质量为146其在水中溶解度如下表 1步骤②中缓慢滴加环己醇的原因是. 2步骤④划线部分操作是在第④⑤布中均要求洗涤沉淀所用洗涤液依次为. 3步骤⑤加入浓硫酸调节pH成强酸性的原因是. 4己二酸产品的纯度可用酸碱滴定法测定.取样试样ag准确至0.0001g置于250mL锥形瓶中加入50mL除去CO2的热蒸馏水摇动使试样完全溶解冷却至室温滴加3滴酚酞溶液用0.1000mol•L﹣1的NaOH标准溶液滴定至微红色即为终点消耗NaOH标准溶液体积bmL ①下列说法正确的是. A.称取己二酸样品质量时先将锥形瓶放在电子天平秤盘的中央显示数字稳定后按“去皮”键归零键再缓慢加样品至所需样品的质量时记录称取样品的质量 B.摇瓶时应微动腕关节使溶液向一个方向做圆周运动但是勿使瓶口接触滴定管溶液也不得溅出 C.滴定时左手轻轻挤压玻璃球让液体自行呈线状流下 D.滴定结束后稍停1﹣2分钟等待滴定管内壁挂有的溶液完全流下时再读取刻度数 E.记录测定结果时滴定前仰视刻度线滴定到达终点时又俯视刻度线将导致滴定结果偏高 ②计算己二酸纯度的表达式为.
7.5分RaynorWinnandherhusbandMothbecamehomelessowingtotheirwronginvestment.Theirsavingshadbeenuseduptopaythedebts.What'sworseMothwasdiagnosedwithaseveredisease.Therewasnocureonlyanodyne止痛药.FailingtofindanyotherwayoutMothdecidedtomakeawalkingjourneytomakethebestofhislastlifewithhiswife. Thiswasalongjourneyofunaccustomedhardshipandsurprisingrecovery.WhenleavinghomeRaynorandMothhadjust£320inthebank.Theyplannedtokeepthebudgetlowbylivingonboilednoodleswithfewbettertreats. WildcampingisillegalinEngland.ToavoidbeingcaughttheWinnshadtogettheirtentuplateandpackeditawayearlyinthemorning.TheWinnssoondiscoveredthatdailyhikingintheir50sisalottougherthantheyrememberitwasintheir20s.Raynorachedalloveranddesiredabath.Mothmeanwhileafteraninitialstrugglefoundhissymptomswerestrangelyrelievedbytheirdailytiringjourney. Finallythecouplefoundthattheirbodiesturnedforthebetterwithre﹣foundstrongmuscles.Ourhairwasfriedandfallingoutnailsbrokenclothesworntoathreadbutwewerealive.DuringthejourneyRaynorbeganacareerasawriter.ShewritesHomelessnesshadtakeneverymaterial物质上的thingfrommeandleftmetornbareanemptypageattheendofapartlywrittenbook.Ithadalsogivenmeachoiceeithertoleavethatpageblankortokeepwritingthestorywithhope.IchosehopeandIanticipatethatabrilliantfutureisaroundthecorner. 1WhichofthefollowingstatementsabouttheWinnsisRIGHT? A.TheWinnsbecamehomelessduetoaseveredisease. B.Theymadethejourneytograspthelastcouple'stime. C.Theysparednoefforttosavemoneybynoteatinganythingbetter. D.DuringthejourneytheWinnskeepworkingouttoreducethepainthediseasebrought. 2WhichoftheorderabouttheeventsisRIGHT? a.discoveredthedisease b.startedwriting c.becamehomeless d.madethejourney A.cabd B.cadb C.acbd D.acdb 3Whatisthebesttitleofthisarticle? A.Apainfulhomelessnessanddisease B.Ajourneyinspiringtowrite C.Aspeciallifeanodyne D.Ajourneytocurediseaseandthemind
8分Theworldeconomyhasrunintoabrickwall.Despitecountlesswarningsinrecentyearsabouttheneedtodealwithapotentialhungercrisisinpoorcountriesandanenergycrisisworldwideworldleadersfailedtothinkahead.Theresultisaglobalfoodcrisis.Wheatcornandricepriceshavemorethandoubledinthepasttwoyears.Andoilpriceshaveincreasedmorethanthreetimessincethestartof2004.Thesefood﹣priceincreasescombinedwithincreasingenergycostswillslowifnotstopeconomicgrowthinmanypartsoftheworldandwillevenaffectpoliticalstability.Practicalsolutionstotheseproblemsdoexistbutwe'llhavetostartthinkingaheadandactingglobally. Herearethreestepstoeasethecurrentfoodcrisisandavoidthepotentialforaglobalcrisis.ThefirstistopromotethedramaticsuccessofMalawiacountryinsouthernAfricawhichthreeyearsagoestablishedaspecialfundtohelpitsfarmersgetfertilizerandseedswithhighproductivity.Malawi'sharvestdoubledafterjustoneyear.AninternationalfundbasedontheMalawimodelwouldcostamere$10perpersonannuallyintherichworldor﹩10billionaltogether. SecondtheU.S.andEuropeshouldabandontheirpoliciesofpayingpartlyforthechangeoffoodintobiofuels.TheU.S.governmentgivesfarmersataxpayer﹣financedpaymentof51centspergallonofethanol乙醇changedfromcorn.Theremaybeacaseforbiofuelsproducedonlandsthatdonotproducefoods﹣treecropsgrassesandwoodproducts﹣butthere'snocaseforthegovernmenttopaytoputtheworld'sdinnerintothegastank. Thirdweurgentlyneedtoweather﹣prooftheworld'scropsassoonandaseffectivelyaspossible.Forapoorfarmersometimessomethingassimpleasafarmpond﹣whichcollectsrainwatertobeusedindryweather﹣canmakethedifferencebetweenagoodharvestandabadone.TheworldhasalreadycommittedtoestablishingaClimateAdaptationFundtohelppoorregionsclimate﹣proofvitaleconomicactivitiessuchasfoodproductionandhealthcarebuthasnotyetacteduponthepromise. 1AninternationalfundbasedontheMalawimodelwould. A.costeachofthedevelopedcountries﹩10billionperyear B.aimtodoubletheharvestinsouthernAfricancountriesinayear C.decreasethefoodpricesaswellastheenergyprices D.givepoorfarmersaccesstofertilizerandhighlyproductiveseeds 2Withthesecondsteptheauthorexpressestheideathat. A.itisnotwisetochangefoodcropsintogas B.itismisleadingtoputtreecropsintothegastank C.weshouldgetalternativeformsoffuelinanyway D.biofuelsshouldbedevelopedonalargescale 3WhichofthefollowingisTrueaccordingtothepassage? A.Arain﹣collectingpondisasimplesafeguardagainstdryweather. B.AClimateAdaptationFundhasbeenestablishedtohelpthepoor. C.Theworldhasmadeaseriouspromisetobuildfarmponds. D.Itmakesagreatdifferencewhetherwedevelopfoodproductsornot. 4Inthepassagetheauthorcallsonusto. A.slowdownbutnottostopeconomic. B.developtreecropsgrassesandfoodproducts C.achieveeconomicgrowthandpoliticalstability D.actnowsoastorelievetheglobalfoodshortage
下列说法正确的是
8分Sprintusershopingtotakeadvantageofthecompany'scoming5Gnetworknowhaveamonthtolookforwardto:May. AttheMWCtradeshowinBarcelonaSprintannouncedMondaythatitwillturnonitsnext﹣generationwirelessnetworkinMaywithcustomersinChicagoAtlantaDallasandKansasCityplannedtobethefirsttogetaccesstothe5Gservice. Thecompanyplanstolaunch启动5GinHoustonLosAngelesNewYorkCityPhoenixandWashingtonduringthefirsthalfof2019. It'sunclearhowextensivetheinitialcoveragewillbeineachofthelaunchcities.SprintsaysthattheNewYorklaunchwillbefocusedonthenearly30squaremilescoveringMidtownandlowerManhattanwhiletheDallaslaunchwillcoverapproximately230squaremilescoveringthegreaterDallasFortWorthareasuggestingthatsomecitieswillbebettercoveredthanothers. Inadditiontoannouncingitsfirst5GcitiesSprintalsodisplayedanewdevice装置fromHTCcalledtheHTC5GHub.UnliketheLGphonethe5GHubisdesignedtobeplacedinsideyourhomeasanalternativetobroadbandfunctioningasamobilehotspotthatallowsforupto20devicestoconnectandtapintoSprint's5Gnetwork.With5G'sabilitytoofferfasterspeedsandlowerdelaysSprintsaysthisdevicecanbeusedfornotjuststreaming4KcontenttoaTVorconnectingtotheInternetbutalsoforplayinggamesonline. ThedevicealsohasaGigabitEthernet千兆以太网portforpluggingindevicesaswellasa5﹣inchscreen.AswiththeLGphonehowevernoexactpricingorreleasedatewasannouncedbeyondavaguethisspring. ThisHubislikea‘SwissArmyKnife'withmultipletoolsthatwillquicklymakeitvitalanduniversalforconnectedhomesandsmallbusinessesSprintCEOMichelCombessaidinanewsrelease.Itusesthespeedofourupcoming5Gnetworktodrivecontentsharinggamingentertainmentandmore. 1WhatcanwelearnabouttheSprint's5Glaunching? A.ItwillfirstbelaunchedinBarcelona. B.Itneedsafewmonthstobeready. C.Itwillfirststartwithafewcities. D.Itwillmeetwithsomedisapproval. 2Whatisthe5GHubdesignedtodo? A.Getdevicesconnectedoutdoors. B.Serveasamobilehotspot. C.FollowtheLGphone. D.TaketheplaceofTVsets. 3Whatdoestheunderlinedworditrefertointhelastparagraph? A.The5GHub. B.TheSwissArmyKnife. C.TheLGphone. D.The5Gnetwork. 4WhatdoesMichelCombesthinkofthe5GHub? A.Itisveryimportantforpromotingbusinessco﹣operations. B.ItisbecomingpopularwiththeSwissArmy. C.Itisveryaccessibletocustomersintermsoftheprice. D.Itissatisfactoryforitsdifferentfunctions.
15分Iwon'tcallmyselfthemostaccomplishedpersonwhenitcomesto1holdchopsticks.InfactI'mprettysurethatmytechniquelooksclumsyattimes.Itendtohold2Iinthemiddlemorebeginnerthanexpert. StillsinceIeatalmosteverymealwiththeeatingutensil器皿ofchoiceinChinait'snotuncommonforanewfriendoracquaintancetocometoasimple3concludeafterobservingmethatmyChinesehusbandJunmust4showmehowtousethem. Theyarewrong.I'veusedchopstickseversinceIwasateenageratimewhenmysisterandmotherwerebothfondofChinesecuisineandintroducedme5manynewdishesalongwiththe6preferutensilsinChina.Wealwayskeptbamboochopsticksalongwithour7knifeforksandspoonsreadyforwheneverwehappenedtohaveChinesefoodfordinner.Itwasmyclosestfamily8observedmyfirstmistakesImadeinusingchopsticks. PlusIlivedovertwoyearsinChinabeforeJunandIstarteddatingandI9expecttousechopsticksinalmosteveryrestaurantstandandbar.Trustmewhenyou'rehungryyoufigureoutprettyfastwhatittakestodown咽下10mealwiththeseutensils.
设NA为阿伏加德罗常数的值下列说法正确的是
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. LastweekItakepartintheCulturalExchangeWeekbutenjoyedmyselfinEngland.IvisitedthecitymuseumandseveralplaceofinterestwhichmademehavebetterunderstandingoftheEnglishsocietycultureandhistory. What'smoreIwasluckilyenoughtomeetmypenfriendTomthere.Istayedathishome.AndI'llneverforgetthedayswhenwespenttogether.WhenIleftEnglandheofferedtomeadictionaryasagift.It'sofgreathelpformetolearningEnglish.IwillmakefulluseofthemandlearnEnglishwell. IhopeTomwillcometoChinawhenit'sconvenienceforhim!
实验室如下图的装置模拟工业过程制取硫代硫酸钠夹持仪器和加热仪器均省略.其反应原理为2Na2S+Na2CO3+4SO23Na2S2O3+CO2 请回答 1下列说法不正确的是. A.装置A的烧瓶中的试剂应是Na2SO3固体 B.提高C处水浴加热的温度能加快反应速率同时也能增大原料的利用率 C.装置E的主要作用是吸收CO2尾气 D.装置B的作用之一是观察SO2的生成速率该处锥形瓶中可选用浓硫酸或饱和NaHSO3溶液 2反应结束后C中溶液中会含有少量Na2SO4杂质请解释其生成原因.
25分假设你叫李华你的美国笔友Joe对中国新农村建设中正在实施的厕所革命很感兴趣.因此他写信向你咨询.请你给他写一封回信就相关问题作一番简单的回答.内容包括: 1.什么是厕所革命; 2.厕所革命的意义; 3.具体措施有哪些. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯. 3.信的开头已给出不计入总同数. 参考词汇:厕所革命toiletrevolution改造transform排水drain DearJoe I'msogladtohearfromyouagainaftersomanydays.
下列实验能达到目的是
向恒温恒容密闭容器中充入1molX和2molY发生反应4Xg+2Yg⇌3Zg下列选项表明反应一定已达平衡状态的是
30分VickyHarjothegirlsittingnexttomeismybestfriendinhighschool.Sheis1andstraightforwardsoIcansharemyjoysandsorrowwithher.2I'mnotafraidofbeingstuckina3situationasIknowthatshewillalwaysbetheretocomfortme. WhatpleasesmemostisthatsheandIboth4ofgoingtothesameuniversityaftergraduation﹣BostonUniversity.IbelievethatIhaveagood5ofLiterature.Howeveritisupsettingthat6IalwaysgetgoodgradesinLiteratureIcan'tperformwellinothersubjectslikebiologyandmath.7Ihavehertoaccompanymethroughthis8time. Istillhavevivid9ofthedaywhenthemidtermexamresults10out.AsIheldtheschoolreportmyheartstartedto11fasterandmyhandsgotsweaty.MyGoodness!Whycouldn'tImakeanyprogressinbiologyandmath?I'ma12!StuckindesperationIheldmyheadinmyhandswhiletears13downmyface. Ididn'tknowhowmuchtimehadgone14whenIfeltapersonbymyside.ThenIhearda15voiceinmyears:Feelingbetternow?It'shightimewetalkedaboutthenextstep.LeavemealonepleaseIcried.That'sOKshereplied.Butdoyouknow16aneaglefliesintheclearbluesky?Doyouknowit17somedifficulttimesfirst? Shewasright.Weallhavepreciousopportunitiesto18thesweetnessandbitternessoflifeandit'sallpartsof19life.Herwordsimpressedmedeeply.Shehasencouragedmeto20mydreameverystepoftheway.Thankyoumyangel天使. 1A.generous B.honest C.reliable D.confident 2A.What'smore B.However C.Otherwise D.What'sworse 3A.pleasant B.desperate C.scary D.hopeful 4A.remind B.conduct C.adore D.dream 5A.control B.grasp C.idea D.influence 6A.unless B.asif C.evenif D.as 7A.Unluckily B.Fortunately C.Naturally D.Surprisingly 8A.happy B.precious C.explicit D.tough 9A.memories B.descriptions C.realities D.purposes 10A.called B.figured C.came D.carried 11A.beat B.rise C.struck D.work 12A.failure B.teenager C.success D.senior 13A.pulled B.broke C.streamed D.took 14A.through B.out C.by D.over 15A.sad B.soft C.strange D.sharp 16A.how B.why C.whether D.where 17A.forgets B.witnesses C.skips D.experiences 18A.remember B.taste C.appreciate D.convey 19A.real B.great C.different D.cozy 20A.keepupwith B.makeupfor C.holdonto D.liveupto
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